JP3097343B2 - Thin radio wave absorber - Google Patents
Thin radio wave absorberInfo
- Publication number
- JP3097343B2 JP3097343B2 JP04226546A JP22654692A JP3097343B2 JP 3097343 B2 JP3097343 B2 JP 3097343B2 JP 04226546 A JP04226546 A JP 04226546A JP 22654692 A JP22654692 A JP 22654692A JP 3097343 B2 JP3097343 B2 JP 3097343B2
- Authority
- JP
- Japan
- Prior art keywords
- radio wave
- wave absorber
- thin
- electromagnetic wave
- absorber according
- 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.)
- Expired - Fee Related
Links
Landscapes
- Aerials With Secondary Devices (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、レーダゴースト防止
（偽像防止）、構造物からの電磁波の散乱等の反射防止
に用いられる薄型電波吸収体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin radio wave absorber used for preventing radar ghost (preventing false images) and preventing reflection of electromagnetic waves from a structure.
【０００２】[0002]
【従来の技術】近年、電波の利用が進むにつれて、電波
障害、電波による誤動作等の問題がしばしば発生してい
る。このような問題を解決する対策として、薄型電波吸
収体を電波の反射、散乱等が大きい構造物に装着するこ
とが行われており、これによってその構造物からの電波
散乱を抑える等して大きな効果を奏している。2. Description of the Related Art In recent years, as the use of radio waves has progressed, problems such as radio interference and malfunctions due to radio waves have often occurred. As a countermeasure to solve such a problem, a thin radio wave absorber is mounted on a structure that has a large amount of radio wave reflection and scattering, thereby suppressing radio wave scattering from the structure. It has an effect.
【０００３】薄型電波吸収体は、一般に、例えばフェラ
イト等の磁性損失材又はカーボン等のオーム損失材をゴ
ム、樹脂等の保持材に混合させてなる電波吸収材とその
裏面に配置される金属等の電波反射体とから構成され
る。このような薄型電波吸収体を構造物に装着する場
合、構造物の形状が多様であることからその形状に適合
するように柔軟性のある電波吸収体を用いることが要求
される。A thin radio wave absorber generally comprises a radio wave absorber obtained by mixing a magnetic loss material such as ferrite or an ohmic loss material such as carbon with a holding material such as rubber or resin, and a metal or the like disposed on the back surface thereof. And a radio wave reflector. When such a thin radio wave absorber is attached to a structure, it is required to use a flexible radio wave absorber so as to conform to the shape of the structure because the shape of the structure is various.
【０００４】薄型電波吸収体を構造物（一般には金属
体）に装着させる方法として、電波反射体のない柔軟な
電波吸収材を接着剤等によりその構造物（金属体）に直
接的に装着し、その構造物を電波反射体として利用する
方法、及び柔軟な電波吸収材に金属箔等の電波反射体を
あらかじめ裏打ちしたものを構造物に装着する方法があ
る。As a method of attaching a thin radio wave absorber to a structure (generally a metal body), a flexible radio wave absorber without a radio wave reflector is directly attached to the structure (metal body) with an adhesive or the like. There is a method in which the structure is used as a radio wave reflector, and a method in which a radio wave reflector such as a metal foil is backed in advance with a flexible radio wave absorbing material is attached to the structure.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、電波吸
収材を構造物に直接的に接着する方法においては、電波
吸収材と構造物との間の接着層の厚さが電波吸収性能に
影響するため、接着層の厚さを制御して装着する必要が
あり、電波吸収材の装着作業は容易ではない。However, in the method of directly bonding the radio wave absorbing material to the structure, the thickness of the adhesive layer between the radio wave absorbing material and the structure affects the radio wave absorbing performance. In addition, it is necessary to control the thickness of the adhesive layer before mounting, and it is not easy to mount the radio wave absorber.
【０００６】また、電波吸収材と電波反射体とをあらか
じめ一体化しておく従来技術には、電波反射体として、
金属箔、金属蒸着フィルム、金属繊維布、炭素繊維布、
又は金属めっきガラス繊維布等を用いる方法がある。In the prior art in which a radio wave absorbing material and a radio wave reflector are integrated in advance, a radio wave reflector is used.
