Development of high performance tri-band bandpass filter for next generation cellular base station

• Project/Area Number: 26820126
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Electron device/Electronic equipment
• Research Institution: University of Yamanashi
• Principal Investigator: SEKIYA Naoto 山梨大学, 総合研究部, 助教 (80432160)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000); Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: マイクロ波フィルタ / 超伝導 / 超伝導フィルタ / 帯域通過フィルタ / トリバンド帯域通過フィルタ / デュアルバンド帯域通過フィルタ

Outline of Final Research Achievements

A high-temperature superconducting (HTS) tri-band bandpass filter (TBPF) is developed for next generation cellular base station. The TBPF constructed with dual-band bandpass filter with stub-loaded meander-line resonators and single-band bandpass filter with step-impedance resonators . The center frequencies are 3.5 GHz, 4.25 GHz and 5.0 GHz. We designed and analyzed a 4-pole and 7-pole HTS TBPF. The 4-pole TBPF was fabricated using YBa2Cu3O7 thin film on r-Al2O3 substrate. The measured frequency responses of the filter match well with the simulation one.

Research Products

• [Journal Article] Design of Tri-Band Superconducting Bandpass Filters with Independently Controllable Bandwidths (2015)
  • Author(s): N. Sekiya, S. Sugiyama
  • Journal Title: Superconductive Electronics Conference (ISEC), 2015 15th International Volume: 1 Pages: 1-3
  • DOI: 10.1109/isec.2015.7383448
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Design of Miniaturized HTS Dual-band Bandpass Filters Using Stub-loaded Meander Line Resonators and Their Applications To Tri-band Band-pass Filters (2015)
  • Author(s): N. Sekiya
  • Journal Title: IEEE Transactions on Applied Superconductivity Volume: 25 Issue: 3 Pages: 1500805-1500805
  • DOI: 10.1109/tasc.2014.2362352
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] スタブ装荷メアンダライン共振器を用いた超伝導トリバンド帯域通過フィルタの設計 (2016)
  • Author(s): 海野雄丈，關谷尚人
  • Organizer: マイクロ波研究会
  • Place of Presentation: 東京都港区芝公園 機械振興会館
  • Year and Date: 2016-04-20
• [Presentation] Design of Tri-Band Superconducting Bandpass Filters with Sharp-Cutoff (2015)
  • Author(s): N. Sekiya
  • Organizer: 28th International Symposium on Superconductivity
  • Place of Presentation: 東京都船堀 タワーホール船堀
  • Year and Date: 2015-11-16
  • Int'l Joint Research
• [Presentation] Design of Tri-band Superconducting Bandpass Filters with Independently Controllable bandwidths (2015)
  • Author(s): N. Sekiya
  • Organizer: 15th International Superconductive Electronics Conference
  • Place of Presentation: 名古屋大学（愛知県・名古屋市）
  • Year and Date: 2015-07-06 – 2015-07-09
• [Presentation] Design of tri-band superconducting bandpass filters with independently controllable bandwidths (2015)
  • Author(s): N. Sekiya, S. Sugiyama
  • Organizer: 15th International Superconductive Electronics Conference
  • Place of Presentation: 愛知県名古屋市 名古屋大学
  • Year and Date: 2015-07-06
  • Int'l Joint Research
• [Remarks] 關谷研究室
  • URL: http://www.ccn.yamanashi.ac.jp/~nsekiya/index.html
• [Remarks] 山梨大学研究者総覧
  • URL: http://erdb.yamanashi.ac.jp/rdb/A_DispInfo.Scholar?ID=3ED79D6805215830