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Parallel-coupled linear-phase superconducting filter

  • Article
  • Electronics
  • Published:
Chinese Science Bulletin

Abstract

A novel double coupling planar structure (a single microstrip line coupled with two resonators coincidental) is presented for the first time. Based on this structure, a six-pole parallel-coupled high-temperature superconducting band-pass filter with both linear phase response and quasi-elliptic function response is designed. The filter has a 40 MHz passband with a center frequency of 2,000 MHz. Its dimension is 18.67 mm × 25.96 mm. At 77 K, minimum insertion loss is 0.26 dB in passband. The group delay variation is <3 ns over 70 % of the filter bandwidth.

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Authors and Affiliations

  1. School of Astronautics & Aeronautics, University of Electronic Science and Technology of China, Chengdu, 610054, China

    Tianliang Zhang, Kai Yang, Yifei Zhang & Hui **

  2. School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu, 610054, China

    Zhengxiang Luo

Authors
  1. Tianliang Zhang
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  2. Kai Yang
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  3. Yifei Zhang
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  4. Hui **
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  5. Zhengxiang Luo
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Correspondence to Tianliang Zhang.

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Zhang, T., Yang, K., Zhang, Y. et al. Parallel-coupled linear-phase superconducting filter. Chin. Sci. Bull. 59, 1925–1928 (2014). https://doi.org/10.1007/s11434-014-0221-x

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  • DOI: https://doi.org/10.1007/s11434-014-0221-x

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