JP6042882B2 - Partition - Google Patents

Description

  The present invention relates to a partition body such as a wall or a floor that partitions a space in which a propagated electromagnetic wave can be attenuated or transmitted according to a frequency.

  As disclosed in Patent Documents 1 and 2, a building with an electromagnetic wave shielding function is constructed to prevent the invasion of unnecessary electromagnetic waves from the outside to the inside of the building and the leakage of electromagnetic waves from the inside to the outside of the building. Has been. That is, when electromagnetic waves propagating outside the building enter the room, images on televisions and personal computers may be disturbed, and electronic devices may malfunction. In addition, information may leak due to propagation of electromagnetic waves generated by indoor wireless transmission to the outside of a building.

On the other hand, walls and floors of buildings and the like are mainly constructed of reinforced concrete, but reinforced concrete itself constructed to satisfy only the proof stress required as a structure has a low electromagnetic wave shielding function.
Therefore, for example, a building having an electromagnetic wave shielding function is formed by attaching a member having an electromagnetic wave shielding function such as an iron plate, a metal net, a metal foil, or a metal mesh to the surface of a reinforced concrete wall or floor.

Japanese Patent Laid-Open No. 11-121973 JP 2002-54248 A

  However, even if you are inside a building, you do not want to leak the radio LAN (Local Area Network) radio waves to the outside, but you want to receive mobile phone radio waves. There are also electromagnetic waves.

  Therefore, an object of the present invention is to provide a partition that can be selected to attenuate or transmit electromagnetic waves according to a target frequency.

In order to achieve the above object, the partition of the present invention is a partition that is selectively set to attenuate or transmit electromagnetic waves of a target frequency that is propagated in a predetermined propagation direction, and the propagation direction And a medium portion formed in a wall shape or a slab shape with a thickness direction of the medium portion and a first surface in the thickness direction of the medium portion with a constant interval P in a direction substantially perpendicular to the thickness direction. A plurality of first belt-shaped conductors and a plurality of belt-shaped conductors arranged at the interval P substantially perpendicular to the first belt-shaped conductors and formed in a substantially square grid. A plurality of second strips arranged at the same interval P in the substantially same direction as the first strip conductor on the second surface in the thickness direction of the medium portion. A plurality of strip conductors arranged at a distance P substantially perpendicular to the conductor and the second strip conductor; And a second conductor portion formed in the eyes of the lattice of substantially square case of transmitting electromagnetic waves of the target frequency, the wavelength lambda _m in the medium portion thereof degree n (n is 0 or a positive integer) The width w of the strip-shaped conductor and the thickness d of the medium portion are d = nλ _m / 2−2α × (Pw) −2βλ _m (where α = 0.158 ± 0.0333, β = −0.0280 ± 0.0169). When the relational expression is satisfied and the electromagnetic wave of the target frequency is attenuated, the wavelength λ _a in the medium part, its order n (n is 0 or a positive integer), the thickness d of the medium part, and the interval P are as follows. P = λ _a / (√ (A _e − (nλ _a / 2d) ² ))) (A _e is 1 or a variable determined based on experiment) and the thickness of the medium portion d and the interval P are set.

The partition body of the present invention configured as described above is formed in a substantially square grid of intervals P by a plurality of strip-shaped conductors on two surfaces in the thickness direction of a medium portion formed in a wall shape or a slab shape. The first conductor portion and the second conductor portion are provided.
When the electromagnetic wave of the target frequency is transmitted, the wavelength λ _m in the medium part, its order n, the width w of the strip conductor, and the thickness d of the medium part are d = nλ _m / 2−2α × (P−w ) −2βλ _m (where α = 0.158 ± 0.0333, β = −0.0280 ± 0.0169). When the electromagnetic wave of the target frequency is attenuated, the wavelength λ _a in the medium part, its order n, the thickness d of the medium part, and the interval P are P = λ _a / (√ (A _e − (nλ _a / 2d ² ) Set so as to satisfy the relational expression (A _e is 1 or a variable determined based on experiments).

As described above, the electromagnetic wave having the target frequency can be transmitted or attenuated only by adjusting the thickness d of the medium portion, the interval P or the width w of the strip conductors. For this reason, when it is desired to attenuate an electromagnetic wave having a specific frequency between the space divided by the partition and the outside, or on the contrary, when an electromagnetic wave having a specific frequency is to be transmitted, Electromagnetic waves can be attenuated or transmitted only by disposing a strip conductor on the surface of the medium portion formed in a slab shape.
Moreover, the width of the frequency to be attenuated can be widened by using a strip-shaped conductor having a width w. Furthermore, the target frequency can be attenuated even if a certain dimensional error occurs.

It is explanatory drawing explaining the partition body of embodiment of this invention. It is a perspective view explaining the structure of the partition body of embodiment of this invention. It is explanatory drawing which showed typically the analysis model performed in order to confirm the electromagnetic wave control performance of a partition. It is the graph which compared the attenuation | damping and permeation | transmission state of electromagnetic waves by changing the width | variety w of a strip | belt-shaped conductor. It is the graph which compared the attenuation | damping and permeation | transmission state of electromagnetic waves by changing the width | variety w of a strip | belt-shaped conductor. It is the graph which compared the attenuation | damping and permeation | transmission state of electromagnetic waves by changing the width | variety w of a strip | belt-shaped conductor. It is explanatory drawing which showed typically the state in which the reflective surface of the electromagnetic wave to permeate | transmits protrudes from the eyes of a lattice. It is the graph which showed correlation with the breadth (opening width | variety) of a grid, and the length which a reflective surface protrudes from the grid of a grid. It is the graph which showed the attenuation | damping and permeation | transmission state of the partition body in which the grating | lattice of the space | interval P before correction | amendment demonstrated in Example 1 was formed with the strip | belt-shaped conductor. Is a graph grid correction interval P _C showed attenuation and transmission state of the partition body formed by strip conductor after correction as described in Example 1. It is explanatory drawing explaining the partition in which the 3rd conductor part of Example 2 is arrange | positioned. It is a figure for demonstrating the conversion method of the thickness of the medium part of the partition provided with the medium part by which M layer of Example 3 was laminated | stacked. It is a figure for demonstrating the space | interval P (1) and P (M) of the 1st conductor part of a partition provided with the medium part on which M layer of Example 3 was laminated | stacked, and a 2nd conductor part. FIG. 6 is an explanatory diagram for explaining a configuration of a strip-shaped conductor having a deformed portion according to a fourth embodiment. It is the graph which showed the attenuation | damping and permeation | transmission state of the partition body in which the grating | lattice of the space | interval P before correction demonstrated in Example 5 was formed with the strip | belt-shaped conductor. Is a graph grid correction interval P _C showed attenuation and transmission state of the partition body formed by strip conductor after correction as described in Example 5. It is the graph which compared the relationship between the object frequency which can be attenuated demonstrated in Example 6, and the space | interval P with the theoretical value ( _Ae = 1) and the measured value. It is the graph which compared the relationship between the object frequency which can be attenuated demonstrated in Example 6, and the space | interval P with the theoretical value ( _Ae = 2.3) and the measured value. It is the graph which compared the relationship between the object frequency which can be attenuate | damped when thickness d demonstrated in Example 6 (d = 130mm), and the space | interval P with the theoretical value ( _Ae = 2.3) and the measured value. . It is the graph which compared the relationship between the object frequency which can be attenuate | damped when thickness d demonstrated in Example 6 (d = 110mm), and the space | interval P with the theoretical value ( _Ae = 2.3) and the measured value. . It is the graph which compared the relationship between the object frequency which can be attenuated when the thickness d demonstrated in Example 6 is changed (d = 100 mm), and the space | interval P with the theoretical value ( _Ae = 2.3) and the measured value. .

