JP7571455B2 - Decorative sheet and its attachment structure - Google Patents

Description

The present invention relates to decorative sheets (wallpaper, etc.) and their attachment structures. In particular, the present invention relates to technology suitable for installing antennas in closed spaces in indoor transmission systems such as local 5G.

One example of a local 5G-compatible indoor transmission system is the technology described in Patent Document 1. Patent Document 1 describes an in-facility transmission system that is arranged in a facility having multiple closed spaces, which includes a parent base station that performs wireless communication with an external base station, and a child base station that is arranged in a closed space different from the closed space in which the parent base station is installed and performs wireless communication with the parent base station. Patent Document 1 also describes that the parent base station and the child base station are connected via a radio wave waveguide that reduces the propagation loss of radio waves in the wireless communication.

JP 2018-207184 A

In the above conventional technology, in order to support local 5G, it is necessary to install a base station in each room. Therefore, a child base station is set in the room, but this child base station causes problems in terms of the aesthetics of the room and the concealment of the child base station. For example, if the child base station is concealed, there is a risk of radio wave attenuation, and there is a risk that it will not be possible to support local 5G.
The present invention has been made in consideration of the above-mentioned points, and aims to provide a decorative sheet equipped with a planar antenna that is also compatible with local 5G without spoiling the aesthetic appearance of the room.

To solve the problem, one aspect of the present invention is a decorative sheet having a pattern layer on the surface side, incorporating a microstrip antenna, the antenna radiating element of which is an antenna pattern arranged along the plane of the decorative sheet.
In addition, the decorative sheet of this embodiment of the present invention comprises a resin substrate constituting a dielectric substrate, a metal layer formed on the back side of the resin substrate and constituting a ground conductor plate, an antenna layer having a radiating element formed on the front side of the resin substrate, and a pattern layer formed on the front side of the antenna layer, wherein the radiating element is an antenna pattern arranged along the plane of the resin substrate.

In addition, the decorative sheet of this embodiment of the present invention comprises a resin substrate constituting a dielectric substrate, a metal layer formed on the back side of the resin substrate constituting a ground conductor plate, a radiating element embedded in the resin substrate, and a pattern layer formed on the front side of the resin substrate, and the radiating element is an antenna pattern extending along the plane of the resin substrate.
Another aspect of the present invention is a decorative sheet attachment structure in which a plurality of decorative sheets having the above-described configuration are attached to a wall, and each decorative sheet has a coupler portion that electrically connects the antennas of the decorative sheets.

According to an aspect of the present invention, an antenna that is also compatible with local 5G can be installed indoors without spoiling the aesthetic appearance of the room, simply by attaching a decorative sheet to the wall.
Furthermore, by using a microstrip antenna as the planar antenna, it is possible to provide the decorative sheet with a certain degree of flexibility while ensuring a large-area antenna section (radiating element) that is compatible with local 5G.

FIG. 1 is a cross-sectional view illustrating a decorative sheet according to an embodiment of the present invention. FIG. 4 is a cross-sectional view illustrating a decorative sheet according to a second embodiment of the present invention. FIG. 4 is a cross-sectional view showing another example of the decorative sheet. 1B is a diagram showing an example of an antenna pattern of a radiating element and FIG. 1A is a diagram showing an example of a design of a design layer. 1B is a diagram showing an example of an antenna pattern of a radiating element and FIG. 1A is a diagram showing an example of a design of a design layer. 1B is a diagram showing an example of an antenna pattern of a radiating element and FIG. 1A is a diagram showing an example of a design of a design layer. 1B is a diagram showing an example of an antenna pattern of a radiating element and FIG. 1A is a diagram showing an example of a design of a design layer. FIG. 1 is a diagram showing an example of a structure in which multiple decorative sheets of the present embodiment are attached to a wall. FIG. 13 is a diagram showing an example of a decorative sheet installed in a room.

