JP2002256781A - Radio wave absorber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light transmittable radio wave absorber constructed by installing a wire net or a conductive material 4 capable of transmitting light on one side or both sides of a liquid crystal plate 1 capable of transmitting/shutting off light and partially installing a radio wave absorbent 5 on the surface of the conductive material. SOLUTION: Without impression of an electric field to the liquid crystal, light sufficiently passes through the liquid crystal plate 1. An incoming radio wave from the outside is shut off by means of the conductive light transmittable film 4, while a radio wave generated inside is absorbed by means of the radio wave absorbent 5. In this way, light can be taken in from the outside, though unnecessary radio waves are shut off. An unnecessary radio wave generated on the side having the radio wave absorbent mounting face, that is, on the inside can be absorbed. A quantity of lighting can be regulated by increasing/ reducing an area of a stripe pattern shielding the light according to impression of the electric field to the liquid crystal. When color glass is installed on one side face of the liquid crystal plate, a decorative function is added effectively, and it is suitable for a partition material inside an intelligent building.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multifunctional light / light source having a function of transmitting and blocking light, adjusting a function of shielding and absorbing radio waves, and a function of providing air permeability.
The present invention relates to a radio wave shield and a radio wave absorber.

[0002]

2. Description of the Related Art Known radio wave shields have a structure in which once a shield is formed, transmission or blocking of light cannot be adjusted, as seen in a wire mesh or a honeycomb panel. In addition, there are few radio wave absorbers having a daylighting function.
-91785) and the like are known. In addition, in the arrangement of the radio wave absorbing material, a shape having periodicity and symmetry such as a flat plate shape, a pyramid shape, and a lattice shape has been conventionally adopted for use in an anechoic chamber, etc. Had become.

[0003] For this reason, if a conventional radio wave shield or radio wave absorber is used for a partition of a room or the like, it does not have sufficient functions in terms of lighting, ventilation, and decorativeness, which is inconvenient. there were.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to provide a partitioning member for a building indoor equipped with wireless communication equipment and OA equipment, which can adjust the lighting and prevent the invasion of radio waves from the outside. An object of the present invention is to provide an electromagnetic wave shield and a radio wave absorber having a function of absorbing radio waves generated indoors.

Another object of the present invention is to provide a method for improving the characteristics of a radio wave absorber and constructing a new radio wave absorber having multiple functions.

[0006]

Means for Solving the Problems Conventional electromagnetic wave (including light) shields and radio wave absorbers can have variable lighting properties as described above, and do not consider decorativeness or have a functional aspect. Was lacking.

According to the present invention, a liquid crystal having a sufficient light transmittance for light collection and cutoff is used. A liquid crystal plate, that is, a liquid crystal display is kept transparent when light is collected, and an image is formed on the liquid crystal plate when light is blocked. It forms a kind of blind that emits light, blocks light, and has a function that can be electrically adjusted, and is attached to a window or the like. In this case, the light shielding property is improved by means of using a plurality of liquid crystal plates, and the degree of freedom in adjusting the amount of light is increased.

Next, an electromagnetic wave shield is formed by applying such a blind structure. The liquid crystal plate, which is a light-transmitting substrate, originally has an electric field shielding effect, but a transparent conductive material such as a transparent electrode material is further attached to the surface of this liquid crystal plate to provide a radio wave shielding effect. Take measures to increase

Further, as a conventional light transmission type radio wave shielding material, there is a structure in which a wire net or a metal wire is put in a glass material. On the other hand, according to the present invention, a transparent conductive material is mounted on the surface of a light transmitting material substrate such as glass or an acrylic plate to constitute a light transmitting type radio wave shielding material.

[0010] In this case, the radio wave shielding effect can be enhanced by forming a transparent conductive material into a multilayer on these substrate surfaces. Of course, in this case, the transparent substrate and the transparent conductive material are referred to, but the transparency is not perfect and may be turbid. Alternatively, a material having various colors such as stained glass can be used for a transparent substrate or a transparent conductive material. Therefore, the half mirror and the like originally have a radio wave shielding effect as compared with ordinary glass, but the above-described means can provide a more effective shielding effect.

