JP3141097B2 - Exterior wall panels - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer wall panel such as a curtain wall having electromagnetic shielding performance.

[0002]

2. Description of the Related Art The necessity of electromagnetic shielding of buildings, including intelligent buildings, is indispensable when personal portable devices to which radio technology is applied in buildings are used indoors within legally required frames. In addition, from the security of information, it is necessary to block radio waves of the frequency, that is, to prevent radiation and intrusion.

As an electromagnetic shield for a building structure, a soundproofing and heat insulating material having a metal film to be used on the outer wall surface is effective for shielding microwave bands even with a conventional product. It is said that effective electromagnetic shielding can be performed by adding a metal net.

Incidentally, the PC curtain wall is originally made of reinforced concrete and has a certain degree of electromagnetic shielding effect, and a metallic curtain wall such as an aluminum curtain wall exhibits sufficient electromagnetic shielding performance by itself.

Therefore, as an electromagnetic shielding structure of an outer wall using a PC curtain wall, for example, in Japanese Patent Publication No. Hei 7-16118, a conductive cushion material is used for an annular ring wound on a cubicle of the curtain wall. The entire outer wall surface using the curtain wall is configured as an electromagnetic shielding layer.

[0006]

However, in the conventional electromagnetic shielding technology in which an electromagnetic shielding layer is formed of such an iron plate, a metal mesh or a metal net, or a metal foil, it is necessary to uniformly perform electromagnetic shielding regardless of the frequency. For the purpose, in order to cut off invading radio waves from outside, pagers, mobile phones, F
It blocks even the radio waves of public important information such as broadcast waves such as M and radio.

Further, the metal plate, the metal net, and the metal mesh to be buried in these on-site construction walls must keep electrical contact with other members such as steel columns and beams for grounding in practical use.

[0008] In the case of an outer wall using a PC curtain wall or a metal curtain wall, it is necessary to take measures such as using a conductive cushion material as described above for connecting the curtain walls, which is troublesome. .

An object of the present invention is to eliminate the disadvantages of the prior art and to achieve electromagnetic shielding performance, it is possible to select only a radio wave of a required frequency and perform electromagnetic shielding. Therefore, there is no need to connect the panels to each other or to a steel column or the like via a conductive material, so that there is provided an outer wall panel which has a high degree of freedom of installation and requires no troublesome labor.

[0010]

In order to achieve the above object, the present invention firstly provides a small Y-shaped patterned linear linear antenna in consideration of the electromagnetic field absorption equivalent area of the antenna, and The ends extending in three directions are adjacent
The gist is that the linear antennas are regularly arranged so as to approach the center intersection .

Second, the linear antenna is composed of a plurality of types so as to cut off a plurality of frequencies, and the linear antenna can cut off two frequency bands of 1885 to 1950 MHz and 2420 to 2480 MHz. In addition, the gist of the present invention is that the linear antenna is a composite antenna formed by combining the first antenna with a Y-shaped antenna and the second antenna with a Y-shaped hollow frame character surrounding the first antenna. Is what you do.

According to the first aspect of the present invention, the patterned small antenna does not reflect electromagnetic wave energy only in the area of the antenna metal portion, but also has a reflection effect on an electromagnetic field near the antenna metal surface. Having. Also,
The absorbed electromagnetic field is absorbed as heat loss due to propagation in the linear antenna due to absorption loss, so that an electromagnetic shielding function can be easily obtained. In addition, by specifying the length of a small patterned linear antenna, it is possible to cut off a specific frequency and, as a result, allow other radio waves to pass, so that radio waves that require external information collection can be cut off. In addition, external leakage of radio waves used inside the building can be prevented, and security can be enhanced.

[0013] Further, because of the shielding effect due to the reflection loss and the absorption loss by the linear antenna, the antennas and the panel on which the antennas are arranged are connected to each other via a conductive material, or the metal sash of the window frame or the like is used. It is not necessary to conduct electricity to the steel column and the steel beam via the conductive material, and it can be set freely.

Further, the actual radio wave has a wave surface that is not horizontally aligned but has various inclinations. However, by making the linear antenna Y-shaped, it is possible to cope with radio waves having different inclinations other than radio waves on a horizontal plane.

According to the second aspect of the present invention, the patterned linear antenna can cut off a plurality of specific frequencies and can be more effective.

According to the third aspect of the present invention, there is further provided:
1885-1950MHz and 2420-2480MH
Specified to the two frequency bands of z, the digital cordless phone such as PHS and its data terminal and the wireless LAN are cut off by quasi-microwave, and other radio waves such as pager, mobile phone, FM, radio It does not attenuate radio wave services such as broadcast waves.

