JPH1181518A - Electromagnetic wave shield panel - Google Patents
Electromagnetic wave shield panelInfo
- Publication number
- JPH1181518A JPH1181518A JP23684297A JP23684297A JPH1181518A JP H1181518 A JPH1181518 A JP H1181518A JP 23684297 A JP23684297 A JP 23684297A JP 23684297 A JP23684297 A JP 23684297A JP H1181518 A JPH1181518 A JP H1181518A
- Authority
- JP
- Japan
- Prior art keywords
- honeycomb
- electromagnetic wave
- shaped member
- honeycomb member
- surface materials
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Building Environments (AREA)
- Panels For Use In Building Construction (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は天井、床、壁、間仕
切りなどの建築用パネルとして用いられ、内部空間を電
磁波から遮蔽するための電磁波シールドパネルに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave shielding panel used for building panels such as ceilings, floors, walls, partitions, etc., for shielding an internal space from electromagnetic waves.
【０００２】[0002]
【従来の技術】従来は、金属や電磁波吸収材料を壁体表
面に張ることや壁体内に埋め混むことで電磁波シールド
が行われてきた。そのシールド材は導電性の金属や軟磁
性体のハーマロイ、フェライト等が用いられてきた。特
に電磁気吸収体として利用されているものがフェライト
ブロックである。又、電磁波遮蔽材および磁気遮蔽材で
形成されるパネル部材あるいはハニカム部材を組合せ
て、電磁波と磁気とを同時に遮蔽する提案もなされてい
る（実開平４−７６８１４号参照）。2. Description of the Related Art Conventionally, electromagnetic waves have been shielded by placing a metal or an electromagnetic wave absorbing material on the surface of a wall or by embedding it in the wall. As the shielding material, conductive metals, soft magnetic materials such as Hermalloy and ferrite have been used. In particular, a ferrite block is used as an electromagnetic absorber. It has also been proposed to simultaneously shield electromagnetic waves and magnetism by combining a panel member or a honeycomb member formed of an electromagnetic wave shielding material and a magnetic shielding material (see Japanese Utility Model Laid-Open No. 4-76814).
【０００３】上記従来の金属を表面に張るなど導電性を
与えて、電磁波を侵入させない方法では、電磁波を反射
させるものであるので、内部空間は電磁波の浸入がない
ものの、外部空間は反射された電磁波が存在し、悪影響
を与える問題があった。そこで、これを解決するために
電磁波を吸収させるアモルファス等の軟磁性体やフェラ
イトブロックが使用されいるが、アモルファス等の軟磁
性体を使用すると高価になり、安価なフェライトブロッ
クを使用すると、壁体に張り付けるなど、固定方法が問
題で施工性が悪く、その強度も十分ではない欠点があっ
た。又、これらの方法では十分な通気性を確保できない
という欠点があった。[0003] In the above-mentioned conventional method in which electromagnetic waves are not penetrated by imparting conductivity by, for example, stretching a metal on the surface, the electromagnetic waves are reflected. Therefore, although the internal space is free of electromagnetic waves, the external space is reflected. There was a problem that electromagnetic waves were present and had an adverse effect. In order to solve this problem, a soft magnetic material such as amorphous or a ferrite block that absorbs electromagnetic waves is used. However, using a soft magnetic material such as amorphous becomes expensive, and using an inexpensive ferrite block results in a wall structure. However, there was a drawback that the workability was poor due to the problem of the fixing method, such as sticking to, and the strength was not sufficient. In addition, these methods have a drawback that sufficient air permeability cannot be ensured.
【０００４】[0004]
【発明が解決しようとする課題】本発明は電磁波シール
ド材の保持が容易で、目的、コストに応じて電磁波シー
ルド材の種類および量を変更することができ、又、随時
通気性を確保できるパネルで、強度に優れ、品質が安定
し、施工が簡単なものを提供することを目的とする。SUMMARY OF THE INVENTION According to the present invention, a panel which can easily hold an electromagnetic wave shielding material, can change the type and amount of the electromagnetic wave shielding material according to the purpose and cost, and can ensure air permeability at any time. It is an object of the present invention to provide a material having excellent strength, stable quality, and easy construction.