Metal foil, metallized film, metal fiber cloth, carbon fiber cloth,
Alternatively, there is a method using a metal-plated glass fiber cloth or the like.
【０００７】しかしながら、金属箔を用いた場合、これ
がほとんど伸縮しないものであるため、電波吸収材と一
体化して折り曲げ等を行うと金属箔にしわや亀裂を生じ
これが損傷してしまう。However, when a metal foil is used, it hardly expands and contracts. Therefore, if it is integrated with a radio wave absorber and bent or the like, the metal foil will be wrinkled or cracked and damaged.
【０００８】金属蒸着フィルムを用いた場合、蒸着膜が
折り曲げ等により損傷しやすく、しかも電波吸収材と一
体化したときにフィルムに伸縮性がないので柔軟性が劣
化してしまう。When a metal vapor-deposited film is used, the vapor-deposited film is easily damaged by bending or the like, and the flexibility is deteriorated because the film has no elasticity when integrated with a radio wave absorbing material.
【０００９】金属繊維布を用いた場合、繊維が金属であ
ることから折り曲げを行うと復元しにくく、加工性に問
題がある。また、折り曲げ等を行うと金属箔と同様にし
わが入ってしまう。When a metal fiber cloth is used, since the fiber is metal, it is difficult to recover when the fiber is folded, and there is a problem in workability. In addition, when bending or the like is performed, wrinkles are formed as in the case of metal foil.
【００１０】炭素繊維布、金属めっきガラス繊維布を用
いた場合、電波吸収材と繊維布とを加熱して一体成形す
ると、繊維布の熱膨張率が電波吸収体のそれに対して小
さいことから電波吸収体が変形するという問題がある。When a carbon fiber cloth or a metal-plated glass fiber cloth is used, when the radio wave absorber and the fiber cloth are integrally formed by heating, the coefficient of thermal expansion of the fiber cloth is smaller than that of the radio wave absorber. There is a problem that the absorber is deformed.
【００１１】従って本発明は、従来技術の上述の問題点
を解決するためになされたものであり、電波反射体を一
体化してなり柔軟性を有する薄型電波吸収体を提供する
ものである。Accordingly, the present invention has been made to solve the above-mentioned problems of the prior art, and provides a thin electromagnetic wave absorber having flexibility by integrating a radio wave reflector.
【００１２】[0012]
【課題を解決するための手段】本発明によれば、電磁波
エネルギ損失材と保持材とを混合してなる可撓性のシー
ト状電波吸収層と、このシート状電波吸収層の裏面に積
層されており、有機繊維布に高導電性金属材料を無電解
めっきしてなり、表面抵抗が０．５Ω／□以下である電
波反射層とを備えた薄型電波吸収体が提供される。According to the present invention, there is provided a flexible sheet-shaped radio wave absorbing layer formed by mixing an electromagnetic wave energy loss material and a holding material, and laminated on the back surface of the sheet-shaped radio wave absorbing layer. and which, Ri Na electrolessly deposited highly conductive metallic material to the organic fiber cloth, thin wave absorber surface resistance and a 0.5 .OMEGA / □ or less der Ru radio wave reflecting layer is provided.
【００１３】シート状電波吸収層の前面に被着された有
機高分子フィルム又は有機塗膜等の有機保護膜をさらに
備えることが好ましい。It is preferable to further include an organic protective film such as an organic polymer film or an organic coating film applied on the front surface of the sheet-like electromagnetic wave absorbing layer.
【００１４】[0014]
【００１５】高導電性金属材料は、ニッケル、銅、又は
銀を含むことが好ましい。The highly conductive metal material preferably contains nickel, copper, or silver.
【００１６】[0016]
【作用】電波反射層として、導電性有機繊維布にニッケ
ル、銅、又は銀等の高導電性金属材料を無電解めっきし
て表面抵抗が０．５Ω／□以下という高導電性を実現し
ているため、充分な電波反射特性を有しておりかつ有機
繊維布という基材を用いているので伸縮性に富み折り曲
げ等に強くしかも電波吸収材との一体化も容易に行え
る。従ってこのような電波反射層を用いて電波吸収体を
形成することにより、柔軟性を有し曲面部への装着が容
易な薄型電波吸収体が得られる。[Function] As a radio wave reflection layer, a highly conductive metal material such as nickel, copper, or silver is electrolessly plated on a conductive organic fiber cloth to achieve a high conductivity of 0.5Ω / □ or less. Since it has sufficient radio wave reflection characteristics and uses a base material of an organic fiber cloth, it has high elasticity, is strong in bending and the like, and can be easily integrated with a radio wave absorbing material. Therefore, by forming a radio wave absorber using such a radio wave reflection layer, a thin radio wave absorber having flexibility and easy to be mounted on a curved surface portion can be obtained.
