JP4144754B2 - 電波吸収体 - Google Patents
電波吸収体 Download PDFInfo
- Publication number
- JP4144754B2 JP4144754B2 JP2004161112A JP2004161112A JP4144754B2 JP 4144754 B2 JP4144754 B2 JP 4144754B2 JP 2004161112 A JP2004161112 A JP 2004161112A JP 2004161112 A JP2004161112 A JP 2004161112A JP 4144754 B2 JP4144754 B2 JP 4144754B2
- Authority
- JP
- Japan
- Prior art keywords
- radio wave
- wave absorber
- conductive material
- absorber
- tip
- 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 - Lifetime
Links
- 239000006096 absorbing agent Substances 0.000 title claims description 140
- 239000004020 conductor Substances 0.000 claims description 61
- 239000000463 material Substances 0.000 claims description 61
- 229910000859 α-Fe Inorganic materials 0.000 claims description 18
- 230000002745 absorbent Effects 0.000 claims description 6
- 239000002250 absorbent Substances 0.000 claims description 6
- 239000011358 absorbing material Substances 0.000 claims 2
- 238000010521 absorption reaction Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 230000010287 polarization Effects 0.000 description 7
- 239000002131 composite material Substances 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 5
- 239000010439 graphite Substances 0.000 description 5
- 229920006248 expandable polystyrene Polymers 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000012779 reinforcing material Substances 0.000 description 2
- 229910017518 Cu Zn Inorganic materials 0.000 description 1
- 229910017752 Cu-Zn Inorganic materials 0.000 description 1
- 229910017943 Cu—Zn Inorganic materials 0.000 description 1
- 239000004794 expanded polystyrene Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
- H01Q17/008—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems with a particular shape
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Aerials With Secondary Devices (AREA)
Description
前記導電材料を含む電波吸収材は複数の板から構成され、内部が中空の角錐の先端に、前記中空の部分の開口を30〜100MHzの低周波特性改善のために設けた形状であり、前記導電材料を含む電波吸収材は、底端巾に対する前記先端巾の比が1/6〜5/6で
、前記先端巾が500mm以下であり、先端部にギザギザ形状を有することを特徴としている。
2 誘電損失材料
10,20 電波吸収材
21 開口
22 ギザギザ形状
23 嵌合凸部
30 底部吸収材
31 先細形状部分
32 嵌合凹部
40,50 電波吸収材分割体
60 中間補強材
70 表面材
Claims (10)
- 磁性損失材料からなる電波吸収材と、その前面に配置された導電材料を含む電波吸収材とを有し、
前記導電材料を含む電波吸収材は複数の板から構成され、内部が中空の角錐の先端に、前記中空の部分の開口を30〜100MHzの低周波特性改善のために設けた形状であり、前記導電材料を含む電波吸収材は、底端巾に対する前記先端巾の比が1/6〜5/6で、前記先端巾が500mm以下であり、先端部にギザギザ形状を有することを特徴とする電波吸収体。 - 前記導電材料を含む電波吸収材は、長さが0.5m〜3mである請求項1記載の電波吸収体。
- 前記導電材料を含む電波吸収材は、複数の電波吸収材分割体を長手方向に継ぎ足して構成されることを特徴とする請求項1又は2記載の電波吸収体。
- 前記導電材料を含む電波吸収材は、導電材料を内部に含む構成であることを特徴とする請求項1,2又は3記載の電波吸収体。
- 前記導電材料を含む電波吸収材は、導電材料を含有する導電層を表面に備える構成であることを特徴とする請求項1,2,3又は4記載の電波吸収体。
- 前記磁性損失材料からなる電波吸収材と、前記導電材料を含む電波吸収材の間に底部吸収材を配置したことを特徴とする請求項1,2,3,4又は5記載の電波吸収体。
- 前記底部吸収材は、導電材料を含むことを特徴とする請求項6記載の電波吸収体。
- 前記底部吸収材は、先細形状部分を有し、該先細形状部分が前記導電材料を含む電波吸収材の中空部分に位置することを特徴とする請求項6又は7記載の電波吸収体。
