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

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Ming-En Tian
  • Zhi-He Long
  • You Lan
  • Lei-Lei He
  • Tian-Liang Zhang

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number058503
Journal / PublicationChinese Physics B
Volume30
Issue number5
Online published4 Jan 2021
Publication statusPublished - May 2021

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.

Research Area(s)

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

Citation Format(s)

Design of sextuple-mode triple-ring HTS UWB filter using two-round interpolation. / Tian, Ming-En; Long, Zhi-He; Lan, You et al.
In: Chinese Physics B, Vol. 30, No. 5, 058503, 05.2021.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review