【０００５】[0005]
【課題を解決するための手段】本発明は、２つの表面材
と、これらの間に介在されるハニカム状部材とからなる
パネルにおいて、ハニカム状部材内に電磁波を吸収する
シールド材が配されると共に前記表面材の少なくとも一
方が多孔質であることを特徴とする電磁波シールドパネ
ルである。According to the present invention, in a panel comprising two surface members and a honeycomb-like member interposed therebetween, a shielding member for absorbing electromagnetic waves is disposed in the honeycomb-like member. And at least one of the surface materials is porous.
【０００６】表面材の材質としては、アルミニウム合
金、チタン合金、鉄合金等の導電性金属板、セラミック
ス、樹脂、複合材料、セメント、ガラス発泡粒子などの
非導電性材料、さらには高電気抵抗材料などが用いられ
る。本発明では表面材の一方又は双方を多孔質の非導電
性材料をもって形成する。このようにすることによって
中間のハニカム状部材と共に通気性が与えられる。内装
材の場合は双方の表面材を多孔質とし、外装材の場合は
内面板のみを多孔質とするなどして組合せは適宜使いわ
ける。Examples of the surface material include conductive metal plates such as aluminum alloys, titanium alloys and iron alloys, non-conductive materials such as ceramics, resins, composite materials, cement, glass foam particles, and high electric resistance materials. Are used. In the present invention, one or both of the surface materials are formed of a porous non-conductive material. By doing so, air permeability is provided together with the intermediate honeycomb-shaped member. In the case of an interior material, both surface materials are made porous, and in the case of an exterior material, only the inner face plate is made porous, and the combination is appropriately used.
【０００７】電磁波を吸収するシールド材が配されるハ
ニカム状部材は、単位ハニカムのサイズがハニカムの内
径／高さで２．０以下であると良い。すなわち、ハニカ
ムの内径／高さが２．０以下とすることにより、浸入す
る電磁波の多くはハニカムと表面材とで反射する。より
好ましくはハニカムの内径／高さが１．０以下がよい。
ハニカムの高さが高いと電磁波を繰り返し反射するので
吸収する量が多くなり、反射する量を低減できる。これ
を図面で説明すると、図６において、１は表面材、２は
ハニカム状部材を示すが、単位ハニカムの内径ｄ1 ／高
さｔ＞１のＡ部分と、内径ｄ2 ／高さｔ＜１のｂ部分と
を比較すると、Ａ部分の電磁波は表面材とハニカムとに
直接反射する部分が多いのに対して、Ｂ部分は入射する
電磁波はハニカムの高さ部分と表面材部分とに亘って複
数回反射するため、Ｂ部分の方が電磁波を吸収する量が
多い。なお、下限については、特定されるものではな
く、電磁波を吸収するシールド材を配することができ、
また、電磁波を吸収できるものであればよいが、実用性
特にハニカムパネルとしての有用性があり、シールド材
を配するにあたっては、ハニカムの内径／高さが０．１
以上であることが好ましい。The honeycomb-shaped member provided with the shielding material for absorbing electromagnetic waves preferably has a unit honeycomb size of 2.0 or less in terms of the inner diameter / height of the honeycomb. That is, by setting the inner diameter / height of the honeycomb to 2.0 or less, most of the electromagnetic waves that penetrate are reflected by the honeycomb and the surface material. More preferably, the inner diameter / height of the honeycomb is 1.0 or less.
If the height of the honeycomb is high, the electromagnetic wave is repeatedly reflected, so that the amount of absorption increases, and the amount of reflection can be reduced. This will be described with reference to the drawings. In FIG. 6, reference numeral 1 denotes a surface material, 2 denotes a honeycomb-shaped member, and a portion A has an inner diameter d1 / height t> 1 of a unit honeycomb and an inner diameter d2 / height t <1. In comparison with the part b, the electromagnetic wave of the part A is directly reflected to the surface material and the honeycomb, whereas the electromagnetic wave of the part B is more than one in the height part and the surface material part of the honeycomb. Because the light is reflected twice, the portion B absorbs more electromagnetic waves. The lower limit is not specified, and a shielding material that absorbs electromagnetic waves can be provided.