- 前記底部吸収材は、前記導電材料を含む電波吸収材を支持する形状を有することを特徴とする請求項6,7又は8記載の電波吸収体。
- 前記磁性損失材料は、フェライト焼結体であることを特徴とする請求項1,2,3,4,5,6,7,8又は9記載の電波吸収体。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004161112A JP4144754B2 (ja) | 2004-05-31 | 2004-05-31 | 電波吸収体 |
US11/128,338 US7471233B2 (en) | 2004-05-31 | 2005-05-13 | Electromagnetic wave absorber |
EP05011490A EP1603192B1 (en) | 2004-05-31 | 2005-05-27 | Electromagnetic wave absorber |
DE602005008668T DE602005008668D1 (de) | 2004-05-31 | 2005-05-27 | Absorber für elektromagnetische Strahlung |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004161112A JP4144754B2 (ja) | 2004-05-31 | 2004-05-31 | 電波吸収体 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005340730A JP2005340730A (ja) | 2005-12-08 |
JP4144754B2 true JP4144754B2 (ja) | 2008-09-03 |
Family
ID=34937000
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004161112A Expired - Lifetime JP4144754B2 (ja) | 2004-05-31 | 2004-05-31 | 電波吸収体 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7471233B2 (ja) |
EP (1) | EP1603192B1 (ja) |
JP (1) | JP4144754B2 (ja) |
DE (1) | DE602005008668D1 (ja) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7688246B2 (en) * | 2005-05-10 | 2010-03-30 | Fuji Xerox Co., Ltd. | Radio wave absorber, electromagnetic field measurement system and radiated immunity system |
US7479917B2 (en) | 2005-08-05 | 2009-01-20 | Tdk Corporation | Electromagnetic wave absorber, manufacturing method thereof and electromagnetic wave anechoic room |
US7750859B2 (en) | 2006-01-12 | 2010-07-06 | Lockheed Martin Corporation | Generic pick-up horn for high power thermal vacuum testing of satellite payloads at multiple frequency bands and at multiple polarizations |
US7598919B2 (en) * | 2006-01-12 | 2009-10-06 | Lockheed Martin Corporation | Pick-up horn for high power thermal vacuum testing of spacecraft payloads |
US7940203B2 (en) * | 2006-05-02 | 2011-05-10 | Central Glass Company, Limited | Electromagnetic wave absorption board to be used in wireless LAN |
EP2064778A1 (en) * | 2006-09-22 | 2009-06-03 | BAE Systems plc | Structure |
FI121980B (fi) * | 2007-02-16 | 2011-06-30 | Voyantic Oy | Menetelmä radiolinkin karakterisoimiseksi |
JP5165996B2 (ja) * | 2007-11-08 | 2013-03-21 | 株式会社リケン | 電波暗室用電波吸収体 |
CN102625647A (zh) * | 2012-03-26 | 2012-08-01 | 扬州市职业大学 | 碳长丝束毛圈与伸直排列复合的吸波屏蔽片、加工工艺及其用途 |
DE102012015578B4 (de) * | 2012-08-08 | 2016-05-19 | Astrium Gmbh | Hohlleiterabschlusseinrichtung |
US9912060B2 (en) * | 2015-01-09 | 2018-03-06 | The United States Of America As Represented By The Secretary Of The Army | Low-profile, tapered-cavity broadband antennas |
US9865925B2 (en) * | 2015-01-09 | 2018-01-09 | The United States Of America As Represented By The Secretary Of The Army | Low-profile cavity broadband antennas having an anisotropic transverse resonance condition |