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the partition 1 according to the present embodiment partitions one space R1 and the other space R2. By providing the partition 1, for example, shielding of electromagnetic waves of a target frequency that propagates in the propagation direction from the internal space R1 to the external space R2 or from the external space R2 to the internal space R1. Transmission is performed selectively.

  Here, “shielding” refers to a state where an electromagnetic wave shielding effect (SE: Shield Effectiveness) is obtained by attenuating the propagating electromagnetic wave. In addition, “electromagnetic wave is attenuated” means that the electric field strength is weakened by passing through the partition 1. On the other hand, “transmission” means that the propagation electromagnetic wave is attenuated by the partition body 1 so that the reception of the electromagnetic wave is not affected, hardly attenuated, or the electric field strength is stronger than when the partition body 1 is not provided. Say that. For example, a state where the transmission loss is smaller than a threshold value is referred to as “transmission”.

First, the configuration of the partition 1 will be described with reference to FIGS.
As shown in FIGS. 1 and 2, the partition 1 includes a concrete portion 4 as a medium portion and a first conductor portion disposed on a first surface (front surface 11) facing the space R 1 side of the concrete portion 4. And the rear lattice 3 as the second conductor portion disposed on the second surface (rear surface 12) facing the space R2 side of the concrete portion 4. That is, the front lattice 2 and the rear lattice 3, and the front surface 11 and the rear surface 12, which are disposed substantially in parallel when viewed from the side with a distance of the thickness d of the concrete portion 4 in the propagation direction of the electromagnetic wave, are approximately parallel. The partition 1 is formed by the wall-shaped concrete part 4 to be.

  Here, although the concrete part 4 shape | molded with concrete is demonstrated as a medium part in this Embodiment, it is not limited to this, Arbitrary materials with a clear dielectric constant can be used. For example, building materials such as reinforced concrete, mortar, gypsum (gypsum board) or wood, glass, acrylic, polycarbonate (PC), polyethylene terephthalate (PET), polyethylene (PE), polystyrene, polypropylene, acrylonitrile butadiene styrene copolymer (ABS) The medium portion can be formed of any material such as resin, paper, or rubber such as tetrafluoroethylene (for example, Teflon (registered trademark)), paraffin, urethane, epoxy, vinyl chloride, silicon, bakelite, or polystyrene foam. .

Further, the first conductor portion and the second conductor portion are formed of an arbitrary conductor. As the conductor, a material having an electric conductivity equal to or higher than that of graphite (electric conductivity: 10 ⁶ S / m) can be used. For example, the conductor portion can be formed of a metal such as iron, stainless steel, copper, aluminum, gold or silver, a mineral such as graphite, carbon, ceramic, or conductive plastic.

  As shown in FIG. 2, the front lattice 2 intersects the vertical tapes 21,... As a plurality of first strip conductors arranged in the vertical direction so as to be substantially perpendicular to the vertical tape 21. It forms in a grid | lattice form with the horizontal tapes 22 ... as a some strip | belt-shaped conductor. That is, the vertical tapes 21,... And the horizontal tapes 22,... Are arranged with a certain interval (lattice interval P) in a direction substantially perpendicular to the thickness direction of the concrete portion 4. Note that either the vertical tape 21 or the horizontal tape 22 may be the first strip conductor.

The front lattice 2 is formed by sticking a conductor tape such as an aluminum tape or a copper tape on the front surface 11 of the concrete portion 4 as a longitudinal tape 21 and a lateral tape 22 in a lattice shape. That is, the horizontal tapes 22 and 22 and the vertical tapes 21 and 21 are arranged substantially in parallel with a constant lattice spacing P, respectively. Moreover, the width w of the vertical tape 21 and the horizontal tape 22 is substantially the same. Here, the vertical tape 21 and the horizontal tape 22 are band-like members whose side edges are substantially parallel, and the distance between the side edges in the direction substantially perpendicular to the extending direction is the tape width w.
Further, from the relationship between the lattice spacing P and the tape width w, as shown in FIG. 2, the opening width S serving as the lattice mesh is S = P−w.

  On the other hand, the rear lattice 3, like the front lattice 2, is substantially perpendicular to the longitudinal tapes 31,... As a plurality of second strip conductors arranged in the vertical direction and to the longitudinal tape 31. Are formed in a lattice shape by a plurality of horizontal tapes 32,. That is, the vertical tapes 31,... And the horizontal tapes 32,... Are arranged substantially in parallel with a constant interval (lattice interval P) in a direction substantially orthogonal to the thickness direction of the concrete part 4. . For the vertical tape 31 and the horizontal tape 32, similarly to the front lattice 2, a conductive tape such as an aluminum tape or a copper tape having substantially the same width w is used.

Here, in the present embodiment, in order to describe the case where the vertical tapes 21 and 31 and the horizontal tapes 22 and 32 that are so thin that the thickness is almost negligible compared to the thickness of the concrete portion 4, the front lattice 2 ( The distance in the propagation direction of the electromagnetic wave between the first conductor portion) and the rear lattice 3 (second conductor portion) is such that the thickness of the concrete portion 4 can be determined without specifying the crossing surface, inner surface, or outer surface of the conductor tape. Approximately equal to d.
On the other hand, when a thick strip conductor is used, the grid is formed so that a flat surface is formed without overlapping the vertical and horizontal strip conductors at the intersection, and the flat surface (the lattice The inner surface) may be attached to the front surface 11 and the rear surface 12, respectively, and the distance between the inner surfaces may be the distance in the propagation direction of electromagnetic waves between the first conductor portion and the second conductor portion.
In addition, when using a thick strip | belt-shaped conductor, the outer surface of a 1st conductor part (or 2nd conductor part) may protrude greatly from the front surface 11 (or rear surface 12) of the concrete part 4. FIG.