Any material that can absorb electromagnetic waves may be used, but it has practical utility, particularly usefulness as a honeycomb panel. When disposing a shielding material, the inner diameter / height of the honeycomb is 0.1%.
It is preferable that it is above.
【０００８】ハニカム状部材に配するシールド材として
は、導電性塗料、軟磁性粉末塗料、フェライト、Ｍｎ系
ペロブスカイト導電性磁化物などが挙げられる。これら
は適宜塗装、充填などの方法で適用することができる。[0008] Examples of the shielding material provided on the honeycomb-shaped member include conductive paint, soft magnetic powder paint, ferrite, and Mn-based perovskite conductive magnetized material. These can be applied by a method such as painting or filling as appropriate.
【０００９】特に図５に示すようにハニカム状部材がア
ルミニウム又はアルミニウム合金よりなり、その表面に
陽極酸化皮膜が形成されていると共に、その孔部３に電
磁波を吸収する磁性体粒子４が存在しているものが有効
である。In particular, as shown in FIG. 5, the honeycomb member is made of aluminum or an aluminum alloy, has an anodic oxide film formed on its surface, and has magnetic particles 4 for absorbing electromagnetic waves in its holes 3. Are valid.
【００１０】本発明では、電磁波シールド材をハニカム
パネルのハニカム状部材に配することによって施工性を
上げることができると共に、ハニカム構造としたことに
より強度も得られる。さらに通気性、電磁波吸収性およ
び遮蔽性を目的に応じて容易に変化させることができ
る。又、適宜通気性構造をとることができるので、内装
材としても有効である。In the present invention, the workability can be improved by disposing the electromagnetic wave shielding material on the honeycomb-shaped members of the honeycomb panel, and the strength can be obtained by adopting the honeycomb structure. Further, the air permeability, electromagnetic wave absorption and shielding properties can be easily changed according to the purpose. Moreover, since it can take a breathable structure appropriately, it is also effective as an interior material.
【００１１】電磁波シールド材をハニカムパネルのハニ
カム状部材に配する手段としては、まず第１に、ハニカ
ム状部材をアルミニウム又はアルミニウム合金とし、そ
の表面に陽極酸化皮膜を形成し、陽極酸化皮膜の孔部に
電磁波を吸収する磁性体粒子を配するもの、第２に、２
つの表面材とこれらの間に介在されるハニカム状部材と
によって形成される空間に、電磁波を吸収するシールド
材を配するものとがある。As means for disposing the electromagnetic wave shielding material on the honeycomb-shaped member of the honeycomb panel, first, the honeycomb-shaped member is made of aluminum or an aluminum alloy, an anodic oxide film is formed on the surface thereof, and the holes of the anodic oxide film are formed. Magnetic particles that absorb electromagnetic waves are disposed in the part,
There is a type in which a shielding material that absorbs electromagnetic waves is disposed in a space formed by two surface materials and a honeycomb-shaped member interposed therebetween.
【００１２】[0012]
【発明の実施の形態】以下、図面に基づいて本発明の実
施の形態を説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１３】図１は、本発明でハニカム状部材２にシー
ルド材が充填されていない状態を示す一部切欠斜視図で
ある。表面材１，１の間にハニカム状部材２を介装し接
合材５をもってサンドイッチ状に形成したものである。
図２は側面図を示す。図３は図１のIII−III断面図で、
ハニカム状部材２の内側にシールド材６を充填した状態
を示す。FIG. 1 is a partially cutaway perspective view showing a state in which a honeycomb-shaped member 2 is not filled with a shielding material in the present invention. A honeycomb-shaped member 2 is interposed between the surface materials 1 and 1, and a joining material 5 is formed in a sandwich shape.
FIG. 2 shows a side view. FIG. 3 is a sectional view taken along the line III-III of FIG.
The state where the inside of the honeycomb-shaped member 2 is filled with the shielding material 6 is shown.