Further, with respect to these configurations, air holes can be opened to maintain air permeability and communication as long as radio waves can be cut off. Next, the radio wave absorber is partially adhered to the surface of the radio wave shield configured as described above, or a gap is provided between the conductive substrate, that is, the short-circuiting plate and the radio wave absorber, as in the case of a radio wave absorber having a permeable structure. Thus, this absorber is constituted. In this case, the radio wave absorber can be arranged on one side or both sides of the conductive substrate. In addition, the configuration of the radio wave absorbing material in this case may be an image, an image, a geometric pattern, or the like using a curved radio wave absorber, in addition to a conventional symmetric structure using a rod-shaped or tile-shaped absorber, as in the related art. Means are designed so that the radio wave absorption characteristics have a predetermined value as a whole.

As described above, after the light transmitting type radio wave absorber is formed, a means for providing a vent hole within a limit capable of maintaining a predetermined radio wave absorbing characteristic is employed to provide a light collecting property, a light blocking property,
A radio wave absorber having functions such as air permeability is configured. Also,
In this case, when a magnetic material such as ferrite is used as a radio wave absorber, a method of improving characteristics using a magnetized ferrite radio wave absorber to which a static magnetic field is applied can be applied.

Next, in order to improve the absorption characteristics of the radio wave absorber, a linear radio wave absorber is three-dimensionally wound to form an element, which is arranged on a conductive substrate to constitute a radio wave absorber. For example, a radio wave absorbing material is formed by winding a linear radio wave absorbing material in a coil shape or a helical shape, and the radio wave absorbing material is arranged with regularity or randomly arranged to form a radio wave absorbing material. The three-dimensionally constructed radio wave absorbing element materials are made of various dimensions, and a means is employed in which radio wave absorbers made of element materials having the same dimensions are combined in a multilayer structure. Alternatively, a means for forming a radio wave absorber by combining radio wave absorbers composed of randomly arranged radio wave absorbers in a multilayer structure is employed.

Further, the radio wave absorber composed of the regularly arranged radio wave absorbing element materials and the randomly arranged radio wave absorbing element materials can be combined and integrated into a multilayer to form a radio wave absorber. Further, a conventional ferrite, a resistive or dielectric radio wave absorber and the radio wave absorber of the present invention can be combined.

Here, the linear electromagnetic wave absorber is formed into a linear shape or a tape shape using a magnetic material, a resistor, or a dielectric material, and if necessary, a conductive material or a known static magnetic field is used as a core material thereof. Is used, and this is wound in a coil shape, a helical shape, or a spiral shape to form a radio wave absorbing element material.

In order to form a radio wave absorber using this radio wave absorbing element material, the radio wave absorbing material may be formed as a set of these elements alone without being mixed with other materials, or may be made of the same material or another material. These radio wave absorbing element materials are mixed into the material to form a single radio wave absorbing material plate. When the electromagnetic wave absorbing element material formed in a coil shape or the like is mixed in the material constituting the electromagnetic wave absorber, it is not necessary to use these electromagnetic wave absorbing element materials, and the coil shape made of a conductive material may be used. Or a helical material may be mixed, or a radio wave absorber composed of a mixture of these radio wave absorbing element materials and a conductive material may be formed.

Further, a means for improving the electromagnetic wave absorption characteristics by interposing the conductive material formed in a coil shape or a helical shape in the electromagnetic wave absorbing material constituting material is used. In addition, the temperature of the outer wall surface of a building exterior wall surface and other buildings greatly fluctuates day and night and seasonally. Therefore, the absorption characteristics of the radio wave absorbing material are deteriorated by the temperature. As a countermeasure, the shape memory alloy and the shape memory resin are deformed at a predetermined temperature, and these are combined with a radio wave absorber to form a radio wave absorber. To prevent deterioration of the radio wave absorption characteristics.

Further, it has conventionally been difficult to provide illumination in an anechoic chamber. In the present invention, focusing on the fact that optical fibers, bundle fibers, and other light guides have a relatively low dielectric constant, a radio wave absorber is formed using these means, and these optical materials are included. , And is designed so that the radio wave absorption characteristics have a predetermined value.

Next, according to the construction principle of the conventional radio wave absorber, a conductor short-circuit plate is provided on the back surface of the radio wave absorber, and this is an essential element in the configuration of the radio wave absorber. However, there is a problem that, due to the presence of the reflecting surface due to the conductor short-circuiting plate, sufficient radio wave absorption characteristics including wide band characteristics cannot be obtained.