Next, an embodiment of the present invention will be described with reference to the drawings.
In addition, the same components are given the same reference numerals unless there is a reason for convenience. In addition, in each drawing, the thickness and ratio of the components may be exaggerated for ease of viewing, and the number of components may be reduced. In addition, the present invention is not limited to the following embodiments, and can be embodied by appropriate combinations and modifications without departing from the spirit and scope of the present invention.

"First embodiment"
A decorative sheet 1 according to a first embodiment will be described.
1, the decorative sheet 1 of this embodiment has a planar antenna formed by forming an antenna layer 12 on the front surface of a resin substrate 10 and a metal layer 11 on the back surface of the resin substrate 10. The planar antenna of this embodiment is, for example, a microstrip antenna.

The metal layer 11 also serves to block radio wave interference from outside when the decorative sheet 1 is attached to an indoor wall 20 .
Furthermore, in the decorative sheet 1 of this embodiment, a release paper (not shown) is provided on the rear surface of the metal layer 11 via a first adhesive layer 13. Fig. 1 illustrates a state in which the release paper has been peeled off and the decorative sheet 1 is attached to a wall 20. The same is true for the other cross-sectional views.
In addition, in the decorative sheet 1 of this embodiment, a design layer 15 is formed on the antenna layer 12 with a second adhesive layer 14 interposed therebetween.
Here, the first adhesive layer 13 does not necessarily have to be present on the back side of the decorative sheet 1. In other words, the decorative sheet 1 may be attached on-site with an adhesive. In this case, it is preferable that the decorative sheet 1 has a resin layer such as a back primary layer provided on the back side of the metal layer 11.

<Metal layer 11>
The metal layer 11 is made of, for example, a metal foil or a thin metal plate.
Examples of materials for the metal foil include silver, silver alloys, copper, copper alloys, stainless steel, nickel, nickel alloys, aluminum, aluminum alloys, titanium, and titanium alloys.
The surface of the metal foil may be formed with an anti-rust layer (such as an oxide film of chromate or the like), a heat-resistant layer, or the like. The surface of the metal foil may also be treated with a silane coupling agent. The ten-point average roughness of the surface of the metal foil is preferably 0.2 to 2.5 μm. In this case, the adhesion between the metal foil and the resin substrate 10 is good, and the transmission characteristics are excellent. The metal layer 11 may also be composed of two or more layers of metal foil.

The thickness of the metal layer 11 is, for example, 2 μm or more and 30 μm or less.
<Resin substrate 10>
The resin substrate 10 is made of a resin material with low dielectric loss.
The material constituting the resin substrate 10 is, for example, a resin material containing a TFE-based polymer as a main component. The main component refers to a material containing, for example, 80 to 100% by mass of the TFE-based polymer.
The TFE-based polymer is, for example, a polymer having a unit based on tetrafluoroethylene (TFE) (hereinafter, also referred to as "TFE unit"). The TFE-based polymer may be a homopolymer of TFE, or may be a copolymer of TFE and another monomer (comonomer) copolymerizable with TFE. The TFE-based polymer preferably has 90 to 100 mol% of TFE units with respect to all units constituting the polymer. The fluorine content of the TFE-based polymer is preferably 70 to 76 mass%, more preferably 72 to 76 mass%.

Examples of TFE-based polymers include polytetrafluoroethylene (PTFE), copolymers of TFE and ethylene (ETFE), copolymers of TFE and propylene, copolymers of TFE and perfluoro(alkyl vinyl ether) (PAVE) (PFA), copolymers of TFE and hexafluoropropylene (HFP) (FEP), copolymers of TFE and fluoroalkylethylene (FAE), and copolymers of TFE and chlorotrifluoroethylene (CTFE). The copolymers may further contain units based on other comonomers.