Next, with reference to FIGS. 3 to 6, it will be described that the partition 1 of the present embodiment has a characteristic of transmitting or shielding an electromagnetic wave having a specific frequency.
FIG. 3 is a diagram schematically showing an analysis model used in a numerical simulation by the finite element method. As shown in FIG. 3, an internal space MR1 and an external space MR2 are modeled on both sides of the modeled partition M1. In addition, the inner space MR1 side of the partition body M1 is the front surface M11, and the outer space MR2 side of the partition body M1 is the rear surface M12. Then, a front (M) -shaped front grid M2 is modeled on the front surface M11 of the concrete part M4, and a rear grid M3 is modeled on the rear surface M12. The thickness of the concrete part M4 was 48.2 mm, and the relative dielectric constant ε _r was 4.3 as will be described later. Further, the lattice interval P between the front lattice M2 and the rear lattice M3 was 77.2 mm, the tape thickness was 0.11 mm, and the tape width w was changed as described later.

  In this analysis, a vertically polarized plane wave was propagated from the internal space MR1 side toward the partition M1, and the electric field strength of the electromagnetic wave propagated to the external space MR2 side was confirmed. In addition, the vertical polarization was simulated by changing the frequency from 0.01 GHz to 3.0 GHz in increments of 0.01 GHz.

FIG. 4 is a graph showing a result of simulation performed by changing the frequency f from 0.01 GHz to 3.0 GHz in increments of 0.01 GHz in a model of each partition M1 in which the tape width w is changed to 2 mm and 20 mm. .
Here, the transmission loss expressed in units of decibels (dB) on the vertical axis indicates that the electromagnetic wave is shielded as the value increases, and indicates that the electromagnetic wave is transmitted when the value is close to 0 dB.

  In FIG. 4, when comparing the graph (solid line) with a tape width w of 2 mm and the graph (dashed line) with a tape width w of 20 mm, the wider the width of the frequency that can be shielded, the wider the tape width w. Recognize.

  Further, in FIG. 5, when comparing the graph with the tape width w 20 mm (solid line), the graph with the tape width w 25 mm (dashed line), and the graph with the tape width w 30 mm (dashed line), the tape width The peak of the frequency that can be shielded is close when w is 20 mm and 25 mm, but the peak of the frequency that can be shielded is shifted when the tape width w is 30 mm.

  In FIG. 6, when comparing the graph (solid line) with a tape width w of 30 mm and the graph (dashed line) with a tape width w of 40 mm, if the tape width w becomes too wide, the range of frequencies to be shielded is I found it too wide. Therefore, it was found that the tape width w needs to be adjusted to an appropriate width in order to set the frequency to be transmitted.

Next, the frequency to be transmitted is examined. Here, the wavelength λ _m of the electromagnetic wave in the concrete part can be calculated by the following conversion formula where ε _r is the relative dielectric constant of the concrete, f is the frequency of the electromagnetic wave, and v is the speed of light.
λ _m = v / f × 1 / √ε _r (1)
Here, the relative dielectric constant ε _r of the concrete can be 4.3. The glass is the dielectric constant epsilon _{r =} 6.4, acrylic relative permittivity epsilon _{r =} 1.7, polycarbonate relative permittivity epsilon _{r =} 2.7, gypsum board and wood be calculated using the relative dielectric constant epsilon _{r =} 2.3 Can do.

If a reflection surface for electromagnetic waves to be transmitted is formed at the positions of the front surface 11 and the rear surface 12 of the concrete portion 4, n times the half of the wavelength λ _m in the concrete portion (that is, half wavelength: λ _m / 2) ( It can be said that the electromagnetic wave of the frequency f used as n is 0 or a positive integer strongly transmits.
d = nλ _m / 2 (2)
However, it has been found that the assumption of the reflecting surface position deviates from the actual measurement result.

FIG. 7 is an explanatory diagram when it is considered that the reflection surface of the electromagnetic wave to be transmitted protrudes from the grid, that is, between the horizontal tapes 22 and 22 (32 and 32). Here, when the distance between the horizontal tapes 22 and 22 (32, 32) is the opening width S, the distance obtained by adding the tape width w to the opening width S is the lattice interval P.
Further, if the length of the reflecting surface protruding from the front surface 11 (or the rear surface 12) is the reflecting surface protrusion length Q, the distance dr between the reflecting surfaces is a distance obtained by adding 2Q to the thickness d of the concrete portion 4. .
Based on the relationship shown in FIG. 7, the reflection surface protrusion length Q can be calculated from the wavelength λ _m in the concrete portion 4 and its order n (n is 0 or a positive integer) by the following equation. it can.
Q = (nλ _m / 2−d) / 2 (3)

Therefore, the result of examining the correlation between the opening width S and the reflection surface protrusion length Q is shown in FIG. Here, the opening width S and the reflection surface protrusion length Q are made dimensionless by the wavelength λ _m in the concrete portion.

On the other hand, the relationship between the opening width S (= P−w) and the reflection surface protrusion length Q can be expressed by the following equation.
Q / λ _m = α · S / λ _m + β = α (P−w) / λ _m + β (4)
Further, referring to the equation (3), the following equation is established.
Q / λ _m = (nλ _m / 2−d) / 2 / λ _m (5)
And the following formulas can be derived from formulas (4) and (5).
(nλ _m / 2−d) / 2 / λ _m = α (P−w) / λ _m + β (6)
d = nλ _m / 2−2α (P−w) −2βλ _m (7)
Here, α and β are α = 0.158 ± 0.0333 and β = −0.0280 ± 0.0169 from the regression line (Q / λ _m = 0.1058 S / λ _m −0.028; determination coefficient R ² = 0.9776) in FIG. .

From the above, if the frequency f _m of the electromagnetic wave desired to be transmitted and the order n and the tape width w and the grating pitch P is specified, equation (1), concrete thickness d is calculated using (7) part 4 by building partition member 1 was set, it is possible to transmit electromagnetic waves of the target frequency f _m.

  For example, the frequency of electromagnetic waves often used in a wireless local area network (LAN) is around 2.45 GHz. In order to send wireless LAN electromagnetic waves to a printer or server in an adjacent room, a partition 1 that is set to transmit electromagnetic waves of the frequency of the wireless LAN may be installed at the boundary with the adjacent room.

Next, we will investigate the frequency that is the peak of shielding.
When the electromagnetic wave is shielded, the partition 1 operates as a rectangular cavity resonator (waveguide) having a boundary parallel to the resonance direction (y-axis direction in FIG. 3) of the front lattice 2 and the rear lattice 3. It can be said that. The waveguide is a rectangular parallelepiped having a square cross section with one side a.
When electromagnetic waves are transmitted in the axial direction in the waveguide, a portion where the electric field is strong and a portion where the electric field is weak are generated alternately. That is, the electric field is periodically distributed along the axial direction of the waveguide. The periodic distance of this electric field (for example, the distance from a place where the electric field is strong to the next strong place) becomes the guide wavelength λ _g . The guide wavelength λ _g can be calculated by the following equation.
λ _g = λ _a / (√ (1- (nλ _a / 2d) ² )) (8)
Here, λ _a is the wavelength in the concrete part, n is 0 or a positive integer, and d is the thickness of the concrete part 4 (= length a of one side of the waveguide cross section).

