JP2002118391A - Electromagnetic wave shield - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electromagnetic wave shield for performing sufficient electromagnetic wave shielding characteristics without decreasing a light transmission properties by broadening a frequency band of an object to be shielded of the electromagnetic wave. SOLUTION: In the case of an electromagnetic wave shielding window, an electromagnetic wave absorption layer 9 for absorbing the electromagnetic wave due to a multiple-reflection is arranged at each of edges of electromagnetic wave shielding layers 4 and 5 corresponding to a window frame 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to, for example, an electromagnetic shield window installed on a window of a building to reduce information leakage due to electromagnetic wave radiation from inside the building, an electromagnetic shield filter mounted on a personal computer monitor screen, and the like. The present invention relates to an electromagnetic wave shield.

[0002]

2. Description of the Related Art FIG. 14A is a side sectional view showing the structure of a conventional electromagnetic wave shielding window, FIG. 14B is a front view showing the structure of a conventional electromagnetic wave shielding window, and FIG. FIG. 14 is a side cross-sectional view showing a state of multiple reflection on an electromagnetic wave shielding layer in the conventional electromagnetic wave shielding window shown in FIG. In the figure, reference numeral 1 denotes an electromagnetic wave shielding window, 2 denotes a window frame formed of a conductor, and 3 denotes a light-transmitting medium plate having a thickness d attached inside the window frame 2. A first electromagnetic wave shielding layer 4 and a second electromagnetic wave shielding layer 5 made of a wire mesh or the like are provided on both surfaces of the light transmitting medium plate 3. The window frame 2 of the electromagnetic wave shielding window 1 is grounded to the ground 6.

[0003]

In such an electromagnetic wave shielding window 1, almost the incident electromagnetic wave 7 is reflected by the first electromagnetic wave shielding layer 4. However, some of the incident electromagnetic waves 7
The transmitted electromagnetic wave 8 transmitted through the first electromagnetic wave shielding layer 4 is also slightly present. This transmitted electromagnetic wave 8 is reflected inside the second electromagnetic wave shielding layer 5, returned inside the first electromagnetic wave shielding layer 4, reflected and transmitted, and the reflection or transmission is repeated between the two electromagnetic wave shielding layers (multiplexing). Reflection). The electromagnetic waves that are multiple-reflected between the two electromagnetic wave shielding layers eventually pass through the electromagnetic wave shielding window 1. The total amount of the transmitted electromagnetic wave 8 is, as shown in FIG.

(Equation 1) Given by In FIG. 15, the electromagnetic wave shielding window 1 is shown.
It represents an electromagnetic wave incident on the first electromagnetic shielding layer 4 at I _1, represents the reflected fraction with I _R1. Further, the transmission amount transmitted through the first electromagnetic wave shielding layer 4 and then transmitted through the second electromagnetic wave shielding layer 5 is represented by I _T1 , and is multiply reflected between the two electromagnetic wave shielding layers and transmitted through the second electromagnetic wave shielding layer 5. The transmitted components are sequentially _denoted by I _T3 , I _T5 . . . It is represented by I _T2n−1 , and the transmitted light reflected by the second electromagnetic wave shielding layer 5 and transmitted through the first electromagnetic wave shielding layer 4 is sequentially denoted by I _T2 , I _T4,. . . It is represented by _IT2n . As described above, even when a plurality of electromagnetic wave shielding layers are provided as a window shield, multiple reflection terms are generated, transmission of electromagnetic waves cannot be suppressed, and electromagnetic wave shielding characteristics cannot be improved.

Therefore, in the conventional electromagnetic wave shield disclosed in, for example, JP-A-6-350286, a means such as providing a spacer between a shield plate and a window glass is used to improve the electromagnetic wave shielding characteristics. I have.

However, in such a conventional electromagnetic wave shield, the frequency band in which the electromagnetic wave shielding characteristics can be expected to be improved is narrow. Therefore, the electromagnetic wave shielding characteristics in other frequency bands are not sufficient, and the above-described special technique of sandwiching the spacer is not sufficient. There is a disadvantage that the advantage of performance improvement by adopting the structure is small.

Further, in the conventional electromagnetic wave shield, it is necessary to lower the sheet resistance of an electromagnetic wave shielding layer made of a wire mesh or the like in order to obtain sufficient electromagnetic wave shielding characteristics. And it was difficult to satisfy both the electromagnetic wave shielding property and the light transmittance at the same time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. An electromagnetic wave capable of providing a wide frequency band to be shielded from electromagnetic waves and exhibiting sufficient electromagnetic wave shielding characteristics without deteriorating light transmittance. An object is to provide a shield body.

[0008]

An electromagnetic wave shield according to the present invention comprises a plurality of electromagnetic wave shielding layers, an electromagnetic wave arranged at an edge of the electromagnetic wave shielding layer and absorbing electromagnetic waves penetrating between the electromagnetic wave shielding layers. And an absorbing layer.

An electromagnetic wave shield according to the present invention is characterized in that at least a part of the plurality of electromagnetic wave shielding layers is installed non-parallel to each other.

[0010] The electromagnetic wave shield according to the present invention is characterized in that at least a part of the plurality of electromagnetic wave shielding layers has a curved surface.

[0011] The electromagnetic wave shield according to the present invention is characterized in that at least a part of the plurality of electromagnetic wave shielding layers is sealed in a translucent medium plate.

An electromagnetic wave shield according to the present invention is characterized in that at least a part of the plurality of electromagnetic wave shielding layers is provided between the plurality of light transmitting medium plates.

[0013] In the electromagnetic wave shielding body according to the present invention, one electromagnetic wave shielding layer is provided in parallel with the translucent medium plate,
Another electromagnetic wave shielding layer is provided at an angle θ with respect to the translucent medium plate.

In the electromagnetic wave shield according to the present invention, two electromagnetic wave shielding layers are provided in parallel with the light transmitting medium plate.
Another electromagnetic wave shielding layer is provided between the electromagnetic wave shielding layers parallel to each other at an angle θ with respect to the translucent medium plate.