<Antenna Layer 12>
The antenna layer 12 has a radiating element 12A.
The radiating element 12A is formed on the surface of the resin substrate 10 in a preset antenna pattern.
The antenna layer 12 may have a protective layer formed on the surface of the resin substrate 10 to protect (seal) the radiating element 12A.
The radiating element 12A may be, for example, a conductive ink, a wire, or a thin metal plate.
When the radiating element 12A is made of conductive ink, it is formed by printing a preset antenna pattern on the surface of the resin substrate 10 using conductive ink.
The conductive ink contains, for example, silver paste, silver nanoparticles, copper nanoparticles, CNTs, or the like as a conductive material.
Furthermore, when the radiating element 12A is made of wire, the wire is arranged in a grid (mesh) shape on the surface of the resin substrate 10 so as to form a preset antenna pattern.

When the radiating element 12A is made of a metal plate, a metal layer is formed on the surface of the resin substrate 10, and the metal layer is etched into a preset antenna pattern to form the radiating element 12A made of a metal plate (metal foil). Alternatively, the radiating element 12A is formed by attaching a metal plate etched into an antenna pattern to the surface of the resin substrate 10.
Alternatively, the radiating element 12A (series-parallel feed side array) in which the radiating element bodies 12Aa are connected in series is formed on a film, and the film is attached to the surface of the resin substrate 10 to form the radiating element 12A. The film may be the resin substrate 10.

<Pattern Layer 15>
The pattern layer 15 is made of a decorative sheet 1 (wallpaper) having a pattern 15b printed on the surface of a sheet base material 15a.
The decorative sheet 1 is attached to the surface of the antenna layer 12 via a second adhesive layer 14 .
In the case where the antenna layer 12 has a protective layer, the design layer 15 may be formed by directly printing on the protective layer. In this case, the second adhesive layer 14 is not required.
The sheet base material 15a is, for example, a sheet-like layer having moisture-proof properties. Moisture-proof properties are properties that make it difficult for water vapor to pass through. For example, moisture-proof paper having two paper base materials and a moisture-proof resin layer arranged between the two paper base materials can be used as such a sheet base material 15a. For example, a paper-reinforced paper containing resin between cellulose fibers can be used as the paper base material. For example, the paper-reinforced paper preferably contains 50% by mass or more of cellulose fibers. The thickness of the paper-reinforced paper is, for example, 15 μm or more and less than 60 μm. The basis weight of the paper base material on the front side of the sheet base material 15a is 30 g/m ² , and the basis weight of the paper base material on the back side is 23 g/m ² .

The moisture-proof resin layer is a layer made of moisture-proof resin that does not allow water vapor to pass through. As the moisture-proof resin, for example, a thermoplastic resin such as an olefin resin having a melting point of 100° C. or more and less than 200° C. is preferable. The thickness of the moisture-proof resin layer is, for example, 20 μm or more and less than 70 μm. In this case, as shown in FIG. 3( a ), the sheet base material 15 a also serves as the moisture-proof layer 17.
In the present embodiment, moisture-proof paper is used as the sheet base material 15a, but other configurations may be used, for example, a moisture-proof resin film may be used.

However, from the viewpoint of suppressing attenuation of radio waves to the antenna, the sheet substrate 15a is preferably a single-layer film such as a PTFE-based polymer, a fluorinated polyimide resin, a liquid crystal polymer (LCP), a cycloolefin polymer (COP), or an ArFRP (aramid fiber reinforced plastic), or a laminate film combining multiple films, or a single-layer or multiple-layer laminate film made of a material that is a blend of multiple of the above materials.

The sheet base material 15a may be made of a single sheet of paper base material.
The pattern 15b is a printed layer formed by printing on the sheet base material 15a, and imparts design to the decorative sheet 1. As the pattern 15b, for example, a pattern 15b suitable for the location where the decorative sheet 1 is used, such as wood grain, cork, stone grain, tile, pottery, or an abstract pattern, can be selected.
A moisture-proof layer 17 made of a moisture-proof resin film such as a PEN film, or a PET or nylon film with alumina or silica vapor-deposited thereon may be provided on the design layer 15 (see FIG. 3(b)). Instead of providing such a film, the moisture-proof layer 17 may be formed by vapor-depositing alumina or silica directly on the design layer 15, and then providing an overcoat layer on the vapor-deposited layer by wet coating.