And the electromagnetic wave of the frequency f used as the guide wavelength (lambda) _g substantially equal to the grating | lattice space | interval P is shielded strongly.
P = λ _g (9)
Therefore, the following equation can be derived from equations (8) and (9).
P = λ _a / (√ (1- (nλ _a / 2d) ² )) (10)
Here, λ _a is the wavelength of the electromagnetic wave (frequency f _a ) to be shielded in the concrete part, n is 0 or a positive integer, and d is the thickness of the concrete part 4. Equation (10) is applied when λ _a / P <1.

From the above, if the frequency f _{a of the} electromagnetic wave to be shielded, the order n, and the thickness d of the concrete part 4 are specified, the lattice spacing P calculated using the equations (1) and (10) is set. been front grid 2 and to construct a partition member 1 having a rear grating 3, it is possible to shield electromagnetic waves of the target frequency f _a.

  For example, when it is not desired to leak the electromagnetic wave of the wireless LAN to the outside of the building, the partition body 1 set so as to shield the electromagnetic wave of this frequency at the boundary inside and outside the building may be installed.

Next, the effect | action of the partition 1 of this Embodiment is demonstrated.
The partition 1 of the present embodiment configured as described above has a plurality of vertical tapes 21,... And a plurality of horizontal tapes on the front surface 11 and the rear surface 12 of the concrete portion 4 formed in a wall shape or a slab shape. .., And a rear lattice 3 formed in the same manner.
And when transmitting electromagnetic waves of the target frequency f _m , the value calculated by specifying the wavelength λ _m in the concrete part, its order n, and the tape width w, and substituting these values into the relational expression (7). Based on the above, the thickness d of the concrete part 4 is set. That is, to calculate the wavelength lambda _m the target frequency f _m is desired to transmit the partition member 1 by the conversion formula described above (1), determines the order n. Subsequently, the value calculated using the relational expression (7) is set to the thickness d of the concrete portion 4.

On the other hand, when shielding the electromagnetic wave of the target frequency f _a , the wavelength λ _a in the concrete part, its order n, and the thickness d of the concrete part 4 are specified, and these values are expressed in the relational expression (10). The lattice interval P between the front lattice 2 and the rear lattice 3 is set based on the value calculated by substitution. That is, the wavelength λ _a of the target frequency f _a desired to be shielded by the partition 1 is calculated by the above conversion formula (1), and the order n and the thickness d of the concrete portion 4 are determined. Subsequently, the value calculated using the relational expression (10) is set as the lattice interval P between the front lattice 2 and the rear lattice 3.

Thus, by adjusting the grating period P and the tape width w of the concrete section thickness of 4 d or longitudinal tape 21, 31 and horizontal tape 22, 32, the frequency f _m of interest, an electromagnetic wave of f _a It can be transmitted or attenuated. Therefore, and if you want to shield the electromagnetic waves of a specific frequency f _a with the space and the outside, separated by the partition member 1, or when it is desired to transmit the electromagnetic wave of the specific frequency f _m in the opposite, various Electromagnetic waves can be attenuated or transmitted by simply attaching the front lattice 2 or the rear lattice 3 to the surface of an existing or newly installed wall or slab.

Examples of the building or room for constructing such a partition 1 include a hospital, an office where a wireless LAN can be used, and a conference room. These spaces have a desire to shield or transmit only specific electromagnetic waves.
For example, the frequency of electromagnetic waves in mobile phones and private radios is around 1.5 GHz. When it is desired to receive a cellular phone in an office or the like, a partition 1 that is set to transmit electromagnetic waves around a frequency of 1.5 GHz may be installed at the boundary between the inside and outside of the building.
On the other hand, when it is not desired to allow electromagnetic waves from a mobile phone or the like to enter from outside in a concert hall or the like, a partition 1 that is set to shield electromagnetic waves of this frequency at the inner and outer boundaries of the hall may be installed. .

Although you can have inside a building radio phone wants to receive radio waves of the wireless LAN such as when you do not want to leak to the outside, and the electromagnetic wave frequency f _a is desired to shield the electromagnetic waves of a frequency f _m which is desired to be transmitted In some cases, an electromagnetic wave can be transmitted according to the frequencies f _m and f _a by providing a partition body 1 in which the thickness d of the concrete portion 4 and the lattice spacing P and the tape width w of the front lattice 2 and the rear lattice 3 are adjusted. It is possible to perform control to make it shield or shield.

  On the other hand, when it is necessary to shield most electromagnetic waves, such as data centers, server rooms, broadcast studios, photography studios, airport radar control rooms, electromagnetic wave shield rooms, etc., the thickness d of the concrete portion 4 and the lattice spacing P or tape By adjusting the width w, it is possible to arrange the partition body 1 that exhibits a desired function.

Moreover, such a partition 1 can be constructed directly at the building construction site. Furthermore, the precast panel which comprises the partition 1 in a factory, a work yard, etc. can be manufactured previously, and it can also be set as the partition 1 by assembling a precast panel in a construction site.
And if it is a method which manufactures a precast panel in a factory etc., it can stably arrange | position the front side grating | lattice 2 and the back side grating | lattice 3 of the exact grating | lattice space | interval P to the concrete part 4 of the exact thickness d. Furthermore, since the concrete part 4 can also be formed with high quality, a stable quality partition 1 having a desired function can be constructed.

  Moreover, not only the outer wall that partitions the space R1 inside the building and the external space R2, but also the partition walls 1 and the slabs of the floor and ceiling can be formed by the partition body 1. Furthermore, it can be set as the partition body 1 by providing the front side grid | lattice 2 and the rear side grid | lattice 3 by making the front and back or upper and lower surfaces, such as an existing wall and a floor slab, into the front surface 11 and the rear surface 12.

Moreover, if the tape is affixed like the vertical tapes 21 and 31 and the horizontal tapes 22 and 32, the workability is better than when the reinforcing bars are embedded in the wall, and the partition 1 can be easily constructed. it can.
In addition, conductor tapes such as aluminum tapes can be easily obtained, and dimensions such as tape width w can be easily selected and processed, so that they are excellent in economic efficiency and workability.
If the front lattice 2 and the rear lattice 3 are formed by attaching the vertical tapes 21 and 31 and the horizontal tapes 22 and 32, the lattice interval P can be easily adjusted to an arbitrary size.

Further, by using a strip-like conductor having a width (tape width w) such as the vertical tapes 21 and 31 and the horizontal tapes 22 and 32, the width of the frequency to be attenuated can be widened. Furthermore, it is possible to reliably attenuated for some even if dimensional errors, target frequency f _a which is set as the peak frequency.

