Improvements of microwave antenna with magnetic-dielectric nano composite materials

• Project/Area Number: 26889006
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Electronic materials/Electric materials
• Research Institution: Tohoku University
• Principal Investigator: Aoki Hanae 東北大学, 学際科学フロンティア研究所, 助教 (60733920)
• Project Period (FY): 2014-08-29 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000); Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 小型アンテナ / 近傍界 / ナノ複相膜 / タンデムスパッタ法 / マイクロ波アンテナ / 磁性-誘電ナノ複相膜 / 高周波軟磁気特性

Outline of Final Research Achievements

The aim of this study is to achieve miniaturization and high performance antenna by using magnetic-dielectric nano-composite materials. Small spiral antenna with SiO2 dielectric layers were fabricated. It is noteworthy that the size of antenna is 4×4 mm, less than o.o3λat 2-4 GHz frequencies. To evaluate wideband transmission properties from 0.1-40 GHz, a couple of antenna was faced each other with 30 mm distance and fed by 50 Ω matched wafer probes. High return loss of -10 dB was found at recent wireless communication frequencies of 2-4 GHz.

Research Products

• [Int'l Joint Research] NCSR"DEMOKRITOS"(Greece)
• [Journal Article] High noise suppression using magnetically isotropic (CoFe-AlN)/(AlN) multilayer films (2015)
  • Author(s): H. Kijima, S. Ohnuma, H. Masumoto, Y. Shimada, Y. Endo, and M. Yamaguchi
  • Journal Title: Journal of Applied Physics Volume: 117 Issue: 17 Pages: 1096-1103
  • DOI: 10.1063/1.4917500
  • Peer Reviewed / Open Access
• [Presentation] 超小型スパイラルアンテナの放射特性の実験的評価 (2016)
  • Author(s): 青木英恵、増本博、荒井賢一、山口正洋
  • Organizer: 電子情報通信学会総合大会
  • Place of Presentation: 九州大学
  • Year and Date: 2016-03-15
• [Presentation] Radiated Noise Suppression Effects of Multilayered Soft Magnetic (Co-AlN)/(AlN) Films (2015)
  • Author(s): Hanae Aoki, Ma Jingyan, Hiroshi Masumoto and Masahiro Yamaguchi
  • Organizer: Korea-Japan EMT/EMC/BE Joint Conference (KJJC 2015)
  • Place of Presentation: Sendai
  • Year and Date: 2015-11-23
  • Int'l Joint Research
• [Presentation] 誘電層を挿入した不平衡給電スパイラルアンテナの小型化・高周波化の検討 (2015)
  • Author(s): 青木英恵、増本博、早坂淳一、荒井賢一、山口正洋
  • Organizer: 第39回日本磁気学会学術講演会
  • Place of Presentation: 名古屋大学
  • Year and Date: 2015-09-08
• [Presentation] 低損失磁気-誘電Co-AlN-SiO2ナノグラニュラー膜の作製 (2015)
  • Author(s): 青木英恵、増本博、大沼繁弘、山口正洋
  • Organizer: 第39回日本磁気学会学術講演会
  • Place of Presentation: 名古屋大学
  • Year and Date: 2015-09-08
• [Presentation] High Noise Suppression Effects of Magnetically Isotropic (CoFe-AlN)/(AlN) Multilayer Films (2014)
  • Author(s): H. Kijima, S. Ohnuma, H. Masumoto,Y. Shimada, Y. Endo and M. Yamaguchi,
  • Organizer: 59th Annual Magnetism and Magnetic Materials (MMM) Conference
  • Place of Presentation: Honolulu(Hawaii)
  • Year and Date: 2014-11-04 – 2014-11-07
• [Presentation] Multilayered Co alloy nitride granular films for high frequency electromagnetic application (2014)
  • Author(s): H. Kijima and H. Masumoto
  • Organizer: Energy Materials Nanotechnology (EMN) Open Access Week
  • Place of Presentation: Chengdu(China)
  • Year and Date: 2014-09-22 – 2014-09-25
  • Invited
• [Presentation] 面内等方性を有するCo-AlN膜の高ノイズ抑制効果 (2014)
  • Author(s): 木嶌英恵、大沼繁弘、島田 寛、増本 博、遠藤 恭、山口正洋
  • Organizer: 第38回日本磁気学会学術講演会
  • Place of Presentation: 慶応義塾大(東京)
  • Year and Date: 2014-09-02 – 2014-09-05
• [Remarks] 東北大学 研究者紹介 木嶌英恵
  • URL: http://db.tohoku.ac.jp/whois/detail/aa7060d43fd9807ad9b906f53ccb34cc.html