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Study of super broad-band electromagnetic wave absorber with thin structure

Research Project

Project/Area Number 06555101
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section試験
Research Field 電子デバイス・機器工学
Research InstitutionTokyo Institute of Technology

Principal Investigator

NAITO Yoshiyuki  Tokyo Institute of Technology, Department of Physical Electronics, Professor, 工学部, 教授 (70016335)

Co-Investigator(Kenkyū-buntansha) YOKOI Hideki  Tokyo Institute of Technology, Department of Physical Electronics, Research Asso, 工学部, 助手 (90251636)
ANZAI Hiroki  Tokyo Institute of Technology, Department of Physical Electronics, Research Asso, 工学部, 助手 (80212661)
MIZUMOTO Tetsuya  Tokyo Institute of Technology, Department of Physical Electronics, Associate Pro, 工学部, 助教授 (00174045)
Project Period (FY) 1994 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥19,300,000 (Direct Cost: ¥19,300,000)
Fiscal Year 1996: ¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1995: ¥5,900,000 (Direct Cost: ¥5,900,000)
Fiscal Year 1994: ¥11,200,000 (Direct Cost: ¥11,200,000)
Keywordsnoise emission / electromagnetic wave absorber / anechoic chamber / return loss / ferrite / rubber ferrite / site attenuation / フェライト格子吸収体 / 電磁波
Research Abstract

Electromagnetic wave absorbers lined in anechoic chambers are investigated. The purposes of this study are to broaden a bandwidth of N-type absorber which provides return loss > 20dB at frequencies higher than 30MHz, to make a thin W-type absorber which provides return loss > 20dB at any frequency higher than 30MHz, and to exploit the site attenuation characteristic of anechoic chamber lined with the absorber for designing the chamber with desired characteristics. The results obtained are summarized in the following.
1. A novel broad-band N-type absorber which exhibits return loss > 20dB in the ferquency range of 30MHz-1700MHz is developed. The absorber is constructed with a ferrite grid and a rubber ferrite plate. Also, it is found that the degradation of return loss characteristics brought about by gaps between absorber units is much less in the ferrits grid absorber compared with others.
2. W-type absorbers of 500mm thickness are realized by attaching lossy dielectric to broad-band N-type absorbers. Sufficient return loss characteristics are successfully demonstrated. Its thickness is less than a half compared with conventional absorbers. Also, the analytical technique which gives accurate results even for angled incidence is developed to calculate return loss characteristics of pyramidal absorbers.
3. Numerical calculation based on a ray-tracing technique is developed to exploit the site attenuation characteristics. It reveals the required return loss of absorber to construct anechoic chambers with desired site attenuation characteristic.

Report

(4 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • 1994 Annual Research Report
  • Research Products

    (52 results)

All Other

All Publications (52 results)