  Hereinafter, the Example of the partition 1 demonstrated in the said embodiment is described. Note that the description of the same or equivalent parts as the contents described in the above embodiment will be described using the same terms or the same reference numerals.

In the above-described embodiment, the partition body 1 having the concrete portion 4 as the medium portion has been described. In the first embodiment, a case where the doorway wall is used as the medium portion will be described. The door wall of the first embodiment is formed to have a wall thickness d = 119 mm by filling glass wool between a pair of plaster boards arranged at intervals. The front lattice 2 and the rear lattice 3 are formed on the front surface 11 and the rear surface 12 of the doorway wall by sticking aluminum tape (thickness 0.11 mm) having a tape width w of 25 mm in a lattice shape. (See FIG. 2). Note that the relative dielectric constant ε _r of the doorway wall is 1.0, which is almost the same as that of air.

We will consider shielding only electromagnetic waves (frequency: 2.45 GHz) of wireless LAN with this door wall.
Since it is desired to shield the electromagnetic wave having the frequency f = 2.45 GHz, when calculating by substituting ε _r = 1.0 into the equation (1) described in the above embodiment, the wavelength λ _a in the door wall of the electromagnetic wave is 122.4 mm. .
Subsequently, when the calculation is performed according to the equation (10) in the case of the order n = 1, the lattice interval P is 142.7 mm. The simulation results are shown for a model (see FIG. 3) of a partition M1 having a thickness of 119 mm provided with a front lattice M2 and a rear lattice M3 having a tape width w = 25 mm and a lattice interval P = 142.7 mm. 9 shows.

As shown in FIG. 9, the frequency (peak frequency) of the electromagnetic wave most shielded with a transmission loss of 27.0 dB was 2.36 GHz. That is, it is slightly deviated from the frequency 2.45 GHz of the electromagnetic wave of the wireless LAN that was most desired to be shielded.
Thus, the peak of the frequency to be shielded may deviate from the result calculated by Expression (10). It is unclear when such a shift occurs, but such a shift can be corrected, and the method will be described below.

If the deviation in the target frequency as the peak of an electromagnetic wave desired to be attenuated as described above occurs, the wavelength in the air of the target frequency f _a to be the peak (= 2.45GHz) λ _C and (= 122.4mm), the grating pitch P The correction interval P _C is calculated from the wavelength λ ₀ (= 127.0 mm) in the air having the peak frequency f (= 2.36 GHz) in the case of (= 142.7 mm) by the following equation.
P _C = λ _C × P / λ ₀ (11)
= 122.4 × 142.7 / 127.0 = 137.5 mm

Expression (11) is a relational expression using the fact that the lattice spacing P / wavelength λ is constant. Then, using the correction interval P _C calculated by the equation (11), a partition M1 having a thickness of 119 mm provided with a front lattice M2 and a rear lattice M3 having a tape width w = 25 mm and a lattice interval P = 137.5 mm. FIG. 10 shows the result of simulation for the model.
Referring to FIG. 10, when the frequency (peak frequency) of the electromagnetic wave is 2.46 GHz, the transmission loss is 42.8 dB and is most shielded. That is, by correcting the grid interval P to the correction interval P _C calculated using the equation (11), it is possible to reliably shield the desired electromagnetic wave (frequency f _a = 2.45 GHz) of the wireless LAN. Become.
Other configurations and operational effects of the first embodiment are substantially the same as those in the above embodiment, and thus description thereof is omitted.

  Hereinafter, a partition 5 having a different form from the partition 1 described in the above embodiment will be described. Note that the description of the same or equivalent parts as the contents described in the above embodiment will be described using the same terms or the same reference numerals.

  In the partition body 5 shown in FIG. 11 of the second embodiment, an intermediate lattice 53 as a third conductor portion is embedded in the concrete portion 4 between the front lattice 2 and the rear lattice 3. In other words, the intermediate lattice 53 is disposed substantially in the center of the concrete portion 4 in the thickness direction so as to be substantially parallel to the front lattice 2 and the rear lattice 3.

The intermediate lattice 53 is a plurality of strip-shaped conductors that intersect with the longitudinal tape 531 so as to be substantially perpendicular to the longitudinal tapes 531,... As a plurality of third strip-shaped conductors erected in the vertical direction. It is formed in a lattice pattern with the horizontal tapes 532,. That is, the vertical tapes 531,... And the horizontal tapes 532,... Are arranged substantially in parallel with a constant interval (lattice interval P ₁ ) in a direction substantially perpendicular to the thickness direction of the concrete portion 4. The For the vertical tape 531 and the horizontal tape 532, a conductive tape having a tape width w ₁ such as an aluminum tape or a copper tape can be used.

Then, as shown in FIG. 11, the intermediate grating 53 is arranged so as to be positioned at the approximate center of the distance in the thickness direction between the front grating 2 and the rear grating 3. Therefore, half of the distance (thickness d) between the front surface 51 as the first surface of the partition 5 and the rear surface 52 as the second surface is the distance d ₁ between the front surface 51 or the rear surface 52 and the intermediate lattice 53. Become.

The case where the intermediate grating 53 is arranged in this way will be described with comparison between FIG. 11 and FIG. 1. The resonance of the wavelength λ _m of the electromagnetic wave having the odd order n (n = 1, 3,...) By disposing the grating 53, the resonance disappears, and only the resonance of the wavelength λ _m of the electromagnetic wave having the even-order n (n = 2, 4,...) Where the position of the intermediate grating 53 coincides with the resonance node remains. That is, when the intermediate grating 53 is arranged at a position where the thickness d of the concrete portion 4 is equally divided by (N =), the odd-numbered wavelength λ _m other than the 2 × n order is the concrete on which the intermediate grating 53 is arranged. Since the open surface of resonance is located at the center of the portion 4, resonance is suppressed.

Even when the intermediate grating 53 is arranged, the state of the transmission peak can be changed by changing the grating interval P ₁ of the intermediate grating 53. That is, when the intermediate grating 53 is arranged, the primary transmission peak approaches the secondary transmission peak, and depending on the size of the lattice interval P ₁ of the intermediate grating 53, the two peaks are combined into one. It may change to a peak with an appreciable width.
For example, by setting the grating interval P ₁ of the intermediate grating 53 to 1/4 or less of the wavelength λ _m , it is possible to widen the bandwidth of the transmissive secondary (even order) frequency f _m .

Thus between the front grid 2 and the rear grating 3, by appropriately lattice spacing P ₁ is arranged an intermediate lattice 53 in the tape width w ₁ that is set and spread to the peripheral region of the target frequency f _m It can set to the partition body 5 which can permeate | transmit the electromagnetic wave of a frequency band.
Further, if it is possible to widen the frequency band to be transmitted, even if an error occurs due to uncertain factors such as the dielectric constant and dimensional errors, it is possible to transmit electromagnetic waves of the target frequency f _m.