On the other hand, in the present invention, the radio wave absorbing material back short-circuiting conductor plate is eliminated from the components of the radio wave absorber to improve the radio wave absorbing characteristics. That is, another material other than the conductor is disposed on the back surface of the radio wave absorbing material, or the conductor short-circuit plate is completely eliminated, and a means composed of only the radio wave absorbing material is used. In this case, when other materials are used, various materials having various electric constants may be used. However, in particular, a means for arranging a material having a high dielectric constant or a high magnetic permeability at the position of the conventional conductor short-circuit plate is adopted.

Further, the material is constituted so that the electric constant changes stepwise or continuously, and the material is arranged at the position of the short-circuit conductor plate of the conventional wave absorber to improve the characteristics of the wave absorber. Improve. In this case, while the conventional conductor short-circuiting plate used was a high-conductivity one such as an iron plate, a copper plate, or a wire mesh, the conductivity was increased by means of mixing a conductive material with a dielectric or magnetic material. Means is to use a material that has been provided and use it instead of the conventional conductor short-circuit plate.

As described above, the present invention provides a
The conventional short-circuit conductor plate on the back side has a high conductivity, that is, a conductor that is treated as a perfect conductor with infinite conductivity in the theoretical design, but this is completely eliminated or replaced By using a low-conductivity dielectric or magnetic material, or a high-permittivity or high-permeability material, or by placing a material whose electrical constant changes gradually at the position of a conventional conductor short-circuit plate, The purpose is to improve the absorption characteristics.

That is, the effect of improving the radio wave absorption characteristics is obtained by giving the degree of freedom to the effect of the short-circuit conductor plate which strongly affects the frequency characteristics.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relating to an electromagnetic wave shield and an electromagnetic wave absorber will be described below based on embodiments shown in the drawings. Figure 1
FIG. 2 is a perspective view of an embodiment of a blind attached to a window or the like using a liquid crystal plate (1) capable of transmitting and blocking light. By controlling the electric field applied to the liquid crystal plate (1), a stripe pattern (2) can be formed to transmit or block light.

FIG. 2 shows a structure in which the liquid crystal plate (1) is assembled in a multilayer shape so that light can be completely blocked. FIG. 3 shows a case in which a liquid crystal plate and a color glass (3) are combined, and a conductive transparent film (4) and a liquid crystal plate (1) are adhered to each other. It has functions. In this case, since the liquid crystal plate itself has anisotropy, it has a single function of shielding and absorbing radio waves. Therefore, a single liquid crystal plate or a plurality of liquid crystal plates as shown in FIG. Can compose the body.

Next, FIG. 4 shows a radio wave absorbing material (5) on the surface of the conductive light transmitting film (4) of the light shield constructed as shown in FIG.
FIG. 3 is a cross-sectional view of an embodiment of a radio wave absorber constituted by partially mounting a so as to allow light to pass therethrough. In this case, as shown in FIG. 5, a conductor plate (6) is attached only to the back portion of the radio wave absorbing material (5), and this is attached to one or both surfaces of the substrate or the glass substrate of the embodiment of FIG. Improves absorption characteristics.

FIG. 6 shows colored glass A having different colors.
Using the (7) and the colored glass B (8) as substrates, a rod-shaped radio wave absorbing material (9) prepared as shown in FIG. 5 was attached to the boundary surface between the two colored glasses so that light could be transmitted and radio waves were absorbed. It is a front view of one Example. In other words, this is a material having a light-collecting property and a radio wave absorption characteristic like a stained glass. If a conductive light-transmitting film (4) is adhered to the glass surface as in the embodiment of FIG. The function of the radio wave shielding property can be added. In this case, the rod-shaped electromagnetic wave absorbing material (9) may have a cylindrical shape, a planar shape, or another shape, and the geometrical arrangement may be a periodic structure like a turtle pattern, or a random structure. Good.

FIG. 7 shows another embodiment based on the construction principle of FIG. 6, in which a conductive light transmitting film (4) is adhered to the surface of a glass substrate (10), and a sheet-like electromagnetic wave absorbing material is further added. (1
2) Closely contact the surface, or place a planar conductor plate (11) on the back of only the radio wave absorber on the surface of the glass substrate (10).
This is a radio wave absorber having the functions of transmitting light, shielding radio waves, and absorbing radio waves, which are formed by closely adhering ones interposed therebetween. This is an embodiment in which a slit (13) is provided in the planar electromagnetic wave absorbing material (12) and a flower pattern is drawn, and has decorativeness in addition to the above-described functions. In the above configuration, if a conductive yarn such as a wire net or carbon fiber is used instead of the conductive light transmitting film (4), air permeability is added in addition to the above functions.
When a magnetic material is used as the radio wave absorbing material, a static magnetic field can be applied to change or improve the radio wave absorbing characteristics.

