Open AccessUHF band switchable superconducting filter with pin diode switches
Author(s) -
Song Xiaoke,
Wei Bin,
Cao Bisong,
Guo Xubo,
Zhang Xiaoping
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2014.0818
Subject(s) - insertion loss , return loss , materials science , pin diode , optoelectronics , resonator , ultra high frequency , capacitor , bandwidth (computing) , filter (signal processing) , superconductivity , diode , electrical engineering , physics , telecommunications , engineering , voltage , quantum mechanics , antenna (radio)
A low‐loss switchable superconducting filter is presented. High Q resonators loaded with switchable superconducting interdigital capacitors are introduced. A two‐pole 2‐bit switchable high‐temperature superconducting (HTS) filter at 516 MHz with a bandwidth of 29 MHz is designed and fabricated. The measured centre frequency tuning range is 33 MHz (6.4%). In all states, the HTS filter with pin diode switches exhibits an insertion loss <0.81 dB and a good return loss better than 16.8 dB.