In the electromagnetic wave shield according to the present invention, two electromagnetic wave shielding layers are provided in parallel to the light transmitting medium plate,
A plurality of other electromagnetic wave shielding layers are provided between the electromagnetic wave shielding layers parallel to each other so as to have an angle of ± θ with respect to the translucent medium plate.

In the electromagnetic wave shield according to the present invention, one electromagnetic wave shielding layer is provided in parallel with the light transmitting medium plate,
Bending another electromagnetic wave shielding layer at an angle of π-2θ,
The bent portion is adjacent to the electromagnetic wave shielding layer.

[0017] In the electromagnetic wave shield according to the present invention, one electromagnetic wave shielding layer is provided in parallel with the translucent medium plate,
The other n electromagnetic wave shielding layers are sequentially formed by π−θ ₁ , π−θ ₂ ,.
.., π-θ _n (however, θ ₁ <θ ₂ <... <θ _n )
And the bent portions of the n electromagnetic wave shielding layers are sequentially adjacent to each other at the same position of one electromagnetic wave shielding layer.

In the electromagnetic wave shielding body according to the present invention, one electromagnetic wave shielding layer is provided in parallel with the light transmitting medium plate,
The other 2n electromagnetic wave shielding layers are paired in pairs, and π-
θ ₁ , π−θ ₂ ,..., π−θ _n (where θ ₁ <θ
₂ <... <Θ _n ), and are sequentially installed at the same position on one electromagnetic wave shielding layer so as to form an angle of ₂ <... <Θ _n ).

In the electromagnetic wave shielding body according to the present invention, one electromagnetic wave shielding layer is provided in parallel with the translucent medium plate,
Another electromagnetic wave shielding layer is bent so that two concave curved surfaces are formed, and the bent portion is adjacent to the electromagnetic wave shielding layer.

In the electromagnetic wave shielding body according to the present invention, one electromagnetic wave shielding layer is provided in parallel with the translucent medium plate,
The other plurality of electromagnetic wave shielding layers are bent so that two concave surfaces are formed, and each bent portion has an average curvature σ ₁ , σ ₂ ,..., Σ _n (where σ ₁ < σ ₂
<... <Σ _n ), characterized in that the electromagnetic wave shielding layers are sequentially adjacent at the same position.

[0021] In the electromagnetic wave shield according to the present invention, one electromagnetic wave shielding layer is provided in parallel with the translucent medium plate.
The average curvature of the other electromagnetic wave shielding layers is σ ₁ , σ ₂ ,.
., Σ _n (however, σ ₁ <σ ₂ <... <Σ _n ), and each of the electromagnetic wave shielding layers is adjacent to the same position of one electromagnetic wave shielding layer in a pair. It is characterized by having made it.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. In the description of this embodiment, a case where the electromagnetic wave shielding body of the present invention is applied to an electromagnetic wave shielding window will be exemplified.

Embodiment 1 FIG. 1 is a side sectional view showing an internal configuration of the electromagnetic wave shielding window according to Embodiment 1 of the present invention. Among the components of the first embodiment, the same components as those of the conventional electromagnetic wave shielding window are denoted by the same reference numerals, and the description of those portions will be omitted.

In the first embodiment, the first electromagnetic wave shielding layer 4 is embedded in one surface of the translucent medium plate 3,
On the other surface, a second electromagnetic wave shielding layer 5 parallel to the first electromagnetic wave shielding layer 4 is embedded. An electromagnetic wave absorbing layer 9 is disposed inside the window frame 2 of the electromagnetic wave shielding window 1 between the electromagnetic wave shielding layers 4 and 5 and the edge portions thereof. In this example, the electromagnetic wave absorbing layers 9 are formed along the peripheral portions of the electromagnetic wave shielding layers 4 and 5.
Are formed. The electromagnetic wave absorbing layer 9 reliably and efficiently absorbs a part of the electromagnetic wave due to multiple reflections on the light transmitting medium plate 3 between the electromagnetic wave shielding layers 4 and 5.

As a method for forming the electromagnetic wave absorbing layer 9, a method using a magnetic substance such as ferrite or a material containing carbon powder is suitably used. By adopting a structure such as a trapezoid or a pyramid, the electromagnetic wave absorption performance can be further enhanced.

As described above, according to the first embodiment, since the electromagnetic wave absorbing layers are provided at the edges of the electromagnetic wave shielding layers 4 and 5, the light transmission between the electromagnetic wave shielding layers 4 and 5 is achieved. Part of the electromagnetic wave due to multiple reflections on the conductive medium plate 3 can be reliably and efficiently absorbed, so that leakage of the electromagnetic wave to the outside of the electromagnetic wave shielding window 1 can be prevented, and the electromagnetic wave shielding characteristics can be improved.

Embodiment 2 FIG. FIG. 2 is a side sectional view showing an internal configuration of the electromagnetic wave shielding window according to Embodiment 2 of the present invention. Components of the second embodiment that are common to those of the first embodiment are denoted by the same reference numerals, and descriptions of those portions are omitted.

The feature of the second embodiment is that the first embodiment
The two electromagnetic wave shielding layers 4 and 5 are embedded on both surfaces of the light transmitting medium plate 3, whereas the first electromagnetic wave shielding layer 4 is disposed on the inner surface of one thin light transmitting medium plate 3. And
The second electromagnetic wave shielding layer 5 is provided on the inner surface of the other thin translucent medium plate 3, and an air layer 10 is interposed between the two. That is, in the first embodiment, the space between the two electromagnetic wave shielding layers 4 and 5 is the light transmitting medium plate 3 itself, whereas in the second embodiment, the space between the two electromagnetic wave shielding layers 4 and 5 is the air layer 10. Different. Also in the second embodiment,
The electromagnetic wave absorbing layer 9 reliably and efficiently absorbs a part of the electromagnetic wave due to multiple reflections in the air layer 10 between the two electromagnetic wave shielding layers 4 and 5.