FIG. 8 shows an embodiment in which an optical fiber, a bundle fiber (14), a light guide and the like are embedded in a radio wave absorber or a radio wave shield to add a lighting function. A hole (1) is formed in the radio wave absorber having (11).
5) and the light source is composed of bundle fibers.
2 shows a basic configuration principle.

Next, FIG. 9 is a side view of an embodiment in which a radio wave absorber is formed by forming a radio wave absorber into a coil shape. This embodiment is a radio wave absorber in which a radio wave absorbing material (17) is formed by winding a linear radio wave absorbing material (16) in a conical shape, and this is arranged on a planar conductor plate (11). If a substrate in which the conductive light transmitting film (4) is adhered to the above-mentioned glass plate is used instead of the planar conductor plate (11), a daylighting function can be added.

FIG. 10 shows an embodiment in which radio wave absorbing element materials (17) having different dimensions and the same characteristics are formed in a multilayer structure. Of course, in this case, the radio wave absorbing element material (17) of each layer may have different radio wave absorption characteristics. FIG.
FIG. 4 is a cross-sectional view of an embodiment of a radio wave absorber constituted by combining the multilayered radio wave absorbing element material (17) and another radio wave absorbing material, for example, a ferrite material (23).

FIG. 11 shows a radio wave absorbing element material (17) in which a linear radio wave absorbing material (16) is formed in a coil shape and a low dielectric constant material (18) such as a styrene foam material or another radio wave absorbing material (1).
9 is an embodiment of a radio wave absorber constructed to be buried regularly in 9). In this case, the radio wave absorbing element material of each layer (17)
By changing the dimensions of the antenna, the electromagnetic wave absorption characteristics are improved.

FIG. 12 shows another radio wave absorbing material (19).
And a method of constructing the radio wave absorbing material including the radio wave absorbing element material (17).
7) also uses those randomly oriented. Also,
A layer made of the radio wave absorbing element material (17) or the coil-shaped conductive material (20) of the present invention is interposed in a known air layer or a low dielectric constant medium (Japanese Utility Model Application No. 57-91785).
The whole constitutes a radio wave absorber.

Here, the method of forming the radio wave absorbing element material (17) is, as shown in the embodiment of FIG. 13, in addition to the radio wave absorbing material (16) formed linearly, the core material (21). A cylindrical or tape-shaped material shown in FIG. 14 using a conductive material can also be used. Further, a known magnet material can be used as the core material (21). Further, as the core material (21), a material obtained by impregnating carbon graphite or ferrite powder or the like dissolved in a solvent in which an adhesive is mixed with a dielectric material such as cotton or a shape memory alloy or a shape memory resin is used. Can be done. For example, using a rubber ferrite radio wave absorber, a radio wave absorber is formed using a shape memory alloy as a core material and a back short-circuit conductor plate, an electric current is applied to the shape memory alloy, and the shape memory alloy is heated at a predetermined temperature by heat generated by Joule heat. The transformation temperature can be set so as to be deformed, and the shape of the radio wave absorber can be changed as necessary to change the radio wave absorption characteristics.

FIG. 15 shows a radio wave absorbing element material (17).
Is an example in which is formed in a planar shape, and in this case, an example in which it is formed in a spiral shape is shown. A large number of these are assembled to form a radio wave absorber. FIG. 16 shows a structure in which a powdery conductive material is mixed with a dielectric material on the back surface of the radio wave absorbing material (5) to form a material (22) having a lower conductivity than a normal conductive plate such as an iron material or a copper material. FIG. 4 is a perspective view of one embodiment of the present invention in which this is attached to the back of the radio wave absorber.

[0036]

As is apparent from the above description, the present invention is intended to provide a multifunctional electromagnetic wave shield or electromagnetic wave absorber, and is applied to a partition member or the like in a building having indoor radio equipment and the like. It is extremely effective.