The moisture-proof layer 17 formed on the pattern layer 15 is made of a transparent or semi-transparent material (resin) that allows the pattern 15b to be seen through. Instead of providing the moisture-proof layer 17, an EVAL-based resin having excellent water barrier properties may be used as the second adhesive layer 14.
In addition to the moisture-proof layer 17, a surface protective layer may be provided on the pattern layer 15 to cover the entire pattern layer 15. The surface protective layer is made of a transparent or semi-transparent material (resin) that allows the pattern 15b to be seen through. A preferable material is, for example, a thermosetting resin.
Providing a waterproof function makes it possible to suppress corrosion of the antenna and fluctuations in the resonant frequency due to water intrusion.
In addition, a hard coat layer or the like may be provided to ensure scratch resistance, and a cushion layer may be provided separately to prevent short circuits between the top and bottom. The cushion layer is made of a rubber material such as urethane, silicone rubber, or fluororubber.

<First adhesive layer 13, second adhesive layer 14>
The adhesive constituting the first adhesive layer 13 and the second adhesive layer 14 may be any known adhesive used for wallpaper.
It is preferable to use a resin material with low dielectric loss for the second adhesive layer 14. For example, it is preferable to use an adhesive film made of modified polyimide or the like as the second adhesive layer 14 formed on the front surface side of the resin substrate 10. .
Here, a heat-peelable adhesive may be used as the second adhesive layer 14 to which the pattern layer 15 is attached. In this case, by applying heat to the surface of the decorative sheet 1, the antenna function can be removed without changing. The pattern layer 15 constituting the wallpaper can be peeled off and replaced with another wallpaper (pattern layer 15).

Second Embodiment
The decorative sheet 1 of the second embodiment will now be described.
The basic configuration of the decorative sheet 1 of the second embodiment is similar to that of the first embodiment.
However, the second embodiment differs from the first embodiment in that, as shown in Fig. 1, there is no independent antenna layer 12, and a radiating element 12A is embedded in a resin substrate 10. The rest is basically the same as the first embodiment, so only the differences will be described.

In the second embodiment, the second adhesive layer 14 is not provided, but may include the second adhesive layer 14. In addition, the adhesive layer 16 is provided between the metal layer 11 and the resin substrate 10, but the adhesive layer 16 may not be provided.
In this example, for example, a mesh body (radiating element 12A) made of a conductive material is embedded in the resin substrate 10, thereby embedding the radiating element 12A of a predetermined antenna pattern in the resin substrate 10.
Alternatively, the radiating element 12A having a predetermined antenna pattern is embedded in the resin substrate 10 by casting.
The material of the radiating element 12A may be a wire, conductive paper fiber, CNF/SCNF, etc. Alternatively, a metal plate (metal foil) serving as the radiating element 12A formed into an antenna pattern shape by etching may be embedded in the resin substrate 10.
Examples of conductive papermaking fiber materials include metal fibers such as copper and aluminum fibers, and carbon fibers.

"About antenna patterns"
An example of an antenna pattern formed by the radiating element 12A will be described below.
<First pattern example>
The first pattern example is configured from a mesh body (such as a wire net) in which linear metal bodies are arranged in a mesh (lattice) shape, as shown in Fig. 4(b). This pattern example can be produced, for example, from a wire grid or a wire net-like mesh body (metal plate) formed by printing ruled lines with conductive ink, etching, or the like.
It is preferable that the meridians and latitudes of the mesh are parallel or approximately parallel to the extending direction of the end face of the decorative sheet 1 .