As described above, according to the second embodiment, since the electromagnetic wave absorbing layers are provided at the edges of the electromagnetic wave shielding layers 4 and 5, the air layer between the electromagnetic wave shielding layers 4 and 5 is provided. 10 can reliably and efficiently absorb a part of the electromagnetic wave due to the multiple reflection at the electromagnetic wave shielding window 1.
Of the electromagnetic wave to the outside of the device can be prevented, and the electromagnetic wave shielding characteristics can be improved.

Embodiment 3 FIG. 3A is a side sectional view showing an internal configuration of an electromagnetic wave shielding window according to Embodiment 3 of the present invention, and FIG. 3B is a front view showing the electromagnetic wave shielding window shown in FIG. FIG. 4 is a side sectional view showing a state of multiple reflection on the electromagnetic wave shielding layer in the electromagnetic wave shielding window shown in FIG. Among the components of the third embodiment, the same components as those of the second embodiment are denoted by the same reference numerals, and the description of those components is omitted.

The feature of the third embodiment is that, as shown in FIG. 3A, a first electromagnetic wave shielding layer 4 is provided on the inner surface of one thin light transmitting medium plate 3 and the other thin light transmitting medium plate 3 is thin. The light-transmitting medium plate 3 is disposed in parallel with one of the light-transmitting medium plates 3, and the second electromagnetic wave shielding layer 5 is provided between the two light-transmitting medium plates 3 at an angle θ with respect to the first electromagnetic wave shielding layer 4. In that it is arranged in an inclined state. Also in the third embodiment, the electromagnetic wave absorbing layer 9 is provided between the edge of both the electromagnetic wave shielding layers 4 and 5 and the inside of the window frame 2.

Next, the operation will be described. As shown in FIGS. 3A and 4, the incident electromagnetic waves 7 incident at various angles from one of the two electromagnetic wave shielding layers 4 and 5 are attached to each other at an angle θ. Multiple reflection occurs in the air layer 10 between the electromagnetic wave shielding layers 4 and 5. On this occasion,
The multiple reflection between the two electromagnetic wave shielding layers 4 and 5 transitions in a direction in which the distance between the two layers increases (hereinafter, referred to as a spreading direction). That is, of the incident electromagnetic waves 7, the transmitted electromagnetic wave 8 transmitted through the first electromagnetic wave shielding layer 4 and the two electromagnetic wave shielding layers 4 at an angle (π / 2−θ) with respect to the second electromagnetic wave shielding layer 5. The light is reflected in the direction of spread between the five. In this case, the reflected wave is reflected at an angle α ₁ on the inner surface of the first electromagnetic wave shielding layer 4, and this reflected wave forms an angle α ₂ on the inner surface of the second electromagnetic wave shielding layer 5. The reflected wave is reflected by the inner surface of the first electromagnetic wave shielding layer 4 at an angle α ₃ , and the reflection is sequentially repeated. Here, the reflection angle is α ₁ = π
/ 2-2θ, α ₂ = π / 2-3θ, α ₃ = π / 2-5
θ,..., α _2k ≦ θ, and the inclination angle θ of both the electromagnetic wave shielding layers 4 and 5 is less than or equal to the electromagnetic wave associated with the multiple reflections that have been reflected multiple times. Absorption is reliably and efficiently absorbed by the absorption layer 9.

As described above, according to the third embodiment, one electromagnetic wave shielding layer 5 is inclined with respect to the other electromagnetic wave shielding layer 4 so as to be non-parallel to each other. Since the electromagnetic waves related to the multiple reflection can be guided in the spreading direction between the five, the electromagnetic waves related to the multiple reflection can be efficiently absorbed by the electromagnetic wave absorbing layer disposed on the edge of the electromagnetic wave shielding layer.

In the third embodiment, the entirety of one electromagnetic wave shielding layer 5 is inclined with respect to the other electromagnetic wave shielding layer 4 so as to be non-parallel. A configuration in which a part is not parallel may be adopted.

In the third embodiment, the electromagnetic wave shielding layer 5 is fixed to be inclined with respect to the electromagnetic wave shielding layer 4. However, for example, a configuration in which the electromagnetic wave shielding layer 5 is mechanically movable may be adopted. Good. By adopting this configuration, for example, when the intensity of the electromagnetic wave is small, the two electromagnetic wave shielding layers 4 and 5 are arranged in parallel as shown in FIG. 2 as a low-level electromagnetic wave shielding mode, and the intensity of the electromagnetic wave is large. In this case, the electromagnetic wave shielding layer 5 is set as a high-level electromagnetic wave shielding mode.
Only one of them can be inclined so as to have an angle θ as shown in FIGS. In this case, for example, means for suspending the upper part of the electromagnetic wave shielding layer 5 (not shown)
In addition, by providing a means (not shown) for sliding the lower part and the lower part, the above-mentioned mode conversion can be realized.

Embodiment 4 FIG. FIG. 5 is a side sectional view showing the internal configuration of the electromagnetic wave shield window according to Embodiment 4 of the present invention. Among the components of the fourth embodiment, the same components as those of the second embodiment are denoted by the same reference numerals, and the description of those portions is omitted.

The feature of the fourth embodiment is that, as shown in FIG. 5, the first electromagnetic wave shielding layer 4 or the second electromagnetic wave shielding layer 5 is located between the two electromagnetic wave shielding layers 4 and 5 parallel to each other. The point is that the third electromagnetic wave shielding layer 11 having the angle θ is provided. That is, the fourth embodiment is a combination of the second embodiment and the third embodiment, and can guide an electromagnetic wave related to multiple reflection in the direction of arrow A in the figure. An effect similar to that of the illustrated electromagnetic wave shielding window is achieved.

In the fourth embodiment, the entire electromagnetic wave shielding layer 11 is inclined with respect to the first electromagnetic wave shielding layer 4 so as to be non-parallel, but at least a part of the electromagnetic wave shielding layer 11 is non-parallel. A configuration may be adopted.

Embodiment 5 FIG. 6 is a side sectional view showing the internal configuration of the electromagnetic wave shield window according to Embodiment 5 of the present invention. Among the components of the fifth embodiment, the same components as those of the second embodiment are denoted by the same reference numerals, and the description of those portions is omitted.

