中国物理B ›› 2021, Vol. 30 ›› Issue (5): 58503-058503.doi: 10.1088/1674-1056/abd7e1

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Design of sextuple-mode triple-ring HTS UWB filter using two-round interpolation

Ming-En Tian(田明恩)1, Zhi-He Long(龙之河)2, You Lan(蓝友)1, Lei-Lei He(贺磊磊)1, and Tian-Liang Zhang(张天良)1,†   

  1. 1 School of Aeronautics and Astronautics, University of Electronic Science and Technology of China, Chengdu 611731, China;
    2 Department of Mechanical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR, China
  • 收稿日期:2020-08-24 修回日期:2020-11-30 接受日期:2021-01-04 出版日期:2021-05-14 发布日期:2021-05-14
  • 通讯作者: Tian-Liang Zhang E-mail:ztl@uestc.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61471094).

Design of sextuple-mode triple-ring HTS UWB filter using two-round interpolation

Ming-En Tian(田明恩)1, Zhi-He Long(龙之河)2, You Lan(蓝友)1, Lei-Lei He(贺磊磊)1, and Tian-Liang Zhang(张天良)1,†   

  1. 1 School of Aeronautics and Astronautics, University of Electronic Science and Technology of China, Chengdu 611731, China;
    2 Department of Mechanical Engineering, City University of Hong Kong, Kowloon, Hong Kong SAR, China
  • Received:2020-08-24 Revised:2020-11-30 Accepted:2021-01-04 Online:2021-05-14 Published:2021-05-14
  • Contact: Tian-Liang Zhang E-mail:ztl@uestc.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61471094).

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摘要： A single-stage ring resonator capable of introducing six modes within the ultra-wideband (UWB) passband is presented. The sextuple-mode resonator consists of three rings and three sets of stepped-impedance open stubs. Based on this sextuple-mode resonator, a UWB filter fed by the interdigital-coupling line (ICL) is designed. And we propose a two-round interpolation method to obtain the filter's initial dimensions. The designed filter is fabricated on a double-sided YBCO/MgO/YBCO high-temperature superconducting (HTS) thin film for demonstration. The experimental results show that this UWB filter produces eight resonances in the passband eventually, which effectively improves the in-band reflection and the band-edge steepness. Moreover, the upper stopband performance is enhanced due to the transmission zeros (TZs) generated by the stepped-impedance open stubs and the ICL structure. The measured good performance verifies the practicability of the two-round interpolation approach, which can also be extended to other odd-even-mode filter designs.

关键词: HTS filter, ring resonator, sextuple-mode, two-round interpolation, ultra-wideband (UWB)

Abstract: A single-stage ring resonator capable of introducing six modes within the ultra-wideband (UWB) passband is presented. The sextuple-mode resonator consists of three rings and three sets of stepped-impedance open stubs. Based on this sextuple-mode resonator, a UWB filter fed by the interdigital-coupling line (ICL) is designed. And we propose a two-round interpolation method to obtain the filter's initial dimensions. The designed filter is fabricated on a double-sided YBCO/MgO/YBCO high-temperature superconducting (HTS) thin film for demonstration. The experimental results show that this UWB filter produces eight resonances in the passband eventually, which effectively improves the in-band reflection and the band-edge steepness. Moreover, the upper stopband performance is enhanced due to the transmission zeros (TZs) generated by the stepped-impedance open stubs and the ICL structure. The measured good performance verifies the practicability of the two-round interpolation approach, which can also be extended to other odd-even-mode filter designs.

Key words: HTS filter, ring resonator, sextuple-mode, two-round interpolation, ultra-wideband (UWB)

中图分类号:  (Superconducting devices)

  • 85.25.-j