<Second pattern example>
In the second pattern example, as shown in Fig. 5(b), the radiating element 12A has a plurality of radiating element bodies 12Aa arranged in the vertical and horizontal directions. The radiating element bodies 12Aa arranged in the vertical direction are electrically connected in series in the vertical direction, and the radiating element bodies 12Aa arranged in the horizontal direction are electrically connected in series in the horizontal direction.
That is, the radiating element 12A is a mesh of linear metal bodies, with the mesh openings forming the radiating element body 12Aa. The radiating element body 12Aa is made of a metal plate having a predetermined area. In the figure, a rectangular radiating element body 12Aa is shown as an example.

<Third pattern example>
In the third pattern example, as shown in Fig. 6(b), the radiating element 12A is configured by arranging a plurality of radiating element bodies 12Aa in the vertical and horizontal directions, and the radiating element bodies 12Aa arranged in the vertical direction are electrically connected in series. That is, the antenna pattern is formed by arranging a plurality of blind-shaped arrays in the horizontal direction, each of which is made up of radiating element bodies 12Aa arranged in the vertical direction and electrically connected in series.
Here, the antenna pattern examples are not limited to the above-mentioned pattern examples. For example, other pattern examples may be used as long as the antenna pattern is applied to an antenna pattern (microstrip antenna) consisting of a plurality of radiating element bodies 12Aa and a power supply circuit for exciting the same.

"About picture 15b"
Examples of the design 15b are shown in Figs. 4(a), 5(a) and 6(a).
In this case, as part of the pattern 15b of the pattern layer 15, a marking pattern 21 may be provided for specifying the cutting positions where the mesh is removed or the cutting positions between adjacent radiating element bodies 12Aa in the horizontal direction.
The marking pattern 21 does not need to be a line, and may be a specific picture displayed at a specific interval. The marking pattern 21 may be provided at a position overlapping the mesh opening or the radiating element body 12Aa.
When the radiating element 12A is made of a mesh, it can be cut at any desired position, and this is preferable as the radiating element 12A for the decorative sheet 1.

"Regarding the placement position of the radiating element 12A"
The antenna pattern of the radiating element 12A may be disposed over the entire surface of the decorative sheet 1 in plan view, but as shown in Fig. 7, the arrangement position H of the radiating element 12A may be disposed toward the center in plan view, with a cut margin for the end of the decorative sheet 1 being provided to the left and right lateral directions and downward. The cut margin is, for example, 5 cm to 20 cm wide.
In this case, it is preferable to have an end marking pattern 22 that specifies the boundary between the arrangement position H of the radiating element 12A and the non-arrangement position as part of the pattern 15b of the pattern layer 15. In this case, the cuttable position of the end of the decorative sheet 1 becomes easy to understand, and the cutting allowance can be easily adjusted on site.
In FIG. 7, the reason why no cut margin is provided on the upper surface is that a connection portion (not shown) for a coaxial cable or the like is to be formed in advance.

"Example of use of decorative sheet 1 (attaching structure)"
The decorative sheet 1 of this embodiment is used by, for example, attaching a plurality of sheets along the surface of a wall 20 inside a room, as shown in Fig. 8. In Fig. 8, reference numeral 30 denotes a coupler portion. The coupler portion is a device that electrically connects the antenna (radiating element 12A and metal layer 11 (ground conductor plate)) of each decorative sheet 1 with a coaxial cable or the like, and links to a child base station (wireless router) 32 provided outside the room, as shown in Fig. 9. In the example of Fig. 9, reference numeral 31 denotes a coaxial cable, reference numeral 33 denotes an optical cable fiber, and reference numeral 34 denotes an electric cable.