【００１４】図３に基づいて外装パネルの構成について
説明すると、外側表面材１−１としては多孔質非導電性
材料（例えば多孔質セラミックス）を用い、内側表面材
１−２としては緻密質導電性材料（例えばアルミニウム
板、ステンレス板）を用いる。ハニカム状部材２の内側
にはシールド材６（例えばフェライト粉末、フェライト
焼結体）を充填する。５は接合材であるがシールド部材
６として接着性のある材料（例えばエポキシ系接着剤と
フェライト粉を混合したもの）を用いる場合は、接合材
５は省略することができる。外側表面材１−１の多孔質
非導電性材料は外からの電磁波をハニカム状部材２の中
に取り込みハニカム状部材２内で減衰させる。この外装
パネルはそのまま建物の外装とするため化粧タイル状の
外側表面材としてもよい。その材質はさきに例示した材
料を適宜用いるが、例えば廃ガラス（カレット）を原料
としたガラス発泡粒子を板状に成形した表面材を用いて
もよい。内側表面材１−２は緻密質導電性材料（例えば
アルミニウム板、ステンレス板）で構成し、ハニカム状
部材２内に侵入した電磁波が室内側に侵入しないように
遮蔽する。The structure of the exterior panel will be described with reference to FIG. 3. A porous non-conductive material (for example, porous ceramics) is used as the outer surface material 1-1, and a dense conductive material is used as the inner surface material 1-2. A conductive material (for example, an aluminum plate or a stainless steel plate) is used. The inside of the honeycomb-shaped member 2 is filled with a shielding material 6 (for example, ferrite powder or sintered ferrite). Reference numeral 5 denotes a bonding material, but when an adhesive material (for example, a mixture of an epoxy-based adhesive and ferrite powder) is used as the shielding member 6, the bonding material 5 can be omitted. The porous non-conductive material of the outer surface material 1-1 takes in electromagnetic waves from the outside into the honeycomb-shaped member 2 and attenuates the same in the honeycomb-shaped member 2. This exterior panel may be used as an exterior surface material in the form of a decorative tile to be used as an exterior of a building as it is. As the material, the materials exemplified above are appropriately used. For example, a surface material formed by molding foamed glass particles using waste glass (cullet) as a raw material into a plate shape may be used. The inner surface material 1-2 is made of a dense conductive material (for example, an aluminum plate or a stainless steel plate), and shields the electromagnetic waves that have entered the honeycomb-shaped member 2 from entering the room.
【００１５】図４は室内に存在する電磁波に対応させる
ように構成した内装パネルの構成例で（なお、図１のIV
−IV線をもとにした断面図である。）、表面材１，１は
いずれも多孔質非導電性材料をもって構成し、いずれ表
面材側からも電磁波をハニカム状部材２内に取込めるよ
うにしてある。ハニカム状部材２内に侵入した電磁波
は、ハニカム状部材２内に充填したシールド材６によっ
て吸収される。FIG. 4 shows an example of the configuration of an interior panel configured to cope with an electromagnetic wave existing in a room (the IV in FIG. 1).
It is sectional drawing based on the -IV line. ), Each of the surface materials 1 and 1 is made of a porous non-conductive material so that electromagnetic waves can be taken into the honeycomb-shaped member 2 from the surface material side. The electromagnetic wave that has entered the honeycomb-shaped member 2 is absorbed by the shield material 6 filled in the honeycomb-shaped member 2.
【００１６】[0016]
【実施例】内側表面材に厚さ２ｍｍのアルミニウム板
を、ハニカム状部材には高さ５０ｍｍハニカム単位内径
約１０ｍｍのアルミニウム合金材を、外側表面材には厚
さ１４ｍｍの化粧タイル（窯業系サイディング）を用い
た。内側表面材にハニカム状部材とを接合材により接合
した後、フェライト樹脂複合材（厚さ１０ｍｍ）を電磁
波吸収材としてハニカム状部材中に埋め込み最後に外側
表面材を張り付けた。上記ハニカム状部材は陽極酸化処
理を施してあって、その陽極酸化皮膜の孔内にＣｏ、Ｎ
ｉ等の磁性体を入れることで、ハニカム状部材そのもの
にも電磁波吸収能をもたせ、上記フェライト樹脂複合材
と共に、電磁波を有効に吸収する。DESCRIPTION OF THE PREFERRED EMBODIMENTS A 2 mm-thick aluminum plate is used for the inner surface material, a 50 mm-high aluminum alloy material having a honeycomb unit inner diameter of about 10 mm is used for the honeycomb member, and a 14 mm-thick decorative tile (ceramic siding) is used for the outer surface material ) Was used. After bonding the honeycomb-shaped member to the inner surface member with a bonding material, the ferrite resin composite material (thickness: 10 mm) was embedded in the honeycomb-shaped member as an electromagnetic wave absorbing material, and finally the outer surface member was adhered. The honeycomb-shaped member has been subjected to anodizing treatment, and Co, N
By incorporating a magnetic material such as i, the honeycomb-shaped member itself has an electromagnetic wave absorbing ability, and effectively absorbs electromagnetic waves together with the ferrite resin composite material.
