Design of a dual-wideband high temperature superconducting filter

•A quarter-wavelength stub-loaded dual-mode high temperature superconducting resonator is analyzed.•The resonance characteristics, coupling patterns, external factor and cross coupling structure are discussed.•The introduction of transmission zeros improves the selectivity of the filter.•The measure...

Full description

Saved in:
Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2021-10, Vol.589, p.1353937, Article 1353937
Main Authors: Yu, Xiao, Xi, Wei-Bin, Wu, Song-Tao, Yan, Pei-Guang
Format: Article
Language:English
Subjects:
Broadband
Cross coupling
Diameters
Dual-band
Filters
High temperature
HTS filter
Quarter-wavelength
Selectivity
Stub-loaded
Substrates
Superconductivity
Thin films
Wideband
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•A quarter-wavelength stub-loaded dual-mode high temperature superconducting resonator is analyzed.•The resonance characteristics, coupling patterns, external factor and cross coupling structure are discussed.•The introduction of transmission zeros improves the selectivity of the filter.•The measured results show that grounding technique has almost no influence on the filter. A 7-pole dual-wideband high temperature superconducting (HTS) filter based on a quarter-wavelength stub-loaded dual-mode resonator is introduced. The resonance characteristics, coupling patterns, external factor and cross coupling structure are discussed in turn. The filter is fabricated on a double side DyBa2Cu3O7 HTS thin film with a 2 inch-diameter and 0.5-mm-thick MgO substrate. The fabricated filter is measured at 77 K. The measured results show that the filter has an excellent in-band performance with center frequencies of 240 MHz, 541 MHz and passbands of 40 MHz, 140 MHz, respectively. Due to the introduction of transmission zeros, the selectivity of filter is further improved. The measured results agree with the simulated ones substantially.
ISSN:0921-4534
1873-2143
DOI:10.1016/j.physc.2021.1353937