For example, a blind which can be electrically varied by turning on and off a switch by electrically controlling a transparent liquid crystal display to emit a stripe pattern or other patterns to block or transmit light. Can be configured. further,
By attaching a transparent or light-transmitting conductive material to the liquid crystal plate, a shield that can more effectively block radio waves can be configured. As a result, the amount of collected light can be freely adjusted, and a radio wave can be shielded.

In addition to this shield, a radio wave absorber is partially mounted on a radio wave shield in which a transparent or translucent conductive material is mounted on an object capable of transmitting or partially transmitting light, and light is transmitted. However, a light transmission type radio wave absorber having an action of absorbing radio waves can be configured. In this case, an image, an image, a geometric pattern, or the like is formed using a planar or curved absorber as the radio wave absorber, and a light transmission type radio wave absorber to which a decorative function is added can be configured.

Also, a radio wave absorber composed of a large number of radio wave absorbing element materials formed of a spiral, coil, or spiral linear radio wave absorbing material is also spatially radio wave absorbing material of these shapes. The material is only placed, and the substrate that constitutes the radio wave absorber, that is, the short-circuiting plate is made of a wire mesh or the above-mentioned transparent conductive material. There is an effect that an absorber can be configured.

The light shield and the radio wave absorber of the present invention have a remarkable effect that an electromagnetic wave shield and a radio wave absorber having more functions can be constituted by selecting one or a combination of a plurality of them. is there.

[Brief description of the drawings]

FIG. 1 is a perspective view of a blind using a liquid crystal plate.

FIG. 2 is a side view of a blind in which a plurality of liquid crystal plates are stacked.

FIG. 3 is a sectional view of an electromagnetic wave shield.

FIG. 4 is a cross-sectional view of a radio wave absorber having a light shielding adjustment function in which a radio wave absorber is attached on the surface of the conductive light transmitting film of the electromagnetic wave shield of FIG. 3;

FIG. 5 is a cross-sectional view illustrating a configuration example of a radio wave absorber.

FIG. 6 is a front view of a radio wave absorber provided with a lighting and decoration function using colored glass.

FIG. 7 is a perspective view of a configuration example of a radio wave absorber having a lighting function.

FIG. 8 is a perspective view of a configuration example of a radio wave absorber having a lighting function.

FIG. 9 is a side view of a radio wave absorber using a spiral radio wave absorber.

FIG. 10 is a side view of a radio wave absorber in which the spiral radio wave absorber of FIG. 9 has a multilayer structure.

FIG. 11 is a side view of a radio wave absorber formed by mixing a radio wave absorbing element material with another material.

FIG. 12 is a side view of a radio wave absorber constituted by combining a radio wave absorbing element material and another radio wave absorbing material.

FIG. 13 is a sectional view of a configuration example of a linear electromagnetic wave absorbing material.

FIG. 14 is a cross-sectional view of a cylindrical radio wave absorber.

FIG. 15 is a front view of a radio wave absorbing element material formed in a planar shape.

FIG. 16 is a perspective view of a radio wave absorber constituted by disposing a low-conductivity material on the back surface of the radio wave absorber.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Liquid crystal board 2 ... Striped pattern 3 ... Colored glass 4 ... Conductive light transmission film 5 ... Radio wave absorber 6 ... Conductor plate 7 ... Colored glass A 8 ...・ Colored glass B 9 ・ ・ ・ Rod-shaped electromagnetic wave absorber 10 ・ ・ ・ Glass substrate 11 ・ ・ ・ Planar conductor plate 12 ・ ・ ・ Planar electromagnetic wave absorber 13 ・ ・ ・ Slit 14 ・ ・ ・ Bundled fiber 15 ・ ・ ・Void 23 ・ ・ ・ Ferrite material 16 ・ ・ ・ Linear radio wave absorbing material 17 ・ ・ ・ Radio wave absorbing element material 18 ・ ・ ・ Low dielectric constant material 19 ・ ・ ・ Other radio wave absorbing material 20 ・ ・ ・ Coiled conductive Material 21: Core material 22: Low conductivity material

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[Procedure amendment]

[Submission date] February 6, 2002 (2002.2.6)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] electricity Nami吸 absorbent body

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates, on the electric wave absorber.

[0002]

In the form of A known wave absorber, tabular or pyramidal shape, and a lattice-like are known.

[0003] These conventional radio wave absorbers do not have a sufficient function in terms of daylighting properties and are inconvenient. Ma
Also, conventional radio wave absorbers did not have a lighting function.
Conventionally, it was difficult to provide lighting in a dark room.