In the second embodiment, the case where the number of the intermediate grids 53 is one has been described. However, a plurality of third conductor portions (intermediate grids 53,...) Can also be arranged inside the partition body 5. When N-1 (N is a positive integer of 2 or more) third conductor parts (intermediate lattice 53,...) Are arranged, they are arranged at equal intervals in the thickness direction of the concrete part 4. That is, the distance obtained by equally dividing the distance (thickness d) between the front surface 51 and the rear surface 52 of the partition 5 by N is the distance between the front surface 51 and the intermediate lattice 53, between the intermediate lattices 53 and 53, and between the intermediate lattice 53 and the rear surface 52. d ₁ (= d / N).

And the partition body 5 in which N−1 intermediate lattices 53,... Are arranged between the front lattice 2 and the rear lattice 3 are respectively positioned at positions where the thickness d of the concrete portion 4 is equally divided into N. The gratings 53,... Are arranged, and the wavelength λ _m of orders other than the N × n order can be eliminated.
That is, by disposing intermediate lattices 53,... At a position that divides the thickness d of the concrete portion 4, in other words, the distance between the front lattice 2 and the rear lattice 3, into N equal parts, It is possible to control to eliminate the peak.

For example, by arranging two intermediate gratings 53 and 53, the primary and secondary transmission peaks can be eliminated, and the bandwidth of the third transmission peak can be widened. The primary and the electromagnetic wave near the peak of the second order transmission not want to transmit, when the frequency f _m of the electromagnetic wave desired to be transmitted is near the peak of the third order transmission is between the front grid 2 and the rear grating 3 by adjusting by placing two intermediate grid 53 can be controlled also to transmit electromagnetic waves of the target frequency f _m if there is an error in the setting and size of the dielectric constant.

So far, the control for eliminating the transmission peak of the electromagnetic wave by arranging the intermediate grating 53 has been described. However, the control for eliminating the shielding peak will be described below.
Although details are omitted, according to the analysis result, when no intermediate grid is arranged (analysis result of the partition 1 of the above embodiment), shielding peaks appear in two places, the primary and the secondary. When 53 is arranged (analysis result of the partition 5), it has been found that the n = first-order shielding peak disappears. This is considered to be because the resonance of the odd-order mode of the waveguide is suppressed by arranging the intermediate grating 53 at the substantially center in the thickness direction of the concrete portion 4.

By arranging the intermediate lattice 53 in the partition 5 in this way, it is possible to control to eliminate the shielding peak. For example, the electromagnetic wave near the peak of the primary shielding is desired to be transmitted, if the frequency f _a of an electromagnetic wave desired to be shielded only near the peak of the secondary shielding, intermediate grid between the front grid 2 and the rear grating 3 by adjusting to place 53, it can be controlled to shield only the electromagnetic waves of the target frequency f _a.
In addition, about the other structure and effect of Example 2, since it is substantially the same as the said embodiment or another Example, description is abbreviate | omitted.

  Hereinafter, a partition 6 having a different form from the partitions 1 and 5 described in the above embodiment or Example 2 will be described with reference to FIGS. 12A and 12B. Note that the description of the same or equivalent parts as those described in the above embodiment mode or other examples will be described using the same terms or the same reference numerals.

  In the partition body 6 described in the third embodiment, the medium portion is formed in a layer shape with a plurality of materials. The material of each layer may be a different material or a part of the same material. Here, for the sake of explanation, it is assumed that the M layer is laminated in the thickness direction.

  The partition 6 shown in FIG. 12B is a medium portion from the first layer through the i-th layer to the M-th layer between the front surface 61 as the first surface and the rear surface 62 as the second surface. Are arranged in parallel. .. Are arranged at equal intervals on the front surface 61 serving as the surface of the first layer, and the conductor tape serving as the strip conductor is disposed on the rear surface 62 serving as the surface of the M layer. 621 are arranged at equal intervals. The conductor tapes 611 and 621 are shown only in the lateral direction for the sake of simplicity, but the front and rear lattices 2 and 3 described in the above embodiment are arranged on the front surface 61 and the rear surface 62, respectively. Similarly, a substantially square grid is formed of strip-shaped conductors.

In order to apply the relational expression described in the above-described embodiment, it is necessary to make the following modifications to the partition 6 of the medium portion having such a multilayer structure. That is, as shown in FIG. 12B, the thickness d (i) of each layer and the relative dielectric constant ε _r (i) of each layer are different. First, as shown in FIG. Consider a provisional model in which the relative permittivity ε _r (0) is unified and replaced. In this temporary model, the tape width of the conductor tapes 611 and 621 is also set as the temporary width w (0), and the lattice interval between the conductor tapes 611 and 621 is also set as the temporary interval P (0).

Then, the thickness d (i) of each layer is determined by using the relative dielectric constant ε _r (i) and the temporary relative dielectric constant ε _r (0) of each layer as shown in the relational expression (12) d ′ (i). To correct.
d ′ (i) = d (i) × √ (ε _r (i) / ε _r (0)) (12)
Here, d ′ (i) is the converted thickness of each layer. The entire converted thickness d ′ of the provisional model is a value obtained by integrating the converted thickness d ′ (i) from the first layer to the Mth layer.
d ′ = Σd ′ (i) = Σ {d (i) × √ (ε _r (i) / ε _r (0))} (13)
On the other hand, if the wavelength of the electromagnetic wave of the target frequency f is λ _B , the wavelength λ (0) in the provisional model can be expressed by the following equation.
λ (0) = λ _B / √ε _r (0) (14)
When the converted thickness d ′ of the provisional model calculated in this way, the wavelength λ (0) in the provisional model, and the provisional width w (0) are transmitted through the electromagnetic wave described in the above embodiment. Substituting into the relational expression (7), the provisional interval P (0) is calculated (see FIG. 12A).

Based on the calculated provisional interval P (0), the lattice interval P (1) of the front surface 61 of the partition 6 and the lattice interval P (M) of the rear surface 62 are calculated by the following equations.
P (1) = P (0) × √ (ε _r (0) / ε _r (1)) (15)
P (M) = P (0) × √ (ε _r (0) / ε _r (M)) (16)
Further, based on the provisional width w (0), the tape width w (1) of the conductor tape 611 attached to the front surface 61 and the tape width w (M) of the conductor tape 621 attached to the rear surface 62 are expressed as follows. Calculate with the formula.
w (1) = w (0) × √ (ε _r (0) / ε _r (1)) (17)
w (M) = w (0) × √ (ε _r (0) / ε _r (M)) (18)

By performing such correction, the lattice spacings P (1) and P (M) and the tape widths w (1) and w (M) can be set for the multi-layer structure partition 6 as well.
In addition, about the other structure and effect of Example 3, since it is substantially the same as that of the said embodiment or another Example, description is abbreviate | omitted.