According to the fourth aspect of the present invention, a plurality of specific frequencies can be set by combining a Y-shaped antenna with a Y-shaped white frame character surrounding the Y-shaped antenna. Objects that can be blocked can be arranged on the same plane.

[0018]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows one of the outer wall panels of the present invention.
FIG. 2 is a perspective view showing the embodiment, and FIG.

The outer wall panel of the present invention is a PC curtain wall, which may be reinforced concrete, but in particular, a curtain wall made of fiber concrete such as glass, carbon or steel.

Small Y-shaped linear antennas 5 as a line pattern were regularly arranged on the surface of the outer wall panel 1 in consideration of the electromagnetic field absorption equivalent area of the antenna.

The method of periodically arranging the patterned small linear antennas 5 on the outer wall panel 1 is as follows: when the antenna is provided on the surface of the outer wall panel 1, when it is embedded inside, or when it is provided on the back side. Either may be used.

The illustrated example is an example in which the linear antennas 5 are particularly arranged on the surface.
It may be provided on a surface decorative material such as a tile. In any case, methods such as silk printing, pattern crimping, embedding by fitting a mold, and attaching a film can be considered.

Among these, when the film is attached, a film formed by etching, laminating, or screen printing a linear antenna 5 as a line pattern on a synthetic resin film such as a polyimide film, a polyester film, or a polyethylene film. Paste.

The etching method is the same as a general printed circuit board in which a film serving as a flexible board and a copper foil adhered thereto are used as a base material, the pattern portion is masked, and the remaining portion is dissolved with a solvent. . On the other hand, the screen printing method forms a line pattern by printing a metal paste such as silver, copper, or gold on a base material.

In the case where the linear antenna 5 is provided on the front surface or the rear surface of the outer wall panel 1, a cover film or a coating may be applied on the linear antenna 5 in some cases.

First, the basic principle related to the present invention will be described. As shown in FIG. 2, when the conductor piece 3 is in the air, when a radio wave is incident on this surface, one part passes and another reflects. As shown in FIG. 3, the attenuation of the transmitted wave in this case passes through the 4,6 GHz band but does not pass through the 12,14 GHz band. Such characteristics differ depending on the shape of the conductor piece 3.

If the conductor piece 3 is a linear antenna (dipole) which is linear, a part of the absorbed (received power) is re-emitted, and 1/4 of the power is a linear antenna (conductor).
Is absorbed as heat loss.

As shown in FIGS. 4 and 5, a half-wavelength (1/2) linear antenna placed parallel to a plane magnetic field is not limited to the area of the metal part of the antenna receiving electromagnetic wave energy. It absorbs the electromagnetic field near the surface. Although the spread is not uniform, the calculated value of the equivalent area Ae is expressed by the following equation 1.

[0029]

[Equation 1] Ae ≒ 0.13λ ²

When such linear antennas 4 are arranged on the outer wall panel 1 as shown in FIG. 5 according to the equivalent area Ae, the same effect as if a metal plate or a metal net is stuck is exhibited.

By the way, 1885 to 1950 MHz is the current personal communication (PHS-JAPAN., PCS-US. DECT-Europe) and FPLMTS (Future Public Land) which will be put into practical use from the year 2000.
Mobile Telephone System), 2420
Up to 2480 MHz is the ISM (Industrial-Sci
entific-Medical --- Industrial, scientific, medical) frequencies are allocated to wireless LANs in buildings, and are also used in microwave ovens and high-power linear accelerators for nondestructive testing.

In the case of PHS, the wavelength is λ = 153 mm,
In the case of AN, since λ = 122 mm, each linear antenna 4 has an area Ae = 3043 mm ² atPHS, Ae = 1935 mm
This corresponds to ^{2 at} LAN, which may be scattered in the board body 1 in consideration of the electromagnetic field absorption equivalent area Ae.

However, in the case where the linear antennas 4 are arranged in a horizontal line as shown in FIG. 5, it is impossible to cope with the fact that the wavefront of the actual radio wave has various inclinations instead of the horizontal line. Therefore, in this embodiment, the linear antennas 5 are Y-shaped as shown in FIG. 6, and are arranged such that the ends extending in three directions approach the center intersection of the adjacent linear antennas 5.

The reason why the shape is Y-shaped in this way is to cope with the polarization plane of the radio wave.
Regardless of the inclination of the wave surface of the radio wave, it resonates with any of the surfaces, so that it is possible to cope with radio waves having different inclinations other than the horizontal surface radio wave.