【００１７】[0017]
【発明の効果】本発明によれば、シールド材料の保持が
容易で安全性が高く、安定した電磁波シールド性能が得
られる。ハニカム状部材内の電磁波シールド材の材質や
量、組合せを変えることで、コストや性能を容易に調整
することができる。ハニカムサンドイッチ構造をとって
いるので、軽量、高剛性であり、施工が容易である。
又、ハニカムの内径／高さを測定することによって、電
磁波の有効な吸収を達成する。さらにパネルに通気性を
与えることも容易である。According to the present invention, the holding of the shielding material is easy, the safety is high, and stable electromagnetic wave shielding performance can be obtained. The cost and performance can be easily adjusted by changing the material, amount and combination of the electromagnetic wave shielding material in the honeycomb member. Since it has a honeycomb sandwich structure, it is lightweight, highly rigid, and easy to construct.
Also, by measuring the inner diameter / height of the honeycomb, effective absorption of electromagnetic waves is achieved. Further, it is easy to give the panel air permeability.
【図１】本発明の基礎となるハニカムサンドイッチ構造
を示す一部切欠斜視図である。FIG. 1 is a partially cutaway perspective view showing a honeycomb sandwich structure on which the present invention is based.
【図２】図１の一部側面図を示す。FIG. 2 shows a partial side view of FIG. 1;
【図３】外装パネルについて図１のIII−IIIの一部断面
図を示す。FIG. 3 is a partial cross-sectional view of the exterior panel taken along line III-III of FIG. 1;
【図４】内装パネルについての断面図を示す。FIG. 4 shows a cross-sectional view of the interior panel.
【図５】ハニカム状部材の陽極酸化皮膜の孔部に磁性体
粒子を充填した説明図である。FIG. 5 is an explanatory view in which holes of an anodic oxide film of a honeycomb-shaped member are filled with magnetic particles.
【図６】ハニカム状部材の高さと電磁波の反射との関係
を示す説明図である。FIG. 6 is an explanatory diagram showing a relationship between a height of a honeycomb-shaped member and reflection of an electromagnetic wave.
１ 表面材 １−１ 外側表面材 １−２ 内側表面材 ２ ハニカム状部材 ３ 孔部 ４ 磁性体粒子 ５ 接合材 ６ シールド材 DESCRIPTION OF SYMBOLS 1 Surface material 1-1 Outer surface material 1-2 Inner surface material 2 Honeycomb-shaped member 3 Hole part 4 Magnetic material particle 5 Joining material 6 Shield material
───────────────────────────────────────────────────── フロントページの続き (72)発明者 風間 典昭 宮城県仙台市青葉区国見１丁目12−８ (72)発明者 林 則茂 香川県坂出市府中町南谷4806−３ (72)発明者 松原 勇 大阪府大阪市中央区鎗屋町２−４−５ ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Noriaki Kazama 1-12-8 Kunimi, Aoba-ku, Sendai, Miyagi Prefecture 2-4-5 Yariyacho, Chuo-ku, Osaka-shi, Osaka
Claims (6)
るハニカム状部材とからなるパネルにおいて、ハニカム
状部材に電磁波を吸収するシールド材が配されると共
に、前記表面材の少なくとも一方が多孔質であることを
特徴とする電磁波シールドパネル。1. A panel comprising two surface materials and a honeycomb-shaped member interposed therebetween, wherein a honeycomb-shaped member is provided with a shielding material for absorbing electromagnetic waves, and at least one of the surface materials is provided. An electromagnetic wave shielding panel characterized by being porous.
