Research on low interference waveguide slot array antennas by frequency selective characteristics of radiation power

• Project/Area Number: 18K13754
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 21020:Communication and network engineering-related
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Takashi Tomura 東京工業大学, 工学院, 助教 (10803992)
• Project Period (FY): 2018-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000); Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: アンテナ / ミリ波 / 導波管 / 周波数選択 / 低干渉 / 導波管スロットアレーアンテナ / 放射量周波数選択

Outline of Final Research Achievements

Antenna design methodology and structure simplification were studied to realize high efficiency and high gain millimeter-wave band waveguide slot array antenna with frequency selective characteristics of radiation power. A unique design methodology which does not requires a numerical optimization is studied. Reflection characteristics agrees but gain does not agree well because conductivity may degrade greatly. Conductivity measurement methodology is established and measurement results showed that the narrow wall of the waveguide has much lower conductivity than wide wall one. For simple structure with high robustness on fabrication tolerance is studied and metal blocks are replaced by dielectric substrates. Addition of wide slot layer or double slit layers enables comparable characteristics with all metal antennas.

Academic Significance and Societal Importance of the Research Achievements

電波は有限な資源であり，効率良く使用することが求められる．通常，アンテナは使用する周波数帯の両側に不必要な電波を放射するため，隣接するシステム間に隙間を設けて周波数を設定する．この隙間は互いの不要な電波が混信し使用するのが不可能である．本研究課題の研究成果を用いることで，システムをより密に配置することが可能になり，電波の有効利用が可能になる．
本設計手法は最適化が不要な一意的設計法であり，効率的なアンテナ設計が可能になる．また設計したアンテナのコンポーネントごとの特性を知ることができ，ボトルネックとなっているコンポーネントを抽出することも可能である．

Research Products

• [Journal Article] Suppression of E-Plane Sidelobes Using a Double Slit Layer in a Corporate-Feed Waveguide Slot Array Antenna Consisting of 2x2-Element Radiating Units (2019)
  • Author(s): Arakawa Haruka、Irie Hisanori、Tomura Takashi、Hirokawa Jiro
  • Journal Title: IEEE Transactions on Antennas and Propagation Volume: 67 Issue: 6 Pages: 3743-3751
  • DOI: 10.1109/tap.2019.2902677
  • Peer Reviewed
• [Presentation] Analysis of 2×2 radiating slots with parallel-plate perpendicular-corporate feed based on method of moments (2019)
  • Author(s): S. Ji，T. Tomura, and J. Hirokawa
  • Organizer: Int. Symp. Antennas Propag. (ISAP)
  • Int'l Joint Research
• [Presentation] 導電率測定によるミリ波帯積層薄板導波管スロットアレーの利得評価 (2019)
  • Author(s): 戸村崇，広川二郎
  • Organizer: 信学ソ大, B-1-48
• [Presentation] 二種マルチモード直方体共振器による積層薄板導波管のミリ波帯異方性導電率測定 (2019)
  • Author(s): 戸村崇，広川二郎
  • Organizer: 信学技報， MW2019-20
• [Presentation] 2×2素子を放射単位とする並列給電導波管スロットアレーアンテナのサイドローブ抑圧 (2019)
  • Author(s): 広川二郎，荒川遥香，戸村崇
  • Organizer: 信学技報， AP2019-5
• [Presentation] 垂直方向並列給電4層平行平板45度偏波スロットアレーアンテナの設計 (2018)
  • Author(s): 入江寿憲，戸村崇，広川二郎
  • Organizer: 信学技報， AP2018-145， pp.1-4
• [Presentation] フィルタ設計理論による2×2素子導波管スロットアレーの給電構造広帯域設計 (2018)
  • Author(s): 戸村崇，広川二郎
  • Organizer: 信学ソ大， B-1-80
• [Presentation] フィルタ設計理論による2×2素子導波管スロットアレーの設計 (2018)
  • Author(s): 戸村崇，広川二郎
  • Organizer: 信学技報， AP2018-16， pp.17-21
• [Presentation] Design of feed structure for 2×2-element waveguide slot arrays by filter design theory (2018)
  • Author(s): T. Tomura and J. Hirokawa
  • Organizer: IEEE Int. Symp. Antennas Propag. (AP-S)， TU-UB.3P.4
  • Int'l Joint Research
• [Presentation] Design of feed and radiation elements for 2×2-element waveguide slot arrays by filter design theory (2018)
  • Author(s): T. Tomura and J. Hirokawa
  • Organizer: Int. Symp. Antennas Propag. (ISAP)， WeP-12
  • Int'l Joint Research