[0004]

[Problems to be solved by the invention]

[0005] The purpose of the present invention is to provide an arrangement method of a new wave absorber having an illumination function.

[0006]

[Means for Solving the Problems]

As the light guide, for example, the radio wave
Optical fiber or bundle fiber embedded in the absorber body
Fiber, etc. can be considered.

In addition, a hole is provided in the radio wave absorber main body.
May be.

[0009]

[0010]

[0011] When providing such voids, within the limits capable of blocking radio waves, Rukoto drilled holes is important. This
By providing such a hole, it is possible to maintain breathability and communication .

[0012]

[0013]

[0014]

[0015]

[0016]

[0017]

In the present invention, attention is paid to the fact that optical fibers, bundle fibers, and other optical guides have a relatively low dielectric constant, and a radio wave absorber is formed by using these means. Then, the radio wave absorption characteristic is designed to have a predetermined value.

[0019]

[0020]

[0021]

[0022]

[0023]

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings . FIG. 8 shows an optical fiber, a bundle fiber, and the like.
Note that other light guides have low dielectric constants,
Is embedded in a radio wave absorber.
In the plate-like radio wave absorber main body formed by (5),
An embodiment in which a lighting function is added by burying a light guide
It is. In this embodiment, the light guide is a bundle
Fiber (14) for lighting with this bundle fiber
As a light source. In addition, the radio wave absorber itself
Are provided with holes (15), which allow air to pass through.
I keep talking. The radio wave absorber main body shown in FIG.
Is a conductor plate on the back (a planar conductor plate in a reference example described later).
(11)). [Reference Example] The following is a description of the related art of the present invention.
This is a reference example. FIG. 1 is a perspective view of a reference example of a blind attached to a window or the like using a liquid crystal plate (1) capable of transmitting and blocking light. By controlling the electric field applied to the liquid crystal plate (1), a stripe pattern (2) can be formed to transmit or block light.

FIG. 2 shows a structure in which the liquid crystal plate (1) is assembled in a multilayer shape so that light can be completely blocked. FIG. 3 shows a case in which a liquid crystal plate and a color glass (3) are combined, and a conductive transparent film (4) and a liquid crystal plate (1) are adhered to each other. It has functions. In this case, since the liquid crystal plate itself has anisotropy, it has a single function of shielding and absorbing radio waves. Therefore, a single liquid crystal plate or a plurality of liquid crystal plates as shown in FIG. Can compose the body.

Next, FIG. 4 shows a radio wave absorbing material (5) on the surface of the conductive light transmitting film (4) of the light shield constructed as shown in FIG.
FIG. 4 is a cross-sectional view of a reference example of a radio wave absorber constituted by partially mounting a so as to allow light to pass therethrough. In this case, as shown in FIG. 5, a conductor plate (6) is attached only to the back portion of the radio wave absorbing material (5), and the conductor plate (6) is attached to one or both surfaces of the substrate or glass substrate of the reference example of FIG. Improves absorption characteristics.

FIG. 6 shows colored glass A having different colors.
Using the (7) and the colored glass B (8) as substrates, a rod-shaped radio wave absorbing material (9) prepared as shown in FIG. 5 was attached to the boundary surface between the two colored glasses so that light could be transmitted and radio waves were absorbed. It is a front view of one reference example . In other words, this has a light-collecting property and a radio wave absorption property like a stained glass, and a conductive light-transmitting film (4) is adhered to the glass surface as shown in the reference example of FIG. 4 on the glass surface. Then, the function of the radio wave shielding property can be added. In this case, the rod-shaped electromagnetic wave absorbing material (9) may have a cylindrical shape, a planar shape, or another shape, and the geometrical arrangement may be a periodic structure like a turtle pattern, or a random structure. Good.

FIG. 7 shows another reference based on the configuration principle of FIG.
In the example , a conductive light-transmitting film (4) adhered to the surface of a glass substrate (10) was further added to a sheet-like electromagnetic wave absorbing material (1).
2) Closely contact the surface, or place a planar conductor plate (11) on the back of only the radio wave absorber on the surface of the glass substrate (10).
This is a radio wave absorber having the functions of transmitting light, shielding radio waves, and absorbing radio waves, which are formed by closely adhering ones interposed therebetween. This is a reference example in which a slit (13) is provided in the planar electromagnetic wave absorbing material (12) and a flower pattern is drawn, and has a decorative property in addition to the above-described functions. In the above configuration, if a conductive yarn such as a wire net or carbon fiber is used instead of the conductive light transmitting film (4), air permeability is added in addition to the above functions.
When a magnetic material is used as the radio wave absorbing material, a static magnetic field can be applied to change or improve the radio wave absorbing characteristics.