  Hereinafter, in Example 4, an allowable range in the case where a deformed portion occurs in the strip conductor will be described with reference to FIG. Note that the description of the same or equivalent parts as those described in the above embodiment mode or other examples will be described using the same terms or the same reference numerals.

  The strip-like conductors do not have to have the same width (tape width w) and the side edges parallel to each other like the left and right vertical tapes 21 and 21 and the horizontal tape 22 in FIG. For example, even when the deformed portion 23 is partially deformed like the central vertical tape 21A, the electromagnetic wave of the target frequency can be transmitted or attenuated. The allowable range will be described below.

  The deformed portion 23 of the vertical tape 21A has an upper portion that swells and erodes the opening width S, and a lower portion that is recessed and has a narrow tape width. Here, a portion that swells from the tape width w is defined as a convex portion 23a, and a length that protrudes most is defined as an output dimension 23c. Further, a portion recessed from the tape width w is defined as a recess 23b, and a length most depressed is defined as an input dimension 23d.

  If the outgoing dimension 23c and the incoming dimension 23d are less than half of the tape width w, it is allowed. However, the shape of the deformed portion 23 is allowed only when the areas of the convex portion 23a and the concave portion 23b are almost the same.

In this way, if the presence of the deformed portion 23 is recognized, the strictness of the construction is relaxed, so that the workability can be improved.
In addition, about the other structure and effect of Example 4, since it is substantially the same as that of the said embodiment or another Example, description is abbreviate | omitted.

  Hereinafter, in Example 5, an experimental result using a measurement sample simulating a door wall will be described in place of the simulation in the case where the partition 1 described in the first embodiment is a door wall. Note that the description of the same or equivalent parts as those described in the above embodiment mode or other examples will be described using the same terms or the same reference numerals.

  The measurement sample of the door wall is a 6mm thick plastic corrugated cardboard on both sides of a polystyrene foam board, and a wall is formed, and aluminum tape (tape width w = 25mm, thickness 0.11mm) is formed on the surface in a grid pattern. Made by sticking to.

  FIG. 14 is a diagram showing the results of measurement performed using a measurement sample in which a front lattice 2 and a rear lattice 3 having a lattice interval P = 137.5 mm are provided on a wall having a wall thickness d = 120 mm. Here, the conditions of the wall thickness d = 120 mm and the lattice spacing P = 137.5 mm are the conditions where the electromagnetic wave having the frequency of 2.45 GHz is shielded most in the simulation result of the first embodiment.

On the other hand, when the measurement result of FIG. 14 was seen, the electromagnetic wave with the frequency of 2.03 GHz was shielded most (transmission loss 30.2 dB). Therefore, the correction interval P _C for shielding the electromagnetic wave having the target frequency f _a (= 2.45 GHz) is calculated using the equation (11) described in the first embodiment.
P _C = λ _C × P / λ ₀
= 122.4 × 137.5 / 147.7 = 113.9 mm

Accordingly, FIG. 15 shows the measurement results of an experiment performed using a measurement sample in which the wall thickness d (= 120 mm) is kept as it is and the lattice interval P is 114 mm (= P _C ). Looking at this measurement result, a peak of electromagnetic wave shielding appears at a frequency near 2.50 GHz.
Therefore, by experimenting, it is possible to shield the electromagnetic wave (frequency f _a = 2.45 GHz) of the desired wireless LAN by correcting the lattice interval P to the correction interval P _C using Equation (11). Was also confirmed.
In addition, about the other structure and effect of Example 5, since it is substantially the same as that of the said embodiment or another Example, description is abbreviate | omitted.

  Hereinafter, in the sixth embodiment, a method for correcting a difference between a theoretical formula and a measurement result by the experiment by performing an experiment using a measurement sample simulating a door wall as in the fifth embodiment will be described. Note that the description of the same or equivalent parts as those described in the above embodiment mode or other examples will be described using the same terms or the same reference numerals.

Here, the relational expression (10) applied to the electromagnetic wave to be shielded (frequency f _a ) described in the above embodiment can be rewritten as the following general expression.
P = λ _a / (√ (A _e − (nλ _a / 2d) ² )) (19)
Here, A _e is a variable determined based on 1 or experiment. That is, Expression (10) shows a case where A _e = 1.

FIG. 16 is a graph in which A _e = 1 and the value calculated by the equation (19) are shown as curves as theoretical values, and the values measured using the measurement sample described in Example 5 are plotted as actual values. It is. From this result, it can be seen that there is a difference between the theoretical value and the actual measurement value in any order n.

FIG. 17 shows the result of changing A _e in equation (19) to the theoretical value so as to match the actual measurement value. Here, A _e was set to 2.3. From FIG. 17 (wall thickness d = 120 mm), it can be seen that the theoretical value and the measured value are in good agreement.

FIGS. 18 to 20 are diagrams comparing the measurement results of the experiments performed on the measurement samples with the wall thickness d changed to 130 mm, 110 mm, and 100 mm and the theoretical formulas. As can be seen from these figures, when A _e = 2.3, the theoretical value and the measured value are in good agreement at any wall thickness d.

By thus the partition body 1 of the grating pitch P is calculated by substituting variables A _e which is determined experimentally on the equation (19), making it possible to shield electromagnetic waves of a desired target frequency f _a it can.
In addition, about the other structure and effect of Example 6, since it is substantially the same as that of the said embodiment or another Example, description is abbreviate | omitted.

  The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to the embodiment and the example, and the design change is within a range not departing from the gist of the present invention. Are included in the present invention.

  For example, in the embodiments and examples described above, the electromagnetic wave propagated from the space R1 toward the space R2 has been described as an example. However, the present invention is not limited to this, and is propagated from the space R2 toward the space R1. In the case of targeting electromagnetic waves, the partition bodies 1, 5, and 6 may be arranged based on the same concept.

  Furthermore, in the said embodiment and Example, although the vertical tape 21 of the front side grating | lattice 2 has been arrange | positioned with respect to the horizontal tape 22 at the back side grating | lattice 3 side, it is not limited to this, The vertical tape 21 may be disposed on the space R1 side. Similarly, the vertical tape 31 of the rear lattice 3 may be arranged on the space R2 side with respect to the horizontal tape 32.

  1 and 11, the position of the horizontal tape 22 of the front lattice 2 and the position of the horizontal tape 32 of the rear lattice 3 are aligned at the same height. However, the present invention is not limited to this. Almost the same effect can be obtained even if the position in the up-down direction or the left-right direction perpendicular to the direction is shifted, so it is not necessary to arrange them.

Furthermore, in the said embodiment and Example, although the case where the front side grating | lattice 2, the rear side grating | lattice 3, and the intermediate | middle grating | lattice 53 were formed with a conductor tape was demonstrated, it is not limited to this, Conductors, such as metal powder You may form a conductor part by apply | coating the conductor coating material containing powder to a wall surface or the back surface of wallpaper in a grid | lattice form.
It is also possible to fill the printer with ink as a conductor paint, print a grid-like conductor portion with the conductor paint on one surface of the wallpaper, and simultaneously attach the conductor portion and the wallpaper to the wall surface. In addition, a conductor tape can be attached to one surface of the wallpaper in a lattice shape.

