A compact high-T c superconducting quarter-wavelength SIR bandpass filter

Ting Zhang*, Yong Cai, Jia Du, Ying Jay Guo, Xiao Wei Sun

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

1 Citation (Scopus)

Abstract

A compact high-temperature superconducting bandpass filter for wireless communications is proposed in this paper. The filter consists of four quarter-wavelength short-circuited stepped impedance resonators (SIR). A pair of transmission zeros outside the passband are introduced into the design by evaluating coupling coefficients between the four resonators for high selectivity within the frequency band of interest. The use of short-circuited quarter-wavelength SIRs has resulted in a higher spurious passband than conventional half-wavelength coupled-line filters. Based on the theoretical calculations, the filter has a compact size and exhibits a well suppressed stopband. The filter is fabricated on an MgO substrate with YBCO superconductor coating. Simulation and measurement results are presented.

Original languageEnglish
Title of host publicationASEMD 2011
Subtitle of host publication2011 International Conference on Applied Superconductivity and Electromagnetic Devices
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages123-126
Number of pages4
ISBN (Electronic)9781424478538, 9781424478514
ISBN (Print)9781424478521
DOIs
Publication statusPublished - 2011
Externally publishedYes
Event2011 International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2011 - Sydney, NSW, Australia
Duration: 14 Dec 201116 Dec 2011

Other

Other2011 International Conference on Applied Superconductivity and Electromagnetic Devices, ASEMD 2011
CountryAustralia
CitySydney, NSW
Period14/12/1116/12/11

Keywords

  • high-Tc superconductor
  • bandpass filter
  • stepped impedance resonator
  • transmission zero

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