[0029]

Next, FIG. 9 is a side view of a reference example in which a radio wave absorbing material is formed in a coil shape to constitute a radio wave absorber. this
The reference example is a radio wave absorber in which a radio wave absorbing material (17) is formed by winding a linear radio wave absorbing material (16) in a conical shape, and this is arranged on a planar conductor plate (11). If a substrate in which the conductive light transmitting film (4) is adhered to the above-mentioned glass plate is used instead of the planar conductor plate (11), a daylighting function can be added.

FIG. 10 shows a reference example in which radio wave absorbing element materials (17) having different dimensions and the same characteristics are multilayered. Of course, in this case, the radio wave absorbing element material (17) of each layer may have different radio wave absorption characteristics. FIG.
FIG. 3 is a cross-sectional view of a reference example of a radio wave absorber constituted by combining the multilayered radio wave absorbing element material (17) and another radio wave absorbing material, for example, a ferrite material (23).

FIG. 11 shows a radio wave absorbing element material (17) in which a linear radio wave absorbing material (16) is formed in a coil shape and a low dielectric constant material (18) such as a styrene foam material or another radio wave absorbing material (1).
9) Participation in radio wave absorbers buried regularly inside
This is an example . In this case, the radio wave absorbing element material of each layer (17)
By changing the dimensions of the antenna, the electromagnetic wave absorption characteristics are improved.

FIG. 12 shows another radio wave absorbing material (19).
And a method of constructing the radio wave absorbing material including the radio wave absorbing element material (17).
7) also uses those randomly oriented. Also,
It is known to the air layer or a low dielectric constant medium of (JitsuganAkira 57-91785), electric wave absorbing element member (17) or a layer is interposed consisting coiled conductive material (20), the radio wave absorber as a whole Make up the body.

Here, the method of forming the radio wave absorbing element material (17) is, as shown in the reference example of FIG. 13, in addition to the radio wave absorbing material (16) formed in a linear shape, the core material (21). A cylindrical or tape-shaped material shown in FIG. 14 using a conductive material can also be used. Further, a known magnet material can be used as the core material (21). Further, as the core material (21), a material obtained by impregnating carbon graphite or ferrite powder or the like dissolved in a solvent in which an adhesive is mixed with a dielectric material such as cotton or a shape memory alloy or a shape memory resin is used. Can be done. For example, using a rubber ferrite radio wave absorber, a radio wave absorber is formed using a shape memory alloy as a core material and a back short-circuit conductor plate, an electric current is applied to the shape memory alloy, and the shape memory alloy is heated at a predetermined temperature by heat generated by Joule heat. The transformation temperature can be set so as to be deformed, and the shape of the radio wave absorber can be changed as necessary to change the radio wave absorption characteristics.

FIG. 15 shows a radio wave absorbing element material (17).
Is a reference example of a planar configuration, and in this case, an example of a spiral configuration is shown. A large number of these are assembled to form a radio wave absorber. FIG. 16 shows a structure in which a powdery conductive material is mixed with a dielectric material on the back surface of the radio wave absorbing material (5) to form a material (22) having a lower conductivity than a normal conductive plate such as an iron material or a copper material. And attached it to the back of the radio wave absorber
It is a perspective view of one reference example .

[0036]

As is apparent from the above description , the present invention
According to the above, mounting the light guide on the radio wave absorber body
Lighting function and lighting equipment
Unlike conventional radio wave absorbers that have no function, light guides are used as light sources.
Lighting can be implemented. Therefore, for example
For example, if you want to provide lighting in an anechoic chamber,
It is preferable to use an absorber.

[0037]

[0038]

[0039]

[0040]

[Brief description of the drawings]

FIG. 1 is a perspective view of a blind using a liquid crystal plate.

FIG. 2 is a side view of a blind in which a plurality of liquid crystal plates are stacked.

FIG. 3 is a sectional view of an electromagnetic wave shield.