The feature of the fifth embodiment is that, as shown in FIG. 6, a third electromagnetic wave shielding layer inclined with respect to the first electromagnetic wave shielding layer 4 is provided between the two electromagnetic wave shielding layers 4 and 5 parallel to each other. 11 and a fourth inclined with respect to the second electromagnetic wave shielding layer 5.
Is arranged in an inverted V-shape.
The fifth embodiment can also guide the electromagnetic wave related to multiple reflection along the direction of arrow A in the figure, and thus has the same effect as the electromagnetic wave shield window shown in the third embodiment.

In the fifth embodiment, the entire electromagnetic wave shielding layers 11 and 12 are inclined with respect to the first electromagnetic wave shielding layer 4 so as to be non-parallel. A configuration in which at least a part is non-parallel may be adopted.

Embodiment 6 FIG. FIG. 7 is a side sectional view showing the internal configuration of the electromagnetic wave shield window according to Embodiment 6 of the present invention. Among the components of the sixth embodiment, the same components as those of the second embodiment are denoted by the same reference numerals, and the description of those components is omitted.

The feature of the sixth embodiment is that the fifth embodiment is different from the fifth embodiment.
, The two electromagnetic wave shielding layers 11 and 12 are inclined, while all the electromagnetic wave shielding layers 11 and 12 are (n−
2) There is a point set in the layer. That is, in the sixth embodiment, of the n electromagnetic wave shielding layers, two electromagnetic wave shielding layers are attached in parallel with the translucent medium plate 3, and an angle θ is formed between the two electromagnetic wave shielding layers and the two electromagnetic wave shielding layers. The (n−2) -layer electromagnetic wave shielding layers 11 and 12 are provided as described above, and also in the sixth embodiment, since the electromagnetic waves according to the multiple reflection can be guided in the direction of arrow A in the figure, the An effect similar to that of the electromagnetic wave shield window shown in the third embodiment is achieved.

In the sixth embodiment, the entirety of the n-layered electromagnetic wave shielding layers are inclined and non-parallel to the first electromagnetic wave-shielding layer 4, but the n-layered electromagnetic wave shielding layers 11 and 1 are not parallel to each other.
A configuration may be adopted in which at least a part of the two is non-parallel.

Embodiment 7 FIG. 8 is a side sectional view showing the internal configuration of the electromagnetic wave shielding window according to Embodiment 7 of the present invention. Among the components of the seventh embodiment, the same components as those of the second embodiment are denoted by the same reference numerals, and the description of those components is omitted.

The feature of the seventh embodiment is that an electromagnetic wave shielding layer 4 is provided on the inner surface of one thin light-transmitting medium plate 3 and the other thin light-transmitting medium plate 3 is connected to one light-transmitting medium plate. 3, the electromagnetic wave shielding layer 13 is bent between the two translucent medium plates 3 at an angle of (π−2θ) at the center thereof, and the bent portion 13 a is adjacent to the center of the electromagnetic wave shielding layer 4. It is in the point which made it. That is, in the upper region above the bent portion 13a of the electromagnetic wave shielding layer 13, the electromagnetic wave related to multiple reflection rises along the direction of arrow A and is absorbed by the upper electromagnetic wave absorbing layer 9, and in the lower region, the electromagnetic wave related to multiple reflection. Descends along the direction of arrow A and is absorbed by the lower electromagnetic wave absorbing layer 9. Therefore, the seventh embodiment also has the same effect as the electromagnetic wave shielding window shown in the third embodiment.

In the seventh embodiment, one electromagnetic wave shielding layer is bent. However, one set of two electromagnetic wave shielding layers is used, and one electromagnetic wave shielding layer is provided in an area above the center of the electromagnetic wave shielding layer 4 and in a lower area. Another piece may be provided in the area, and the angle between them may be set to π−2θ.

Embodiment 8 FIG. FIG. 9 is a side sectional view showing an internal configuration of an electromagnetic wave shielding window according to Embodiment 8 of the present invention. Among the components of the eighth embodiment, the same components as those of the second embodiment are denoted by the same reference numerals, and the description of those components is omitted.

The feature of the eighth embodiment is that, unlike the seventh embodiment in which one electromagnetic wave shielding layer is bent, two folded electromagnetic wave shielding layers are used. That is,
In the eighth embodiment, a pair of thin translucent medium plates 3 are disposed in parallel with each other, and an electromagnetic wave shielding layer 4 is disposed in parallel on the inner surface of one of the thin translucent medium plates 3. The two electromagnetic wave shielding layers 13 and 14 are bent at the center between the conductive medium plates 3, and the bent portions 13 a and 14 a are sequentially adjacent to the center of the electromagnetic wave shielding layer 4. The bending angle of the electromagnetic wave shielding layer 13 is (π−θ ₁ ), and the bending angle of the electromagnetic wave shielding layer 14 is (π−2θ ₂ ).

Next, the operation will be described. In the upper region above the bent portions 13a and 14a of the electromagnetic wave shielding layers 13 and 14, the electromagnetic waves related to the multiple reflection rise along the direction of arrow A and are absorbed by the upper electromagnetic wave absorbing layer 9, and the electromagnetic wave shielding layers 13 and 14 In the region below the bent portions 13a and 14a, the electromagnetic waves related to multiple reflection descend along the direction of arrow A and are absorbed by the electromagnetic wave absorbing layer 9 below. Therefore, the eighth embodiment also has the same effect as the electromagnetic wave shielding window shown in the third embodiment.

In the eighth embodiment, the two electromagnetic wave shielding layers are bent, but each of the folded electromagnetic wave shielding layers is formed of a pair of small electromagnetic wave shielding layers. One in the area above the part,
By arranging another one in the lower region, the inclination angles of both may be set to (π-θ ₁ ) and (π-2θ ₂ ).

Embodiment 9 FIG. FIG. 10 is a side sectional view showing the internal configuration of the electromagnetic wave shield window according to Embodiment 9 of the present invention. Among the components of the ninth embodiment, the same components as those of the second embodiment are denoted by the same reference numerals, and the description of those portions will be omitted.