【００１７】[0017]
【実施例】以下図面を用いて本発明の実施例を詳細に説
明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１８】図１は、本発明の一実施例である薄型電波
吸収体の斜視図である。FIG. 1 is a perspective view of a thin radio wave absorber according to an embodiment of the present invention.
【００１９】同図において、１０は磁性損失材であるフ
ェライトの粉末を保持材であるゴムに混合させてなる可
撓性を有するシート状の電波吸収層である。この電波吸
収層１０は、厚さ２．５ｍｍに形成されており、その裏
面には電波反射層１１が一体的に積層形成されている。
この電波反射層１１は、ポリエステル繊維布にニッケル
及び銅を無電解めっきを施してなり、その表面抵抗は本
実施例では０．１Ω／□以下に設定されている。In FIG. 1, reference numeral 10 denotes a flexible sheet-like radio wave absorbing layer obtained by mixing ferrite powder as a magnetic loss material with rubber as a holding material. The radio wave absorbing layer 10 is formed to have a thickness of 2.5 mm, and a radio wave reflecting layer 11 is integrally formed on the back surface thereof.
The radio wave reflection layer 11 is formed by electroless plating nickel and copper on a polyester fiber cloth, and the surface resistance is set to 0.1 Ω / □ or less in this embodiment.
【００２０】図２は、図１の実施例の薄型電波吸収体に
おける周波数対反射係数の特性を示している。同図から
も明らかのように、本実施例の薄型電波吸収体は、特に
ほぼ１０ＧＨｚ付近で大きな減衰量を備えている優れた
電波吸収特性を有している。FIG. 2 shows the characteristics of frequency versus reflection coefficient in the thin radio wave absorber of the embodiment of FIG. As is clear from the figure, the thin radio wave absorber of this embodiment has an excellent radio wave absorption characteristic having a large attenuation particularly at about 10 GHz.
【００２１】この薄型電波吸収体を、図３に示すよう
に、直径３０ｍｍ（３０φ）の円筒棒１２に巻付けて曲
げた後、特性及び外観の評価を再度行ったが、巻付け前
と全く変わらなかった。As shown in FIG. 3, the thin electromagnetic wave absorber was wound around a cylindrical rod 12 having a diameter of 30 mm (30φ) and bent, and then the characteristics and appearance were evaluated again. It did not change.
【００２２】一方、図１の実施例における電波吸収層１
０と同様の電波吸収層に厚さ２５μｍのアルミ箔を一体
化して積層形成した電波吸収体を、この円筒棒１２に巻
付けて曲げた後、特性及び外観の評価を行うと、電波反
射層であるアルミ箔に亀裂が生じた。On the other hand, the radio wave absorbing layer 1 in the embodiment of FIG.
After the electromagnetic wave absorber formed by laminating an aluminum foil having a thickness of 25 μm on the same electromagnetic wave absorbing layer as that of the electromagnetic wave absorbing layer was wound around the cylindrical rod 12 and bent, the characteristics and appearance were evaluated. Cracked in the aluminum foil.
【００２３】図４は、本発明の他の実施例である薄型電
波吸収体の斜視図である。FIG. 4 is a perspective view of a thin radio wave absorber according to another embodiment of the present invention.
【００２４】この実施例では、図１の実施例と同様の電
波吸収層１０の裏面に電波反射層１１を一体的に積層形
成し、さらに電波吸収層１０の表面に有機保護膜１３を
積層したものである。有機保護膜１３は、本実施例では
厚さ５０μｍのフッ素系樹脂から形成されており、電波
吸収層１０の表面を保護するものである。In this embodiment, a radio wave reflection layer 11 is integrally formed on the back surface of a radio wave absorption layer 10 similar to the embodiment of FIG. 1, and an organic protective film 13 is further laminated on the surface of the radio wave absorption layer 10. Things. In the present embodiment, the organic protective film 13 is formed of a 50 μm-thick fluorine-based resin, and protects the surface of the radio wave absorbing layer 10.