In FIG. 9, the decorative sheet 1 of this embodiment is applied to only one decorative sheet 1, but the decorative sheet 1 of this embodiment may be applied to a plurality of appropriately selected wall 20 surface positions (panel positions).
The decorative sheet 1 of the present embodiment may be attached to a ceiling surface, a partition surface, or the like, other than the wall surface 20 inside the room. As long as the surface position allows electrical connection to a child base station (wireless router), it is not limited to a wall surface that defines a closed space.
Furthermore, the basic configuration of the transmission system within the facility may be the system configuration described in Patent Document 1, etc., except for the antenna section.

"Action, effect, etc."
In this embodiment, by attaching the decorative sheet 1 to a wall surface, it is possible to easily install a local 5G compatible antenna indoors, etc.
In addition, in this embodiment, by adopting a planar antenna, it becomes possible to embed a large-area antenna within the decorative sheet 1, making it possible to support local 5G.
Furthermore, among planar antennas, if the radiating element 12A is made into a mesh body or a microstrip antenna consisting of multiple radiating element bodies 12Aa is adopted, depending on the antenna pattern, it is possible to maintain the flexibility of the decorative sheet 1 even if the antenna is embedded in the decorative sheet 1.

The metal layer 11 also has a function of preventing radio wave interference from outside. The metal layer 11 may be configured as a two or more layer structure with an insulating layer sandwiched therebetween, and the metal layer on the back side may not be connected to a coaxial cable (does not constitute an antenna). In this case, the metal layer on the back side may be configured as a mesh body, for example, to suppress adverse effects on flexibility.
Furthermore, by providing a marking pattern 21 or the like, it becomes easier to select the optimum cutting position when cutting the decorative sheet 1 on-site.

Furthermore, by using a known heat-peelable adhesive as the material for the second adhesive layer 14, after the decorative sheet 1 has been attached, it is possible to replace it with any desired pattern layer (wallpaper) without changing the position of the antenna function.
In addition, since the antenna unit is made of wallpaper when placed indoors, it is also possible to place the child base station (wireless router) outside.
The actions and effects described in this specification are merely examples and are not limiting, and there may be effects other than those described in this specification.
The present disclosure can also be configured as follows.

"others"
(1) The decorative sheet 1 of this embodiment is a decorative sheet 1 having a pattern layer 15 on the surface side, and has a built-in microstrip antenna, the radiating element 12A of the antenna being an antenna pattern arranged along the surface of the decorative sheet 1.
(2) In addition, the decorative sheet 1 of this embodiment comprises a resin substrate 10 constituting a dielectric substrate, a metal layer 11 formed on the back side of the resin substrate 10 and constituting a ground conductor plate, an antenna layer 12 having a radiating element 12A formed on the front side of the resin substrate 10, and a pattern layer 15 formed on the front side of the antenna layer 12, and the radiating element 12A is an antenna pattern arranged along the plane of the resin substrate 10.

(3) In this case, for example, the radiating element 12A is made of at least one of conductive ink, a wire, and a metal plate.
(4) In addition, the decorative sheet 1 of this embodiment comprises a resin substrate 10 constituting a dielectric substrate, a metal layer 11 formed on the rear side of the resin substrate 10 and constituting a ground conductor plate, a radiating element 12A embedded in the resin substrate 10, and a pattern layer 15 formed on the front side of the resin substrate 10, and the radiating element 12A is an antenna pattern extending along the plane of the resin substrate 10.
(5) In this case, for example, the radiating element 12A is formed of any one of a metal plate, conductive papermaking fiber, CNF, and SCNF.

(6) The metal plate has, for example, a mesh-like antenna pattern shape.
In addition, the radiating element 12A may be in the form of a mesh-like antenna pattern, and may have, as part of the pattern 15b of the pattern layer 15, a marking pattern 21 for identifying a cutting position that is different from the mesh openings.
(7) Furthermore, the radiating element 12A may be configured such that a plurality of radiating element bodies 12Aa are arranged along the vertical and horizontal directions, and at least the radiating element bodies 12Aa arranged in the vertical direction are electrically connected in series to form an antenna pattern.