The feature of the ninth embodiment is that, unlike the seventh embodiment using one folded electromagnetic wave shielding layer, n folded electromagnetic wave shielding layers are used. That is, in the ninth embodiment, a pair of thin translucent medium plates 3 are arranged in parallel with each other, and an electromagnetic wave shielding layer 4 is arranged in parallel on the inner surface of one thin translucent medium plate 3. Translucent medium plate 3
N electromagnetic wave shielding layers 15 ₁ , 15 ₂ ,.
_n is bent at the center thereof, and the bent portion 1
5 _a1, 15 _a2, ···, and are sequentially adjacent 15 _an, in the central part of the electromagnetic wave shielding layer 4. Electromagnetic wave shielding layer 15 ₁ , 1
5 _2, ..., bending angle of 15 _n is (π-θ _1),
(Π-θ ₂ ), ..., (π-θ _n-1 ) (where θ ₁
> Θ ₂ >...> Θ _n-1 ).

Next, the operation will be described. Electromagnetic wave shielding layer
Fifteen₁, 15_Two,. . . , 15_nBent part 15_a1,
Fifteen_a2,. . . , 15_anIn the upper region from the boundary
The electromagnetic waves related to the radiation rise in the direction of arrow A and
The electromagnetic wave shielding layer 15 is absorbed by the magnetic wave absorbing layer 9.₁, 1
5 _Two, ..., 15_nBent part 15_a1, 15_a2,
.., 15_anIn the lower region from the
The magnetic wave descends along the direction of arrow A, and the electromagnetic wave absorbing layer below
9 to be absorbed. Therefore, the ninth embodiment also has an actual
The same effect as the electromagnetic shield window shown in the third embodiment can be obtained.
I do.

In the ninth embodiment, each of the n electromagnetic wave shielding layers is bent, but each of the folded electromagnetic wave shielding layers is formed of a pair of small electromagnetic wave shielding layers. One in the area above the part,
By arranging another one in the lower region, the inclination angles of both are set to (π−θ ₁ ), (π−θ ₂ ),.
_n-1 ) (however, θ ₁ > θ ₂ >...> θ _n-1 ).

Embodiment 10 FIG. FIG. 11 is a side sectional view showing the internal configuration of the electromagnetic wave shielding window according to Embodiment 10 of the present invention. Among the components of the tenth embodiment, the same components as those of the second embodiment are denoted by the same reference numerals, and the description of those portions is omitted.

The feature of the tenth embodiment is that, unlike the seventh embodiment, in which both the upper surface and the lower surface are flat with respect to the bent portion 13a of the electromagnetic wave shielding layer 13, the upper surface and the lower surface are the same. The point is that the concave surface faces the electromagnetic wave shielding layer 4.

Next, the operation will be described. In the upper region, the electromagnetic wave related to multiple reflection rises along the direction of arrow A and is absorbed by the upper electromagnetic wave absorbing layer 9 in the upper region with the bent portion 13a of the electromagnetic wave shielding layer 13 as the boundary. It descends along the direction A and is absorbed by the lower electromagnetic wave absorbing layer 9. Therefore, the first embodiment
0 has the same effect as the electromagnetic wave shielding window shown in the third embodiment.

In the tenth embodiment, one electromagnetic wave shielding layer is bent.
One set of electromagnetic wave shielding layers may be used, and one electromagnetic wave shielding layer may be disposed above the central portion of the electromagnetic wave shielding layer 4 and another may be disposed below the central region.

Embodiment 11 FIG. FIG. 12 is a side sectional view showing the internal configuration of the electromagnetic wave shielding window according to Embodiment 11 of the present invention. Among the components of the eleventh embodiment, the same components as those of the second embodiment are denoted by the same reference numerals, and the description of those portions is omitted.

The feature of the eleventh embodiment is that, unlike the tenth embodiment in which one electromagnetic wave shielding layer is bent into a curved shape, two electromagnetic wave shielding layers bent into a curved shape are used. That is, in the eleventh embodiment, a pair of thin translucent medium plates 3 are arranged in parallel with each other, and the electromagnetic wave shielding layer 4 is arranged in parallel on the inner surface of one thin translucent medium plate 3. The electromagnetic wave shielding layers 13 and 14 are bent at the center thereof to form bent portions 13a and 14a, and upper and lower surfaces of the electromagnetic wave shielding layers 13 and 14 are formed with respect to the first electromagnetic wave shielding layer 4 with respect to the bent portions 13a and 14a. After being formed into a curved surface with the concave surface facing, it is disposed between the two translucent medium plates 3, and the bent portions 13 a and 14 a are sequentially adjacent to the center of the electromagnetic wave shielding layer 4. The electromagnetic wave shielding layer 14 according to the eleventh embodiment is disposed between the first electromagnetic wave shielding layer 4 and the electromagnetic wave shielding layer 13, and has an average curvature σ ₁ of the electromagnetic wave shielding layer 14, Σ ₂
Then, the relational expression of σ ₁ > σ ₂ holds.

Next, the operation will be described. In the upper region, the electromagnetic wave related to multiple reflection rises along the direction of arrow A and is absorbed by the upper electromagnetic wave absorbing layer 9 in the upper region with the bent portions 13a and 14a of the electromagnetic wave shielding layers 13 and 14 in the upper region. Such an electromagnetic wave descends along the direction of arrow A and is absorbed by the electromagnetic wave absorbing layer 9 below. Therefore, the eleventh embodiment also has the same effect as the electromagnetic wave shielding window shown in the third embodiment.

In the eleventh embodiment, each of the two electromagnetic wave shielding layers is bent. However, each of the electromagnetic wave shielding layers to be bent has a predetermined curved shape.
The electromagnetic wave shielding layer 4 may be composed of a small set of electromagnetic wave shielding layers, and one electromagnetic wave shielding layer may be disposed above the central portion of the electromagnetic wave shielding layer 4 and another may be disposed below the central portion.