【００２５】図５は、図４の実施例の薄型電波吸収体に
おける周波数対反射係数の特性を示している。同図から
も明らかのように、本実施例の薄型電波吸収体は、特に
ほぼ１０ＧＨｚ付近で大きな減衰量を備えている優れた
電波吸収特性を有している。FIG. 5 shows the characteristics of frequency versus reflection coefficient in the thin radio wave absorber of the embodiment of FIG. As is clear from the figure, the thin radio wave absorber of this embodiment has an excellent radio wave absorption characteristic having a large attenuation particularly at about 10 GHz.
【００２６】本実施例の作用効果は、図１の実施例とほ
ぼ同様である。The operation and effect of this embodiment are almost the same as those of the embodiment of FIG.
【００２７】上述した実施例では、電波吸収層１０とし
て、磁性損失材であるフェライトを用いているが、これ
は例えばカーボン等のオーム損失材又は他の損失材を用
いてもよいことは明らかである。保持材も電波吸収層が
可撓性となるようなものであればどのようなものであっ
てもよい。In the above-described embodiment, ferrite, which is a magnetic loss material, is used as the radio wave absorbing layer 10, but it is obvious that an ohmic loss material such as carbon or another loss material may be used. is there. The holding material may be any material as long as the radio wave absorbing layer becomes flexible.
【００２８】また、電波反射層１１として、ポリエステ
ル繊維布とは異なる有機繊維布を用いてもよいし、ニッ
ケル及び銅の他に銀を無電解めっきしてもよい。As the radio wave reflection layer 11, an organic fiber cloth different from the polyester fiber cloth may be used, or silver may be electrolessly plated in addition to nickel and copper.
【００２９】さらに、有機保護膜１３として、フッ素系
樹脂とは異なる有機高分子フィルム、有機塗膜を用いて
もよい。Further, as the organic protective film 13, an organic polymer film or an organic coating film different from the fluorine-based resin may be used.
【００３０】[0030]
【発明の効果】以上詳細に説明したように本発明では、
電磁波エネルギ損失材と保持材とを混合してなる可撓性
のシート状電波吸収層と、このシート状電波吸収層の裏
面に積層されており、有機繊維布に高導電性金属材料を
無電解めっきしてなり、表面抵抗が０．５Ω／□以下で
ある電波反射層とを備えている。このように、電波反射
層は０．５Ω／□以下という高導電性を実現しているた
め、充分な電波反射特性を有しており、このような電波
反射層を用いていることにより電波吸収性能の非常に高
い電波吸収体を構成することができる。また、電波反射
層が電波吸収層と一体化しているので電波吸収体と被着
体間の接着厚さの精度が要求されず、しかも柔軟性を有
しているので施工が行い易く曲面部への装着が非常に容
易となる。As described in detail above, in the present invention,
A flexible sheet-shaped radio wave absorption layer made by mixing an electromagnetic wave energy loss material and a holding material, and a high conductive metal material is electrolessly laminated on an organic fiber cloth laminated on the back surface of the sheet-shaped radio wave absorption layer. plated to Ri Na, a surface resistance of 0.5Ω / □ in the following
Oh Ru and a radio wave reflection layer. Thus, radio wave reflection
The layer realizes high conductivity of 0.5Ω / □ or less.
And has sufficient radio wave reflection characteristics.
Extremely high radio wave absorption performance due to the use of a reflective layer
A new radio wave absorber. Also, radio wave reflection
Since the layer is integrated with the radio wave absorbing layer, the accuracy of the adhesive thickness between the radio wave absorber and the adherend is not required, and since it has flexibility, it is easy to perform and it is very difficult to attach it to a curved surface. Will be easier.
【図１】本発明の一実施例である薄型電波吸収体の斜視
図である。FIG. 1 is a perspective view of a thin radio wave absorber according to one embodiment of the present invention.
