Title :
UHF band switchable superconducting filter with pin diode switches
Author :
Xiaoke Song ; Bin Wei ; Bisong Cao ; Xubo Guo ; Xiaoping Zhang
Author_Institution :
State Key Lab. of Low-Dimensional Quantum Phys., Tsinghua Univ., Beijing, China
Abstract :
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.
Keywords :
UHF filters; high-temperature superconductors; p-i-n diodes; resonator filters; superconducting filters; superconducting switches; PIN diode switches; UHF band switchable superconducting filter; bandwidth 29 MHz; frequency 516 MHz; high Q resonators; insertion loss; interdigital capacitors; low-loss switchable superconducting filter; return loss; two-pole 2 bit switchable high-temperature superconducting filter;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2014.0818