Embodiment 12 FIG. FIG. 13 is a side sectional view showing the internal configuration of the electromagnetic wave shielding window according to Embodiment 12 of the present invention. Among the components of the twelfth embodiment, the same reference numerals are given to components common to the components of the second embodiment, and the description of those portions will be omitted.

The feature of the twelfth embodiment is that one fold
Unlike Embodiment 10 using the bent electromagnetic wave shielding layer,
The point is that n folded electromagnetic wave shielding layers are used. sand
That is, in the twelfth embodiment, the pair of thin translucent medium plates 3
Are disposed in parallel with each other, and one of the thin translucent medium plates 3
The electromagnetic wave shielding layer 4 is disposed in parallel on the inner surface of the
Shielding layer 15₁, 15_Two, ..., 15_nAt its center
Bend to bend 15_a1, 15_a2, ..., 15_an
And the upper and lower sides of the bend
A curved surface with a concave surface facing the first electromagnetic wave shielding layer 4
And placed between the two translucent medium plates 3 and bent
Part 15_a1, 15_a2, ..., 15_anOf the electromagnetic wave shielding layer 4
It is sequentially adjacent to the center. Electromagnetic wave shielding as the second layer
Shielding layer 15 ₁The average curvature of₁And the third layer electromagnetic
Wave shielding layer 15_TwoThe average curvature of_TwoAnd, likewise
Electromagnetic wave shielding layer 15 to be the n-th layer_nThe average curvature of_nWhen
Then, σ₁> Σ_Two> ...> σ_nHolds
You.

Next, the operation will be described. .., 15 _n of the electromagnetic wave shielding layers 15 ₁ , 15 _{2 ,.}
In the upper region from 15 _a2 ,..., 15 _an , the electromagnetic wave related to multiple reflection rises along the direction of arrow A and is absorbed by the upper electromagnetic wave absorbing layer 9. It descends along the direction of arrow A and is absorbed by the lower electromagnetic wave absorbing layer 9. Therefore, the first embodiment
2 also has the same effect as the electromagnetic wave shielding window shown in the third embodiment.

In the twelfth embodiment, the n electromagnetic wave shielding layers are bent.
One set of electromagnetic wave shielding layers may be used, and one electromagnetic wave shielding layer may be disposed above the central portion of the electromagnetic wave shielding layer 4 and another may be disposed below the central region.

In the third to twelfth embodiments, a plurality of light transmitting medium plates 3
A plurality of electromagnetic wave shielding layers are disposed between the electromagnetic wave shielding layers, and an air layer is formed between the electromagnetic wave shielding layers. However, as in the first embodiment, a translucent medium plate 3 having a relatively thick thickness is interposed between the plurality of electromagnetic wave shielding layers. You may employ the structure which made it.

In the above description of the first to twelfth embodiments, the case where the electromagnetic wave shielding body of the present invention is applied to an electromagnetic wave shielding window is exemplified. However, the present invention is limited to the application to the electromagnetic wave shielding window. For example, the present invention can be applied to an electromagnetic wave shield filter on a computer monitor screen or an opening / closing door of a microwave oven or the like.

[0070]

As described above, according to the present invention, since the electromagnetic wave absorbing layer for absorbing electromagnetic waves is provided at the edge of the electromagnetic wave shielding layer, a part of the multiple reflection by the electromagnetic wave shielding layer is absorbed. Therefore, there is an effect that the amount of electromagnetic wave leakage to the outside can be reduced.
For this reason, there is an effect that a sufficient electromagnetic wave shielding property can be exhibited without causing a decrease in light transmittance caused by making the mesh fine for the purpose of improving the electromagnetic wave shielding property. Further, when the present invention is applied to a window portion of a building so as to be applied to an electromagnetic wave shielding window, there is an effect that leakage of information due to electromagnetic wave radiation from inside the building can be reduced.

According to the present invention, at least a part of the plurality of electromagnetic wave shielding layers is provided non-parallel to each other,
Since the multiple reflection by the electromagnetic wave shielding layer can be efficiently guided to the electromagnetic wave absorbing layer side and absorbed, there is an effect that the intensity of the transmitted electromagnetic wave can be reduced.

According to the present invention, since at least a part of the plurality of electromagnetic wave shielding layers has a curved surface, the multiple reflection by the electromagnetic wave shielding layer can be efficiently guided to the electromagnetic wave absorbing layer side and absorbed. There is an effect that the intensity of the transmitted electromagnetic wave can be reduced.

According to the present invention, since at least a part of the plurality of electromagnetic wave shielding layers is sealed in the light transmitting medium plate, the electromagnetic wave shielding body can have an electromagnetic wave shielding function.

According to the present invention, by providing at least a part of the plurality of electromagnetic wave shielding layers between the plurality of light transmitting medium plates, there is an effect that the electromagnetic wave shielding body can have an electromagnetic wave shielding function.

According to the present invention, one electromagnetic wave shielding layer is installed parallel to the light transmitting medium plate, and the other electromagnetic wave shielding layer is installed at an angle θ with respect to the light transmitting medium plate. As a result, the multiple reflection layer is constituted by the electromagnetic wave shielding layer inclined at an angle θ, and the electromagnetic wave due to the multiple reflection between the multiple reflection layers can be guided in the spreading direction between the multiple reflection layers. There is an effect that the electromagnetic wave component due to multiple reflection can be absorbed by the electromagnetic wave absorbing layer provided at the edge of the layer.

According to the present invention, two electromagnetic wave shielding layers are provided in parallel to the light transmitting medium plate, and the other electromagnetic wave shielding layers are parallel to the light transmitting medium plate so as to form an angle θ. The multi-reflection layer is composed of the electromagnetic wave shielding layers inclined at an angle θ by being installed between the multiple electromagnetic wave shielding layers, and the electromagnetic wave component due to the multiple reflection between the multiple reflection layers can be guided in the spreading direction between the multiple reflection layers. The electromagnetic wave absorbing layer provided on the edge of the electromagnetic wave shielding layer as the reflecting layer has an effect that the electromagnetic wave component due to multiple reflection can be absorbed.

