Developments of ultra-narrowband high temperature superconducting bandpass filters

Chun Guang Li, Tao Yu, Yong Bo Bian, Jia Wang, Yun Wu, Xu Wang, Guo Qiang Li, Xue Qiang Zhang, Liang Sun, Hong Li, Yu Sheng He

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper presents the design and fabrication of an ultra-narrow band-pass HTS filter with FBW of 0.02% in C band. Novel approaches to solve the weak coupling and unwanted parasitic coupling problems in narrowband filter design were introduced. The filter shows band rejection better than 23 dB at frequencies 500 kHz away from the center frequency. The measured minimum insertion loss is 3.8 dB, corresponding to unloaded Q-factors of about 45000. The return loss is better than 17 dB and the band-edge steepness reaches over 60 dB/MHz at both the high- and low-frequency edges.

Original languageEnglish
Title of host publication2015 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2015 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages591-592
Number of pages2
ISBN (Electronic)9781467381079
DOIs
Publication statusPublished - 15 Apr 2016
Externally publishedYes
EventIEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2015 - Shanghai, China
Duration: 20 Nov 201523 Nov 2015

Publication series

Name2015 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2015 - Proceedings

Conference

ConferenceIEEE International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2015
Country/TerritoryChina
CityShanghai
Period20/11/1523/11/15

Keywords

  • HTS
  • band-pass
  • filter
  • ultra-narrow

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