電性材料から形成され、他方が緻密質の導電性材料から
形成されてなる請求項１記載の電磁波シールドパネル。2. The electromagnetic wave shield panel according to claim 1, wherein one of the two surface materials is formed of a porous non-conductive material, and the other is formed of a dense conductive material.
材料から形成されてなる請求項１記載の電磁波シールド
パネル。3. The electromagnetic wave shield panel according to claim 1, wherein both of the two surface materials are formed of a porous non-conductive material.
高さが２．０以下である請求項１ないし３のいずれかに
記載の電磁波シールドパネル。4. The inner diameter of a unit honeycomb of a honeycomb-shaped member /
The electromagnetic wave shield panel according to any one of claims 1 to 3, wherein the height is 2.0 or less.
ミニウム合金よりなり、その表面に陽極酸化皮膜が形成
されていると共に、陽極酸化皮膜の孔部に電磁波を吸収
する磁性体粒子が存在している請求項１ないし４のいず
れかに記載の電磁波シールドパネル。5. The honeycomb-shaped member is made of aluminum or an aluminum alloy, an anodic oxide film is formed on the surface thereof, and magnetic particles for absorbing electromagnetic waves are present in pores of the anodic oxide film. 5. The electromagnetic wave shield panel according to any one of 1 to 4.
ハニカム状部材とによって形成される空間に、電磁波を
吸収するシールド材が配されている請求項１ないし４の
いずれかに記載の電磁波シールドパネル。6. The shielding material according to claim 1, wherein a shielding material for absorbing electromagnetic waves is disposed in a space formed by the two surface materials and the honeycomb-shaped member interposed therebetween. Electromagnetic wave shield panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23684297A JPH1181518A (en) | 1997-09-02 | 1997-09-02 | Electromagnetic wave shield panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23684297A JPH1181518A (en) | 1997-09-02 | 1997-09-02 | Electromagnetic wave shield panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1181518A true JPH1181518A (en) | 1999-03-26 |
Family
ID=17006609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23684297A Pending JPH1181518A (en) | 1997-09-02 | 1997-09-02 | Electromagnetic wave shield panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1181518A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100361679B1 (en) * | 2000-04-24 | 2002-11-23 | (주)한국조형종합건축사사무소 | Sandwich panel having a prevention effect of electromagnetic wave and process for manufacturing it |
| JP2007299907A (en) * | 2006-04-28 | 2007-11-15 | Nitto Denko Corp | Structure having property of conducting or absorbing electromagnetic wave |
| KR100835658B1 (en) * | 2006-09-05 | 2008-06-09 | 최재철 | Electro-magnetic wave absorber and it's construction method |
| CN107465001A (en) * | 2016-06-06 | 2017-12-12 | 邵波 | A kind of hidden method and device |
| CN116696142A (en) * | 2023-08-03 | 2023-09-05 | 晋江市高威电磁科技股份有限公司 | High-strength composite shielding material for manufacturing large electromagnetic shielding command tent |
-
1997
- 1997-09-02 JP JP23684297A patent/JPH1181518A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100361679B1 (en) * | 2000-04-24 | 2002-11-23 | (주)한국조형종합건축사사무소 | Sandwich panel having a prevention effect of electromagnetic wave and process for manufacturing it |
| JP2007299907A (en) * | 2006-04-28 | 2007-11-15 | Nitto Denko Corp | Structure having property of conducting or absorbing electromagnetic wave |
| KR100835658B1 (en) * | 2006-09-05 | 2008-06-09 | 최재철 | Electro-magnetic wave absorber and it's construction method |
| CN107465001A (en) * | 2016-06-06 | 2017-12-12 | 邵波 | A kind of hidden method and device |
| CN116696142A (en) * | 2023-08-03 | 2023-09-05 | 晋江市高威电磁科技股份有限公司 | High-strength composite shielding material for manufacturing large electromagnetic shielding command tent |
| CN116696142B (en) * | 2023-08-03 | 2023-10-03 | 晋江市高威电磁科技股份有限公司 | High-strength composite shielding material for manufacturing large electromagnetic shielding command tent |
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