According to the present invention, two electromagnetic wave shielding layers are provided in parallel with the light transmitting medium plate, and the other plural electromagnetic wave shielding layers are sequentially arranged at an angle ± θ with respect to the light transmitting medium plate. The multiple reflection layers are composed of electromagnetic wave shielding layers inclined at an angle of ± θ by being installed between the parallel electromagnetic wave shielding layers so that the electromagnetic wave component due to multiple reflections at each multiple reflection layer spreads to each of the multiple reflection layers Since the electromagnetic wave can be guided in the direction, there is an effect that the electromagnetic wave component due to the multiple reflection can be absorbed by the electromagnetic wave absorption layer provided at the edge of the electromagnetic wave shielding layer as the multiple reflection layer.

According to the present invention, one electromagnetic wave shielding layer is provided in parallel with the translucent medium plate, another electromagnetic wave shielding layer is bent at an angle of π−2θ, and the bent portion is formed. By being adjacent to the electromagnetic wave shielding layer, a multiple reflection layer is formed with the bent portion as a boundary, and the electromagnetic wave component due to multiple reflection at each multiple reflection layer can be guided in the spreading direction of each of the multiple reflection layers, There is an effect that the electromagnetic wave component due to multiple reflection can be absorbed by the electromagnetic wave absorbing layer provided at the edge of the electromagnetic wave shielding layer as the multiple reflecting layer.

According to the present invention, one electromagnetic wave shielding layer is provided in parallel with the translucent medium plate, and the other n electromagnetic wave shielding layers are sequentially arranged as π-θ ₁ , π-θ ₂ ,. .., π-θ
_n (where θ ₁ <θ ₂ <... <θ _n ), and the bent portions of the n electromagnetic wave shielding layers are successively adjacent to each other at the same position of one electromagnetic wave shielding layer. Since 2n multiple reflection layers are formed at the boundaries of the bent portions of the n electromagnetic wave shielding layers, the electromagnetic waves due to multiple reflections at the multiple reflection layers can be guided in the respective spreading directions of the multiple reflection layers. Also, there is an effect that the electromagnetic wave component due to multiple reflection can be absorbed by the electromagnetic wave absorbing layer provided at the edge of the electromagnetic wave shielding layer as the multiple reflecting layer.

According to the present invention, one electromagnetic wave shielding layer is provided in parallel with the translucent medium plate, and the other 2n electromagnetic wave shielding layers are arranged in pairs to sequentially form π-θ ₁ , π−θ ₂ , ...
., Π-θ _n (where θ ₁ <θ ₂ <... <Θ _n ), and 2n multiple reflection layers Is composed,
Since the electromagnetic wave component due to multiple reflection at each multiple reflection layer can be guided in the spreading direction of the multiple reflection layer, the electromagnetic wave due to multiple reflection is provided by the electromagnetic wave absorption layer provided at the edge of the electromagnetic wave shielding layer as the multiple reflection layer. There is an effect that the amount can be absorbed.

According to the present invention, one electromagnetic wave shielding layer is provided in parallel with the translucent medium plate, and the other electromagnetic wave shielding layer is bent so that two concave curved surfaces are formed. By making the bent part adjacent to the electromagnetic wave shielding layer,
Since two multi-reflection layers are formed, and the electromagnetic wave components multiplexed in the respective reflection layers can be guided in the respective spreading directions of the multi-reflection layers, the edges of the electromagnetic wave shielding layer as the multi-reflection layers can be formed. There is an effect that the electromagnetic wave component due to multiple reflection can be absorbed by the provided electromagnetic wave absorbing layer.

According to the present invention, one electromagnetic wave shielding layer is
Installed in parallel with the translucent medium plate,
Fold the shielding layer to form two concave surfaces
The average curvature of each concave surface is σ₁,
σ_Two, ..., σ_n(However, σ₁ <Σ_Two<... <
σ_n) So that they are adjacent to each other at the same position of the electromagnetic wave shielding layer
By doing so, 2n multiple reflection layers are formed, and
The electromagnetic wave component due to multiplexing at each reflection layer is
Since it can be guided in each spreading direction, multiple
Electromagnetic wave absorption provided at the edge of the electromagnetic wave shielding layer as a radiation layer
The layer can absorb the electromagnetic wave component due to multiple reflection.
There is an effect that can be cut.

According to the present invention, one electromagnetic wave shielding layer is
Installed in parallel with the translucent medium plate,
Average curvature of the shielding layer is σ₁, Σ_Two, ..., σ_n(However
Then σ ₁<Σ_Two<... <σ_n)
Each of the electromagnetic wave shielding layers is a set of two electromagnetic wave shielding layers.
By adjoining at one position, 2n multiple reflective layers
And the multiplexed electromagnetic wave component in each reflection layer
It can be guided in each spreading direction of the multiple reflection layer
Therefore, it is provided at the edge of the electromagnetic wave shielding layer as a multiple reflection layer.
The electromagnetic wave component due to multiple reflections
There is an effect that can be made.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an internal configuration of an electromagnetic wave shield window according to Embodiment 1 of the present invention.

FIG. 2 is a side sectional view showing an internal configuration of an electromagnetic wave shielding window according to a second embodiment of the present invention.

FIG. 3A is a side sectional view showing an internal configuration of an electromagnetic wave shielding window according to Embodiment 3 of the present invention;
(B) is a front view showing the electromagnetic wave shielding window shown in (a).

FIG. 4 is a side sectional view showing a state of multiple reflection on an electromagnetic wave shielding layer in the electromagnetic wave shielding window shown in FIG.

FIG. 5 is a side sectional view showing an internal configuration of an electromagnetic wave shield window according to Embodiment 4 of the present invention.

FIG. 6 is a side sectional view showing an internal configuration of an electromagnetic wave shielding window according to a fifth embodiment of the present invention.

FIG. 7 is a side sectional view showing an internal configuration of an electromagnetic wave shielding window according to Embodiment 6 of the present invention.