(8) Also, a configuration may be adopted in which a marking design 21 is provided as a part of the design 15b of the design layer 15, for specifying the cutting position between adjacent radiating element bodies 12Aa in the horizontal direction.
The radiating element 12A may be arranged at least closer to the center than both ends of the pattern layer 15 in the width direction in a plan view.
(9) In addition, a configuration may be adopted in which an end marking pattern 22 is provided as part of the pattern 15b of the pattern layer 15, for identifying the boundary between the arrangement position and the non-arrangement position of the radiating element 12A.

(10) Furthermore, the pattern layer 15 may have a sheet base material 15a and a printed layer 15b formed by printing a pattern on the surface of the sheet base material 15a, and the pattern layer 15 may be attached via a heat-peelable adhesive layer.
Moreover, a moisture-proof layer 17 having a barrier property against moisture may be provided above the position where the radiating element 12A is disposed.
(11) This embodiment is also a decorative sheet 1 attachment structure in which a plurality of the decorative sheets 1 described above are attached to a wall 20 and each decorative sheet 1 has a coupler portion that electrically connects the antennas of the decorative sheets 1 .
(12) Furthermore, this embodiment is an attachment structure for the decorative sheet 1, in which the decorative sheet 1 described above is attached to a wall 20, and the antenna of the decorative sheet 1 is electrically connected to a base station installed outside a room having the wall 20.

REFERENCE SIGNS LIST 1: decorative sheet 10: resin substrate 11: metal layer 12: antenna layer 12A: radiating element 12Aa: radiating element body 15: pattern layer 15a: sheet base material 15b: pattern 16: adhesive layer 17: moisture-proof layer 20: wall 21: marking pattern 22: end marking pattern 30: coupler section 32: child base station (wireless router)
H. Position

Claims (18)