  Furthermore, a conductive adhesive containing a conductive powder such as metal powder can be applied to the wall surface in a lattice shape, and the wall surface can be covered with wallpaper or the like. In addition, you may form a conductor part by apply | coating a conductor adhesive on the back surface of wallpaper in a grid | lattice form.

[Cross-reference to related applications]
This application claims priority based on Japanese Patent Application No. 2012-107416 filed with the Japan Patent Office on May 9, 2012, the entire disclosure of which is fully incorporated herein by reference.

1 Partition 11 Front (first surface)
12 Rear surface (second surface)
2 Front grid (first conductor)
21 Vertical tape (band conductor)
22 Horizontal tape (band conductor)
23 Profile 3 Rear lattice (second conductor)
31 Vertical tape (strip conductor)
32 Horizontal tape (band conductor)
4 Concrete part (medium part)
5 Partition 51 Front (first surface)
52 Rear surface (second surface)
53 Intermediate lattice (third conductor)
531 Vertical tape (strip conductor)
532 Horizontal tape (band conductor)
6 Partition 61 Front (first surface)
611 Conductor tape (band conductor)
62 Rear surface (second surface)
621 Conductor tape (band conductor)
f _m , f _a target frequency λ _m , λ _a wavelength P, P ₁ lattice spacing (interval)
d Thickness d ₁ Distance w, w ₁ Tape width (width)

Claims (11)

A partition that is selectively set to attenuate or transmit electromagnetic waves of a target frequency propagated in a predetermined propagation direction,
A medium portion formed in a wall shape or a slab shape having the propagation direction as a thickness direction;
A plurality of first strip-shaped conductors and a first strip-shaped conductor disposed on the first surface in the thickness direction of the medium portion with a constant interval P in a direction substantially perpendicular to the thickness direction. A first conductor portion having a plurality of strip-shaped conductors arranged substantially perpendicularly and spaced apart from each other by a distance P, and formed in a substantially square grid of eyes;
A plurality of second belt-like conductors arranged on the second surface in the thickness direction of the medium portion at the same interval P in the same direction as the first belt-like conductor and the second belt-like conductors A second conductor portion having a plurality of strip-shaped conductors arranged substantially perpendicular to the conductor and spaced apart from each other by the interval P, and formed in a substantially square lattice.
When transmitting electromagnetic waves of the target frequency, the wavelength λ _m in the medium part, its order n (n is 0 or a positive integer), the width w of the strip conductor, and the thickness d of the medium part are d = nλ. _m / 2−2α × (Pw) −2βλ _m (where α = 0.158 ± 0.0333, β = −0.0280 ± 0.0169), and when the electromagnetic wave of the target frequency is attenuated, the medium The wavelength λ _{a in the section} , its order n (n is 0 or a positive integer), the thickness d of the medium section, and the interval P are P = λ _a / (√ (A _e − (nλ _a / 2d) ² )) of equation (a _e partition member, characterized in that the thickness d and the distance P of the medium portion is set based on the value that satisfies the variable) is determined based on one or experimental. 2. The partition according to claim 1, wherein the relational expression when the electromagnetic wave having the target frequency is attenuated is applied when λ _a / P is smaller than 1. 3. A constant interval P ₁ is set in each of the positions inside the medium part obtained by equally dividing the thickness d of the medium part by N (N is a positive integer of 2 or more) in a direction substantially perpendicular to the thickness direction. A plurality of third strip conductors arranged in a row and a plurality of strip conductors arranged at the interval P ₁ substantially perpendicular to the third strip conductor and formed in a substantially square grid. The partition body according to claim 1, further comprising a third conductor portion. 4. The partition body according to claim 3, wherein the interval P ₁ between the third conductor portions is set to ¼ or less of the wavelengths λ _m and λ _a in the medium portion. In the interval P, when a shift occurs in the target frequency that is the peak of the electromagnetic wave to be attenuated or transmitted, the wavelength λ _{C in} the air of the target frequency that is desired to be the peak and the frequency that is the peak in the interval P where the shift is generated. the wavelength lambda ₀ Metropolitan in the air, the correction interval P _C is calculated by _{P C = λ C × P /} λ 0, claims 1 to 4, characterized in that to correct the distance P to the correction interval P _C The partition according to any one of the above. 6. The partition according to claim 1, wherein a variable A _e of the relational expression when the electromagnetic wave of the target frequency is attenuated is 2.3. When the medium portion has a structure in which M layers are stacked in the thickness direction, the relative permittivity of the entire medium portion is assumed to be a relative permittivity ε _r (0), and the thickness d ( i) and the converted thickness d ′ (i) = d (i) × √ (ε _r (i) / ε _r (0)) of each layer calculated from the relative dielectric constant ε _r (i) of each layer is 1. The total converted thickness d ′ is calculated by integrating from the layer to the M-th layer, and the wavelength λ (0) = λ of the entire medium portion from the wavelength λ _{B in} air and the relative dielectric constant ε _r (0). _B / √ε _r (0) is calculated, and is calculated by substituting d ′ into d, λ (0) into λ _m or λ _a , and the provisional width w (0) of the strip conductor into w. The interval P is set as the provisional interval P (0).
The interval P (1) between the strip conductors of the first conductor portion is calculated by P (1) = P (0) × √ (ε _r (0) / ε _r (1)). The conductor interval P (M) is calculated by P (M) = P × √ (ε _r (0) / ε _r (M)), and the width w (1) of the first strip conductor is w (1). = W (0) × √ (ε _r (0) / ε _r (1)), and the width w (M) of the second strip conductor is w (M) = w (0) × √ (ε _r (0) / (epsilon) _r (M)), The partition body as described in any one of Claim 1 thru | or 6 characterized by the above-mentioned.   The partition according to any one of claims 1 to 7, wherein a part of the strip-shaped conductor has a deformed portion having a width different from the width w.   The said strip | belt-shaped conductor is formed using at least one material of either the conductor tape formed with a conductor, or the conductor paint or conductor adhesive containing conductor powder. The partition according to any one of 8.   The medium part is concrete, mortar, gypsum, wood, glass, acrylic, polycarbonate, polyethylene terephthalate, polyethylene, polystyrene, polypropylene, acrylonitrile butadiene styrene copolymer, ethylene tetrafluoride, paraffin, urethane, epoxy, vinyl chloride, silicon. The partition body according to any one of claims 1 to 9, wherein the partition body is formed using at least one material selected from the group consisting of bakelite, polystyrene foam, paper, and rubber. The partition according to any one of claims 1 to 10, wherein the partition is formed into a panel shape.

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