  • [Publications] 内藤喜之、他: "超広帯域電波吸収体の設計とその特性" 電子情報通信学会論文誌. J77-BII. 557-563 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Naito,et al.: "Anechoic chamber having multi-layer electromagnetic wave absorbers of sintered ferrite and ferrite composite membrane" IEEE Int. Symposium on EMC Technical Digest. 402-407 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Naito,et al.: "Anechoic chamber fitted with ferrite grid or ferrite multi-layer electromagnetic wave absorbers" Int. Symposium on EMC'94 Rome Technical Digest. 229-234 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 安斎弘樹、他: "ピラミッド形電波吸収体の斜入射特性の検討" 電子情報通信学会技術研究報告. EMCJ94-27. 9-16 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 安斎弘樹、他: "ゴムフェライト装荷フェライト系電波吸収体を用いた電波半無饗室のゾンマーフェルト積分式による解析の検討" 電子情報通信学会技術研究報告. EMCJ94-60. 71-78 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 安斎弘樹、他: "ピラミッド形電波吸収体の特性解析:近似モデルとTE波への適用" 電子情報通信学会論文誌. J78-B-II. 191-199 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Anzai,et al.: "Effect of the ferrite tiles' gap on ferrite electromagnetic wave absorber" IEEE Int. Symposium on EMC Technical Digest. 297-302 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Anzai,et al.: "The equivalent representation of pyramidal absorbers and its application to the analysis of electromagnetic wave absorber's characteristics" IEEE Int. Symposium on EMC Technical Digest. 563-567 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 安斎弘樹、他: "フェライト系電波吸収体に対する隙間の影響" 電子情報通信学会技術研究報告. EMCJ95-38. 1-6 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 岸本武士、他: "レイトレーシングシミュレーションによる電波半無饗室の正規化サイトアッテネーション" 1995年電子情報通信学会春季大会. B-289 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 安斎弘樹、他: "TM偏波に対するピラミッド形電波吸収体の特性測定" 1995年電子情報通信学会春季大会. B-315 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 安斎、他: "ピラミッド形吸収体の斜入射特性とその等価回路近似モデルについて" 電子情報通信学会論文誌. Vol.J79B-II No.10. 686-693 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 安斎、他: "フェライト系電波吸収体に対する隙間の影響" 電子情報通信学会論文誌. (掲載予定). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Anzai,et al.: "Analysis of semi-anechoic chamber using ray-tracing technique" 1996 IEEE International Symposium on Electromagnetic Compatibility,Technical Digest. 143-145 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Naito,et al.: "Criteria for absorber's reflectivity lined in semi-anechoic chambers using raytracing technique" 1996 IEEE International Symposium on Electromagnetic Compatibility,Technical Digest. 140-142 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 安斎、他: "一層構造形電波吸収体を適用した電波半無饗室の特性" 1996年電子情報通信学会秋季大会講演論文集. B297 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 安斎、他: "VHF周波数帯における桟形フェライト電波吸収体ユニット間の隙間" 1996年電子情報通信学会秋季大会講演論文集. B288 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Naito, et al: "Design of super wide-band electromagnetic wave absorber and its characteristics" Transactions of IEICE. vol.J77-B-II. 557-563 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Naito, et al: "Anechoic chamber having multi-layr electromagnetic wave absorbers of sintered ferrite and ferrite composite membrane" IEEE Int.Symposium on EMC Technical Digest. 402-407 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Naito, et al: "Anechoic chamber fitted with ferrits grid or ferrite multi-layr electromagnetic wave absorbers" IEEE Int.Symposium on EMC Technical Digest.402-407 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Anzai, et al.: "Analysis of pyramid electromagnetic wave absorber" Technical Report of IEICE,EMCJ94-27. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Anzai, et al.: "An analysis of the semi-anechoic chambers with errite EM wave absorbers by attaching robber ferrite by using Sommerfeld-type integrals" Technical Report o IEICE,EMCJ94-60. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Anzai, et al.: "Analysis of the pyramid electro-magnetic wave absorber --- an approximated model and its application of TE wave" Transactions of IEICE. vol.J78-B-II. 191-199 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Anzai, et al.: "Effect of the ferrite tiles' gap on ferrite electromagnetic wave absorber" IEEE Int.Symposium on EMC Technical Digest. 297-302 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Anzai, et al.: "The equivalent represntation of pyramidal absorbers and its applicatoin to the analysis of electromagnetic wave absorber's characteristics" IEEE Int.Symposium on EMC Technical Digest. 563-567 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Anzai, et al.: "Effect of the ferrite tiles' gap on ferrite electromagnetic wave absorber" Technical Report of IEICE,EMCJ95-38. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] T.Kishimoto, et al: "Normalized site attenuation of semi-anechoic chambers simulated by the ray-tracing technique" Proc.1995 IEICE General Conference, B-289. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Anzai, et al.: "Measurement of pyramidal electromagnetic wave absorber for TM wave" Proc.1995 IEICE General Conference, B-315. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Anzai, et al.: "Characteristics of pyramidal electromagnetic wave absorber for oblique incidence and its equivalent representation used by the approximate method" Transactions of IEICE. vol.J79-B-II. 686-693 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Anzai, et al.: "Effect of the ferrite tiles' gap on ferrite electromagnetic wave absorber" Transactions of IEICE. (to be published). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Anzai, et al.: "Analysis of semi-anechoic chamber using ray-tracing technique" IEEE Int.Symposium on EMC Technical Digest. 143-145 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] "Criteria for absorber's reflectivity lined in semi-anechoic chambers using ray-tracing technique" IEEE Int.Symposium on EMC Technical Digest. 140-142 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Anzai, et al.: "Characteristic of semi-anechoic chambers applied a single-layred absorber" Proc.1996 IEICE General Conference, B-297. (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Anzai, et al.: "Effect of gaps between fin ferrite electromagnetic wave absorbers on VHF-band" Proc.1996 IEICE General Conference, B-288. (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 安斎、他: "ピラミッド形吸収体の斜入射特性とその等価回路近似モデルについて" 電子情報通信学会論文誌. vol.J79B-II No.10. 686-693 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 安斎、他: "フェライト系電波吸収体に対する隙間の影響" 電子情報通信学会論文誌. (掲載予定). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] H.Anzai,et al.: "Analysis of semi-anechoic chamber using ray-tracing technique" 1996 IEEE International Symposium on Electromagnetic Compatibility,Technical Digest. 143-145 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Y.Naito,et al.: "Criteria for absorber′s reflectivity lined in semi-anechoic chambers using ray-tracing technique" 1996 IEEE International Symposium on Electromagnetic Compatibility,Technical Digest. 140-142 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 安斎、他: "一層構造形電波吸収体を適用した電波半無響室の特性" 1996年電子情報通信学会秋季大会講演論文集. B297- (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 安斎、他: "VHF周波数帯における桟形フェライト電波吸収体ユニット間の隙間" 1996年電子情報通信学会秋季大会講演論文集. B288- (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 安斎弘樹、他: "ピラミッド形電波吸収体の特性解析:近似モデルとTE波への適用" 電子情報通信学会論文誌. J78-B-II. 191-199 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] H.Anzai,et al.: "Effect of the ferrite tiles' gap on ferrite electromagnetic wave absorber" IEEE Int.Symposium on EMC Technical Digest. 297-302 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] H.Anzai,et al.: "The equivalent representation of pyramidal absorbers and its application to the analysis of electromagnetic wave absorber's characteristics" IEEE Int.Symposium on EMC Technical Digest. 563-567 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 安斎弘樹,他: "フェライト系電波吸収体に対する隙間影響" 電子情報通信学会技術研究報告. EMCJ 95-38. 1-6 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 岸本武士、他: "レイトレーシングシミュレーションによる電波半無響室の正規化サイトアッテネーション" 1995年電子情報通信学会春季大会. B-289 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 安斎弘樹,他: "TM偏波に対するピラミッド形電波吸収体の特性測定" 1995年電子情報通信学会春季大会. B-315 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 内藤喜之、他: "超広帯域電波吸収体の設計とその特性" 電子情報通信学会論文誌. J77-BII. 557-563 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 安斎弘樹、他: "ピラミッド形電波吸収体の特性解析-近似モデルとTE波への適用-" 電子情報通信学会論文誌. J78-BII(掲載予定). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] Y.Naito,et al.: "Anechoic chamber having multi-layer electromagnetic wave absorbers of sintered ferrite and ferrite composite membrane" IEEE Int.Symposium on EMC Technical Digest. 402-407 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Y.Naito,et al.: "Anechoic chamber fitted with ferrite grid or ferrite multi-layer electromagnetic wave absorbers" Int.Symposium on EMC'94 Rome Technical Digest. 229-234 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 安斎弘樹、他: "ピラミッド形電波吸収体の斜入射特性の検討" 電子情報通信学会技術研究報告. EMCJ94-27. 9-16 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 安斎弘樹、他: "ゴムフェライト装荷フェライト系電波吸収体を用いた電波半無響室のゾンマーフェルト積分式による解析の検討"" 電子情報通信学会技術研究報告. EMCJ94-60. 71-78 (1994)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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