CN106781370B (zh) * | 2016-12-05 | 2021-03-26 | 西安科技大学 | 基于无线通信传播特性井下救援机器人通讯节点布放方法 |
CN113131223B (zh) * | 2021-04-02 | 2022-04-08 | 北京理工大学 | 一种双极化双吸收带的电磁波吸收器 |
US20230038708A1 (en) * | 2021-08-05 | 2023-02-09 | Rohde & Schwarz Gmbh & Co. Kg | Absorber device and test system |
CN114641200B (zh) * | 2022-04-02 | 2023-05-05 | 四川农业大学 | 一种氮掺杂微波吸收材料及其制备方法 |
Family Cites Families (45)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2985880A (en) * | 1958-04-24 | 1961-05-23 | Edward B Mcmillan | Dielectric bodies for transmission of electromagnetic waves |
US3526896A (en) * | 1961-02-02 | 1970-09-01 | Ludwig Wesch | Resonance absorber for electromagnetic waves |
US3348224A (en) * | 1964-01-20 | 1967-10-17 | Mcmillan Corp Of North Carolin | Electromagnetic-energy absorber and room lined therewith |
FR1516863A (fr) * | 1966-12-22 | 1968-03-15 | Le Panneau Magnetique L P M | Panneau d'insonorisation, notamment pour revêtement du plafond et des murs d'un local |
US3631492A (en) * | 1968-10-09 | 1971-12-28 | Kunihiro Suetake | Multilayer wave absorbing wall |
US4050073A (en) * | 1976-01-14 | 1977-09-20 | Ludwig Wesch | Support for foam absorber of electromagnetic waves |
US4118704A (en) * | 1976-04-07 | 1978-10-03 | Tdk Electronics Co., Ltd. | Electromagnetic wave-absorbing wall |
US4164718A (en) * | 1976-07-09 | 1979-08-14 | California Institute Of Technology | Electromagnetic power absorber |
FR2400781A1 (fr) * | 1977-06-24 | 1979-03-16 | Radant Etudes | Antenne hyperfrequence, plate, non dispersive, a balayage electronique |
JPS6245100A (ja) | 1985-08-21 | 1987-02-27 | 日本電気株式会社 | 電波吸収体 |
JPH0230875Y2 (ja) | 1986-02-17 | 1990-08-20 | ||
EP0323826B1 (en) * | 1988-01-05 | 1997-10-15 | Nec Corporation | Electromagnetic wave absorber |
JPH02161799A (ja) | 1988-12-14 | 1990-06-21 | Toppan Printing Co Ltd | 電磁波吸収体素子 |
JPH03204999A (ja) | 1990-01-05 | 1991-09-06 | Yokohama Rubber Co Ltd:The | 電波吸収体 |
JPH0444300A (ja) | 1990-06-12 | 1992-02-14 | W R Grace & Co | 電波吸収体 |
US5331567A (en) * | 1991-08-22 | 1994-07-19 | The University Of Colorado Foundation, Inc. | Pyramidal absorber having multiple backing layers providing improved low frequency response |
US5208599A (en) * | 1991-08-28 | 1993-05-04 | Ohio State University | Serrated electromagnetic absorber |
US5373296A (en) * | 1992-08-18 | 1994-12-13 | Tdk Corporation | Electromagnetic wave absorber and wave absorption structure |
JP3035110B2 (ja) | 1993-03-22 | 2000-04-17 | ティーディーケイ株式会社 | 電波吸収構造体 |
JP2660647B2 (ja) | 1992-10-21 | 1997-10-08 | 株式会社巴川製紙所 | 電波吸収体 |
US5492749A (en) * | 1993-09-21 | 1996-02-20 | International Business Machines Corporation | Absorber with optimized low frequency reflection |
JPH07193388A (ja) | 1993-12-27 | 1995-07-28 | Tdk Corp | マイクロ波・ミリ波用電波吸収体 |