【図２】図１の実施例における周波数対反射係数の特性
図である。FIG. 2 is a characteristic diagram of frequency versus reflection coefficient in the embodiment of FIG.
【図３】図１の実施例の薄型電波吸収体を円筒棒に巻付
けて曲げた状態を表す斜視図である。FIG. 3 is a perspective view showing a state in which the thin radio wave absorber of the embodiment of FIG. 1 is wound around a cylindrical rod and bent.
【図４】本発明の他の実施例である薄型電波吸収体の斜
視図である。FIG. 4 is a perspective view of a thin radio wave absorber according to another embodiment of the present invention.
【図５】図４の実施例における周波数対反射係数の特性
図である。5 is a characteristic diagram of frequency versus reflection coefficient in the embodiment of FIG.
１０ 電波吸収層 １１ 電波反射層 １２ 円筒棒 １３ 有機保護膜 Reference Signs List 10 radio wave absorption layer 11 radio wave reflection layer 12 cylindrical rod 13 organic protective film
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−167893（ＪＰ，Ａ) 特開 昭60−57700（ＪＰ，Ａ) 特開 昭59−47707（ＪＰ，Ａ) 特開 昭61−253373（ＪＰ，Ａ) 特開 平４−153034（ＪＰ，Ａ) 特開 平４−340299（ＪＰ，Ａ) 特開 平１−107598（ＪＰ，Ａ) 実開 昭59−171397（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H05K 9/00 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-1677893 (JP, A) JP-A-60-57700 (JP, A) JP-A-59-47707 (JP, A) JP-A-61-47707 253373 (JP, A) JP-A-4-153034 (JP, A) JP-A-4-340299 (JP, A) JP-A-1-107598 (JP, A) Japanese Utility Model Laid-Open No. 59-171397 (JP, U) (58) Field surveyed (Int. Cl. 7 , DB name) H05K 9/00
Claims (7)
してなる可撓性のシート状電波吸収層と、該シート状電
波吸収層の裏面に積層されており、有機繊維布に高導電
性金属材料を無電解めっきしてなり、表面抵抗が０．５
Ω／□以下である電波反射層とを備えたことを特徴とす
る薄型電波吸収体。1. A flexible sheet-like radio wave absorbing layer obtained by mixing an electromagnetic wave energy loss material and a holding material, and laminated on the back surface of the sheet-like radio wave absorbing layer. Ri Na electrolessly deposited metal material, the surface resistance is 0.5
Thin wave absorber is characterized in that a Omega / □ or less der Ru radio wave reflecting layer.
れた有機保護膜をさらに備えたことを特徴とする請求項
１に記載の薄型電波吸収体。2. The thin electromagnetic wave absorber according to claim 1, further comprising an organic protective film applied on a front surface of said sheet-like electromagnetic wave absorbing layer.
あることを特徴とする請求項２に記載の薄型電波吸収
体。3. The thin electromagnetic wave absorber according to claim 2, wherein the organic protective film is an organic polymer film.
特徴とする請求項２に記載の薄型電波吸収体。4. The thin electromagnetic wave absorber according to claim 2, wherein the organic protective film is an organic coating film.
ことを特徴とする請求項１から４のいずれか１項に記載
の薄型電波吸収体。5. The thin radio wave absorber according to any one of claims 1 to 4 wherein the highly conductive metal material is characterized in that it comprises a nickel.
特徴とする請求項１から４のいずれか１項に記載の薄型
電波吸収体。6. A thin electromagnetic wave absorber according to any one of claims 1 to 4 wherein the highly conductive metal material is characterized by containing copper.