FIG. 8 is a side sectional view showing an internal configuration of an electromagnetic wave shielding window according to a seventh embodiment of the present invention.

FIG. 9 is a side sectional view showing an internal configuration of an electromagnetic wave shielding window according to an eighth embodiment of the present invention.

FIG. 10 is a side sectional view showing an internal configuration of an electromagnetic wave shielding window according to Embodiment 9 of the present invention.

FIG. 11 is a side sectional view showing an internal configuration of an electromagnetic wave shielding window according to Embodiment 10 of the present invention.

FIG. 12 is a side sectional view showing an internal configuration of an electromagnetic wave shield window according to Embodiment 11 of the present invention.

FIG. 13 is a side sectional view showing an internal configuration of an electromagnetic wave shielding window according to a twelfth embodiment of the present invention.

14A is a side sectional view showing a configuration of a conventional electromagnetic wave shielding window, and FIG. 14B is a front view showing a configuration of the conventional electromagnetic wave shielding window shown in FIG.

FIG. 15 is a side sectional view showing a state of multiple reflection on an electromagnetic wave shielding layer in the conventional electromagnetic wave shielding window shown in FIG.

[Explanation of symbols]

1 electromagnetic wave shielding window, 2 window frame, 3 translucent medium plate,
4 First electromagnetic wave shielding layer, 5 Second electromagnetic wave shielding layer, 6
Ground, 7 incident electromagnetic wave, 8 transmitted electromagnetic wave, 9 electromagnetic wave absorbing layer, 10 air layer, 11, 12, 13, 14,
15 Electromagnetic wave shielding layer.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2E001 DH01 FA32 GA03 HA20 HC05 JC09 5E321 AA04 AA46 BB25 GG01 GG05 GG11 GH01

Claims (14)

[Claims] 1. An electromagnetic wave shield comprising: a plurality of electromagnetic wave shielding layers; and an electromagnetic wave absorbing layer disposed at an edge of the electromagnetic wave shielding layer and absorbing electromagnetic waves penetrating between the electromagnetic wave shielding layers. . 2. The electromagnetic wave shielding body according to claim 1, wherein at least a part of the plurality of electromagnetic wave shielding layers are provided non-parallel to each other. 3. The electromagnetic wave shield according to claim 1, wherein at least a part of the plurality of electromagnetic wave shielding layers has a curved surface. 4. The electromagnetic wave shield according to claim 1, wherein at least a part of the plurality of electromagnetic wave shielding layers is sealed in a translucent medium plate. . 5. The electromagnetic wave shield according to claim 1, wherein at least a part of the plurality of electromagnetic wave shielding layers is provided between the plurality of light transmitting medium plates. . 6. An electromagnetic wave shielding layer is provided in parallel with the light transmitting medium plate, and the other electromagnetic wave shielding layer is installed at an angle θ with respect to the light transmitting medium plate. The electromagnetic wave shield according to claim 2, wherein: 7. The two electromagnetic wave shielding layers are provided in parallel to the light transmitting medium plate, and the other electromagnetic wave shielding layer forms an angle θ with the light transmitting medium plate and is parallel to the electromagnetic wave shielding plate. The electromagnetic wave shield according to claim 2, wherein the electromagnetic wave shield is provided between layers. 8. The two electromagnetic wave shielding layers are provided in parallel with the light transmitting medium plate, and the other plural electromagnetic wave shielding layers form an angle ± θ with respect to the light transmitting medium plate sequentially, The electromagnetic wave shield according to claim 2, wherein the electromagnetic wave shield is provided between the parallel electromagnetic wave shielding layers. 9. One electromagnetic wave shielding layer is provided in parallel with the translucent medium plate, and the other electromagnetic wave shielding layer is π-2.
The electromagnetic wave shielding body according to claim 2, wherein the electromagnetic wave shielding body is bent at an angle of θ, and the bent portion is adjacent to the electromagnetic wave shielding layer. 10. One electromagnetic wave shielding layer is installed in parallel with the translucent medium plate, and the other n electromagnetic wave shielding layers are sequentially π-θ ₁ , π-θ ₂ ,. −θ _n (where θ ₁
<Θ ₂ <... <Θ _n ).
The electromagnetic wave shielding body according to claim 2, wherein each bent portion of the one electromagnetic wave shielding layer is sequentially adjacent to the one electromagnetic wave shielding layer at the same position. 11. One electromagnetic wave shielding layer is provided in parallel with the translucent medium plate, and the other 2n electromagnetic wave shielding layers are
Π-θ ₁ , π-θ ₂ ,..., Π-θ _n
3. The electromagnetic wave shield according to claim 2, wherein the electromagnetic wave shields are sequentially disposed at the same position on the one electromagnetic wave shielding layer so as to form an angle of θ ₁ <θ ₂ <... <Θ _n. body. 12. One electromagnetic wave shielding layer is provided in parallel with the translucent medium plate, and another electromagnetic wave shielding layer is bent so as to form two concave surfaces, and the bent portion is formed. The electromagnetic wave shield according to claim 3, wherein the electromagnetic wave shield is adjacent to the electromagnetic wave shielding layer. 13. One electromagnetic wave shielding layer is installed in parallel with the translucent medium plate, and the other plural electromagnetic wave shielding layers are bent to form two concave curved surfaces, respectively, and each bent portion is The average curvature of each concave surface is σ ₁ , σ ₂ ,.
·, Σ _{n (however, σ 1 <σ 2 <···} <σ n) and said are successively adjacent in the same position of the electromagnetic wave shielding layer to be characterized according to claim 3 electromagnetic shield according . 14. The electromagnetic wave shielding layer of one sheet disposed parallel to relative translucent medium plate, the other plurality of electromagnetic wave shielding layer ₁ mean curvature _{σ, σ 2, ···, σ} n ( provided that , Σ ₁ <σ
₂ ... <Σ _n ), wherein each of the electromagnetic wave shielding layers is adjacent to the same position of the one electromagnetic wave shielding layer in pairs. 3. The electromagnetic wave shield according to 3.