JP3319147B2 (ja) * | 1994-04-15 | 2002-08-26 | ティーディーケイ株式会社 | 電波吸収体 |
JP3394848B2 (ja) | 1994-06-23 | 2003-04-07 | 株式会社竹中工務店 | 電波吸収体用部材、電波吸収体および電波吸収体用部材の製造方法 |
US5892188A (en) * | 1996-07-24 | 1999-04-06 | Kabushiki Kaisha Riken | Porous ferrite wave absorber |
JPH10224078A (ja) | 1997-02-06 | 1998-08-21 | Riken Corp | 電波吸収体 |
JPH10217217A (ja) | 1997-02-07 | 1998-08-18 | Mitsubishi Chem Corp | 錐状電波吸収体の製造法 |
US5844518A (en) * | 1997-02-13 | 1998-12-01 | Mcdonnell Douglas Helicopter Corp. | Thermoplastic syntactic foam waffle absorber |
JP4004096B2 (ja) | 1997-03-28 | 2007-11-07 | 株式会社リケン | 電波吸収体 |
AU8583598A (en) * | 1997-07-23 | 1999-02-16 | Cuming Microwave Corporation | Radar absorber and method of manufacture |
WO1999041961A1 (fr) * | 1998-02-10 | 1999-08-19 | Otsuka Chemical Co., Ltd. | Procede de fixation d'un absorbeur d'ondes radioelectriques et structure de fixation |
JP2000077883A (ja) * | 1998-08-28 | 2000-03-14 | Tdk Corp | 不燃性ハニカム電波吸収材およびこれを用いた電波吸収体 |
EP0986294A3 (en) * | 1998-09-04 | 2000-05-17 | TDK Corporation | Electric wave absorber |
JP2000082893A (ja) | 1998-09-04 | 2000-03-21 | Tdk Corp | 電波吸収体 |
JP3041295B1 (ja) * | 1998-10-15 | 2000-05-15 | 株式会社リケン | 複合電波吸収体およびその施工方法 |
JP2000277972A (ja) | 1999-01-18 | 2000-10-06 | Ten Kk | 広帯域用電磁波吸収体 |
JP4377467B2 (ja) * | 1999-01-21 | 2009-12-02 | Tdk株式会社 | 電波吸収体組立用部材およびそれを用いた電波吸収体 |
JP2001127483A (ja) * | 1999-10-28 | 2001-05-11 | Riken Corp | 電波吸収体 |
JP2001244686A (ja) | 2000-03-02 | 2001-09-07 | Tdk Corp | 電波吸収体、電波暗箱、電波暗室、電波吸収パネルおよび電波吸収衝立 |
JP2001274588A (ja) * | 2000-03-27 | 2001-10-05 | Tdk Corp | 電波吸収体 |
JP2002009482A (ja) | 2000-06-26 | 2002-01-11 | Riken Corp | 電波吸収体 |
DE10039125A1 (de) * | 2000-08-10 | 2002-02-21 | Colfirmit Rajasil Gmbh & Co Kg | Elektromagnetisches Absorbermaterial, Verfahren zu dessen Herstellung und dessen Verwendung |
US6738008B1 (en) * | 2000-12-21 | 2004-05-18 | Ets-Lindgren L.P. | Matching network hybrid electro-magnetic compatibility absorber |
JP2003229691A (ja) * | 2002-01-31 | 2003-08-15 | Riken Corp | 電波吸収体 |
FR2837508B1 (fr) * | 2002-03-19 | 2005-06-24 | Ecole Polytech | Mur antibruit |
-
2004
- 2004-05-31 JP JP2004161112A patent/JP4144754B2/ja not_active Expired - Lifetime
-
2005
- 2005-05-13 US US11/128,338 patent/US7471233B2/en active Active
- 2005-05-27 EP EP05011490A patent/EP1603192B1/en not_active Expired - Fee Related
- 2005-05-27 DE DE602005008668T patent/DE602005008668D1/de active Active
Also Published As
Publication number | Publication date |
---|---|
EP1603192B1 (en) | 2008-08-06 |
US7471233B2 (en) | 2008-12-30 |
JP2005340730A (ja) | 2005-12-08 |
US20060066467A1 (en) | 2006-03-30 |
DE602005008668D1 (de) | 2008-09-18 |
EP1603192A1 (en) | 2005-12-07 |
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