特徴とする請求項１から４のいずれか１項に記載の薄型
電波吸収体。7. A thin electromagnetic wave absorber according to any one of claims 1 to 4 wherein the highly conductive metal material is characterized by containing silver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04226546A JP3097343B2 (en) | 1992-08-04 | 1992-08-04 | Thin radio wave absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04226546A JP3097343B2 (en) | 1992-08-04 | 1992-08-04 | Thin radio wave absorber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0661679A JPH0661679A (en) | 1994-03-04 |
| JP3097343B2 true JP3097343B2 (en) | 2000-10-10 |
Family
ID=16846850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP04226546A Expired - Fee Related JP3097343B2 (en) | 1992-08-04 | 1992-08-04 | Thin radio wave absorber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3097343B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6869683B2 (en) | 2001-05-07 | 2005-03-22 | Shin-Etsu Chemical Co., Ltd. | Electromagnetic wave absorber |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11307974A (en) * | 1998-04-27 | 1999-11-05 | Sony Corp | Apparatus and method for electromagnetic shield |
| JP2006332260A (en) * | 2005-05-25 | 2006-12-07 | Hajime Murazaki | Material and structure for shielding electromagnetic wave |
| JP5597997B2 (en) * | 2009-12-14 | 2014-10-01 | 横浜ゴム株式会社 | Ball for ball game |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5947707A (en) * | 1982-09-13 | 1984-03-17 | Tdk Corp | Composite ferrite and preparation thereof |
| JPS59171397U (en) * | 1983-04-28 | 1984-11-16 | 株式会社 高瀬染工場 | Electromagnetic shielding material |
| JPH0783197B2 (en) * | 1983-09-08 | 1995-09-06 | ティーディーケイ株式会社 | Electromagnetic shield material |
| JPS61253373A (en) * | 1985-04-30 | 1986-11-11 | Chihiro Kogyo:Kk | Electromagnetic-wave shielding material and its manufacture |
| JPH01107598A (en) * | 1987-10-20 | 1989-04-25 | Nec Corp | Radiowave absorbing body |
| JPH03167893A (en) * | 1989-11-28 | 1991-07-19 | Yokohama Rubber Co Ltd:The | Electric wave-absorbing material |
| JPH04153034A (en) * | 1990-10-17 | 1992-05-26 | Kanai Hiroyuki | Electromagnetic wave shielding interior material |
| JP2648702B2 (en) * | 1991-01-16 | 1997-09-03 | 防衛庁技術研究本部長 | Manufacturing method of millimeter wave radio wave absorber |
-
1992
- 1992-08-04 JP JP04226546A patent/JP3097343B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6869683B2 (en) | 2001-05-07 | 2005-03-22 | Shin-Etsu Chemical Co., Ltd. | Electromagnetic wave absorber |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0661679A (en) | 1994-03-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0529776B1 (en) | Thermal control and electrostatic discharge laminate | |
| WO2005122665A2 (en) | Emi foil laminate gasket | |
| JPS61116405A (en) | Structure for dichroic antenna | |
| WO1998035542A1 (en) | Novel conductive loop pattern and frequency selective electromagnetic wave shielding material | |
| JP3097343B2 (en) | Thin radio wave absorber | |
| JP2003198179A (en) | Electromagnetic wave absorber | |
| US4044358A (en) | Self erectable structure | |
| JP3471617B2 (en) | Planar antenna device | |
| JP2002118008A (en) | Electromagnetic wave absorber for millimeter | |
| JP2003069284A (en) | Electromagnetic shielding wave material and manufacturing method therefor | |
| CN111410920A (en) | Wave-absorbing shielding adhesive film and preparation method thereof | |
| JPH1187980A (en) | Composite magnetic sheet | |
| KR200216783Y1 (en) | Intercepting device for electromagnetic waves | |
| JP2003289196A (en) | Resistive film for radio wave absorbent and its manufacturing method | |
| JP4031207B2 (en) | Plating sheet | |
| JP2001352191A (en) | Electromagnetic wave absorber | |
| CN210200952U (en) | Nanofiber antenna and antenna mounting structure | |
| CA2006192A1 (en) | Electromagnetic wave reflector for an antenna and its production method | |
| CN213803608U (en) | Concatenation type parcel bubble is cotton | |
| CN219938860U (en) | High light transmission electromagnetic shielding film | |
| JPH0392003A (en) | Radio wave reflection suppressing structure for travelling object | |
| JPH0632424B2 (en) | Electromagnetic wave shielding amorphous metal thin film laminated sheet | |
| CN207108904U (en) | A kind of conductive shield adhesive tape of ultrathin bendable | |
| JPS62260405A (en) | Electromagentic wave reflecting member | |
| JPH0870212A (en) | Mount structure for radio wave absorbing body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20000711 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080811 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080811 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090811 Year of fee payment: 9 |
|
| LAPS | Cancellation because of no payment of annual fees |