FIG. 4 is a cross-sectional view of a radio wave absorber having a light shielding adjustment function in which a radio wave absorber is attached on the surface of the conductive light transmitting film of the electromagnetic wave shield of FIG. 3;

FIG. 5 is a cross-sectional view illustrating a configuration example of a radio wave absorber.

FIG. 6 is a front view of a radio wave absorber provided with a lighting and decoration function using colored glass.

FIG. 7 is a perspective view of a configuration example of a radio wave absorber having a lighting function.

FIG. 8 is a perspective view of a configuration example of a radio wave absorber having a lighting function.

FIG. 9 is a side view of a radio wave absorber using a spiral radio wave absorber.

FIG. 10 is a side view of a radio wave absorber in which the spiral radio wave absorber of FIG. 9 has a multilayer structure.

FIG. 11 is a side view of a radio wave absorber formed by mixing a radio wave absorbing element material with another material.

FIG. 12 is a side view of a radio wave absorber constituted by combining a radio wave absorbing element material and another radio wave absorbing material.

FIG. 13 is a sectional view of a configuration example of a linear electromagnetic wave absorbing material.

FIG. 14 is a cross-sectional view of a cylindrical radio wave absorber.

FIG. 15 is a front view of a radio wave absorbing element material formed in a planar shape.

FIG. 16 is a perspective view of a radio wave absorber constituted by disposing a low-conductivity material on the back surface of the radio wave absorber.

[Description of Signs] 1 ... Liquid crystal plate 2 ... Striped pattern 3 ... Colored glass 4 ... Conductive light transmitting film 5 ... Electromagnetic wave absorbing material 6 ... Conductor plate 7 ... Color Glass A 8 ... Colored glass B 9 ... Rod-shaped radio wave absorber 10 ... Glass substrate 11 ... Planar conductor plate 12 ... Planar radio wave absorber 13 ... Slit 14 ... Bundle Fiber 15 ・ ・ ・ Vacancy 23 ・ ・ ・ Ferrite material 16 ・ ・ ・ Linear radio wave absorbing material 17 ・ ・ ・ Radio wave absorbing element material 18 ・ ・ ・ Low dielectric constant material 19 ・ ・ ・ Other radio wave absorbing material 20 ・ ・・ Coiled conductive material 21 ・ ・ ・ Core material 22 ・ ・ ・ Low conductivity material

Claims (16)

[Claims] 1. A blind using liquid crystal, which can transmit and block light by electric field control. 2. A light and radio wave shield comprising a liquid crystal plate capable of transmitting and blocking light by electric field control, and configured to be able to shield radio waves. 3. A light-transmitting radio wave shield made of a transparent conductive material that transmits light. 4. A light and radio wave shield according to claim 1, wherein a radio wave absorber is partially attached to one side thereof.
Radio wave absorber with daylighting function. 5. The radio wave absorber according to claim 4, wherein radio wave absorbers are attached to both sides of the radio wave shield base surface. 6. A method for constructing a radio wave absorber according to claim 4, wherein when a rod-shaped or planar radio wave absorber is used, the radio wave absorber is attached to a geometrically arbitrary shape. Radio wave absorber. 7. A radio wave absorber made of a liquid crystal material. 8. The method for constructing a radio wave shield and a radio wave absorber according to claim 1, wherein the light / wave radio wave shield, the light transmission / wave radio wave shield and the radio wave absorber are provided with a ventilation hole to form a breathable structure. 9. A radio wave absorber formed by applying a static magnetic field when a magnetic material is used as the radio wave absorber according to claim 4. 10. A radio wave absorber formed by winding a linear radio wave absorber three-dimensionally. 11. A radio wave absorber formed by winding the radio wave absorber according to claim 10 in a plane. 12. A radio wave absorber constituted by using a conductor as a core material of the linear radio wave absorber according to claim 10. 13. A radio wave absorber having a configuration in which a shape memory alloy is used as the conductor core material according to claim 12 so that the shape can be changed in response to a temperature change. 14. An electromagnetic wave absorber constituted in combination with a shape memory alloy and a shape memory resin. 15. A radio wave absorber having an illumination function by attaching an optical fiber to the radio wave absorber according to claim 4. 16. A radio wave absorber in which the conductor short-circuit plate on the side opposite to the radio wave incident slope, that is, on the back side of the radio wave absorber is eliminated in the configuration of the radio wave absorber.