In addition, the linear antenna 5 is 1885 to 1950 MH
If the panel 1 has different lengths so as to block the two frequency bands of z and 2420 to 2480 MHz, other pagers (275 to 364 MHz),
Mobile phones (810-940 MHz, 1477-1501 MHz), F
M broadcast (76 to 90 MHz), medium wave radio broadcast (526 to 1600)
(kHz) and so on.

As another embodiment, as shown in FIG.
A Y-shaped first linear antenna 5a of λ / (4 辺 ε) of 2450 MHz on one side and a thin copper wire (0.2φ) of λ / √ε of 1950 MHz surrounding the ring as a white frame character surrounding the ring. A composite linear antenna 5 may be formed in combination with the Y-shaped second linear antenna 5b. The reason why the shape is made Y-shaped is to cope with the polarization plane of the radio wave, and the first linear antenna 5a and the second linear antenna 5b are used.
Is combined to correspond to two frequencies.

As described above, it is required that the first linear antenna 5a and the second linear antenna 5b do not directly intersect as shown in FIG. 7, but a non-conductive layer such as a non-conductive film is required. If they are interposed, they can be arranged so as to be overlapped vertically.

Although the above embodiment has been described with reference to the case of a PC curtain wall, an electromagnetic shielding effect can be obtained by arranging the linear antennas 5 similarly in the case of other mirror glass curtain walls, etc. In the case of a curtain wall having the above-mentioned opening, if a linear antenna 5 is similarly arranged on a window glass, an electromagnetic shielding effect can be obtained on the entire surface.

[0039]

As described above, the outer wall panel of the present invention can perform electromagnetic shielding by selecting only radio waves of a required frequency when exhibiting electromagnetic shielding performance. There is no need to electrically connect to each other or to a steel column or the like via a conductive material, so that troublesome labor is not required, the degree of freedom of installation is high, and electromagnetic shielding can be easily provided.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of an outer wall panel of the present invention.

FIG. 2 is a perspective view showing the principle of electromagnetic shielding of a board having the electromagnetic shielding performance of the present invention.

FIG. 3 is a graph showing an example of a frequency response in the case of FIG. 2;

FIG. 4 is an explanatory diagram when a conductor is a linear antenna (dipole).

FIG. 5 is a front view of a panel on which a linear antenna is arranged.

FIG. 6 is a partial front view showing an embodiment of the outer wall panel of the present invention.

FIG. 7 is a front view showing an example of a composite linear antenna.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Outer wall panel 3 ... Conductor piece 4 ... Linear antenna 5 ... Linear antenna 5a ... 1st linear antenna 5b ... 2nd linear antenna

────────────────────────────────────────────────── ─── Continuing on the front page (72) Yoshimasa Yoshida 1-35-1 Awaza, Nishi-ku, Osaka-shi, Osaka Prefecture Kashima Construction Co., Ltd. Kansai Branch (72) Inventor Kazushi Yamanoue 1-3-3 Awaza, Nishi-ku, Osaka-shi, Osaka No. 15 Kashima Construction Co., Ltd.Kansai Branch (72) Inventor ▲ Taka ▼ Shuichi Sakaichi 2-9-1-1, Kashima Construction Co., Ltd.Kashima Construction Co., Ltd.Technical Research Institute (72) Inventor Junichi Hirai 2-19-1, Kashima Construction Co., Ltd.Technical Research Laboratories (72) Inventor Minoru Nakayama 2-9-1-1, Kashima Construction Co., Ltd.Kashima Construction Co., Ltd.Technology Research Laboratories Kashima Construction Co., Ltd., 1-2-7 Moto-Akasaka, Ward (72) Inventor Yoshikiyo Sato 1-3-15 Awaza, Nishi-ku, Osaka-shi, Osaka Kashima Construction Corporation Kansai Branch (56) References JP-A-8-274538 (JP, A) JP-A-63-141398 (JP, A) JP-A-5-280116 (JP, A) Jpn. (JP, U) Special Table Hei 8-503580 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04B 1/92 H05K 9/00

Claims (4)

(57) [Claims] 1. A small Y-shaped patterned linear antenna is formed by taking into account the electromagnetic field absorption equivalent area of the antenna, and having three ends extending in a linear shape adjacent to each other.
An outer wall panel , which is regularly arranged so as to approach the center intersection of the antenna . 2. The outer wall panel according to claim 1, wherein a plurality of linear antennas are provided so as to cut off a plurality of frequencies. 3. The outer wall panel according to claim 1, wherein the linear antenna can cut off two frequency bands of 1885 to 1950 MHz and 2420 to 2480 MHz. 4. The linear antenna according to claim 1, wherein the first antenna is a Y-shaped antenna, and the second antenna is a composite antenna formed by combining the first antenna with a Y-shaped outline character surrounding the second antenna. An outer wall panel according to claim 3.