A decorative sheet having a pattern layer on the front side,
Built-in microstrip antenna
The radiating element of the antenna is an antenna pattern arranged along the surface of the decorative sheet ,
The radiating element has a mesh-like antenna pattern shape,
A marking pattern for identifying a cutting position that is different from the mesh position is provided as a part of the pattern of the pattern layer.
Decorative sheet. A decorative sheet having a pattern layer on the front side,
Built-in microstrip antenna
The radiating element of the antenna is an antenna pattern arranged along the surface of the decorative sheet ,
The radiating element has an antenna pattern in which a plurality of radiating element bodies are arranged along the vertical and horizontal directions, and at least the radiating element bodies arranged in the vertical direction are electrically connected in series,
As a part of the pattern of the pattern layer, a marking pattern is provided for identifying a cutting position between adjacent radiating element bodies in the horizontal direction.
Decorative sheet. A decorative sheet having a pattern layer on the front side,
Built-in microstrip antenna
The radiating element of the antenna is an antenna pattern arranged along the surface of the decorative sheet ,
The radiating element is disposed at least closer to the center than both ends in the width direction of the pattern layer in a plan view.
Decorative sheet. A resin substrate constituting a dielectric substrate;
a metal layer formed on the rear surface of the resin substrate and constituting a ground conductor plate;
an antenna layer having a radiating element formed on a front side of the resin substrate;
A pattern layer formed on the front side of the antenna layer,
the radiating element is an antenna pattern disposed along a plane of the resin substrate,
The radiating element has a mesh-like antenna pattern shape,
A marking pattern for identifying a cutting position that is different from the mesh position is provided as a part of the pattern of the pattern layer.
A decorative sheet characterized by: A resin substrate constituting a dielectric substrate;
a metal layer formed on the rear surface of the resin substrate and constituting a ground conductor plate;
an antenna layer having a radiating element formed on a front side of the resin substrate;
A pattern layer formed on the front side of the antenna layer,
the radiating element is an antenna pattern disposed along a plane of the resin substrate,
The radiating element has an antenna pattern in which a plurality of radiating element bodies are arranged along the vertical and horizontal directions, and at least the radiating element bodies arranged in the vertical direction are electrically connected in series,
As a part of the pattern of the pattern layer, a marking pattern is provided for identifying a cutting position between adjacent radiating element bodies in the horizontal direction.
A decorative sheet characterized by: A resin substrate constituting a dielectric substrate;
a metal layer formed on the rear surface of the resin substrate and constituting a ground conductor plate;
an antenna layer having a radiating element formed on a front side of the resin substrate;
A pattern layer formed on the front side of the antenna layer,
the radiating element is an antenna pattern disposed along a plane of the resin substrate,
The radiating element is disposed at least closer to the center than both ends in the width direction of the pattern layer in a plan view.
A decorative sheet characterized by: 7. The decorative sheet according to claim 4 , wherein the radiating element is composed of at least one of a conductive ink, a wire, and a metal plate. A resin substrate constituting a dielectric substrate;
a metal layer formed on the rear surface of the resin substrate and constituting a ground conductor plate;
A radiating element embedded in the resin substrate;
A pattern layer formed on the front side of the resin substrate,
the radiating element is an antenna pattern extending along a plane of the resin substrate ,
The radiating element has a mesh-like antenna pattern shape,
A marking pattern for identifying a cutting position that is different from the mesh position is provided as a part of the pattern of the pattern layer.
A decorative sheet characterized by: A resin substrate constituting a dielectric substrate;
a metal layer formed on the rear surface of the resin substrate and constituting a ground conductor plate;
A radiating element embedded in the resin substrate;
A pattern layer formed on the front side of the resin substrate,
the radiating element is an antenna pattern extending along a plane of the resin substrate ,
The radiating element has an antenna pattern in which a plurality of radiating element bodies are arranged along the vertical and horizontal directions, and at least the radiating element bodies arranged in the vertical direction are electrically connected in series,
As a part of the pattern of the pattern layer, a marking pattern is provided for identifying a cutting position between adjacent radiating element bodies in the horizontal direction.
A decorative sheet characterized by: A resin substrate constituting a dielectric substrate;
a metal layer formed on the rear surface of the resin substrate and constituting a ground conductor plate;
A radiating element embedded in the resin substrate;
A pattern layer formed on the front side of the resin substrate,
the radiating element is an antenna pattern extending along a plane of the resin substrate ,
The radiating element is disposed at least closer to the center than both ends in the width direction of the pattern layer in a plan view.
A decorative sheet characterized by: The decorative sheet according to any one of claims 8 to 10 , characterized in that the radiating element is formed from any one of a metal plate, conductive papermaking fiber, CNF, and SCNF. 12. The decorative sheet according to claim 7 or 11 , wherein the metal plate has a mesh-like antenna pattern. A decorative sheet as described in any one of claims 1 , 2, 4, 5, 7, 8, 9, 11, and 12, characterized in that the radiating element is arranged, when viewed in a plane, at least toward the center rather than toward both widthwise ends of the pattern layer. A decorative sheet according to any one of claims 3, 6, 10 and 13, having an end marking pattern that identifies the boundary between the placement position and non-placement position of the radiating element as part of the pattern of the pattern layer. The pattern layer has a sheet base material and a printing layer formed by printing a pattern on the surface of the sheet base material,
15. The decorative sheet according to claim 1, wherein the design layer is attached via a heat-peelable adhesive layer. The decorative sheet according to any one of claims 1 to 15 , further comprising a moisture-proof layer having a barrier property against moisture, above the position where the radiating elements are disposed. A decorative sheet attachment structure comprising a plurality of decorative sheets according to any one of claims 1 to 16 attached to a wall, the decorative sheets having coupler parts for electrically connecting the antennas of the respective decorative sheets. A decorative sheet attachment structure, in which the decorative sheet according to any one of claims 1 to 16 is attached to a wall, and an antenna of the decorative sheet is electrically connected to a base station installed outside a room having the wall.

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