Title :
An Ultra-Low Loss 2 B Reconfigurable Superconducting Filter at P-Band
Author :
Zhijun Ying ; Bin Wei ; Bisong Cao ; Xubo Guo ; Xiaoping Zhang ; Guoyong Zhang ; Qirong Li ; Cheng Feng
Author_Institution :
Dept. of Phys., Tsinghua Univ., Beijing, China
Abstract :
A superconducting resonator, consisting of a microstrip spiral and a 2 b interdigital capacitor array, is proposed. The resonator has a measured unloaded Q over 51 000 in all four states. A two-pole reconfigurable superconducting filter at P-band with a fractional bandwidth of 1% is designed with this resonator and fabricated. The measurements show that the tuning range of the center frequency is from 499.4 to 484.9 MHz with insertion losses of less than 0.1 dB in all four states, and are in good agreement with the simulations.
Keywords :
superconducting filters; superconducting resonators; 2B reconfigurable superconducting filter; P-band; fractional bandwidth; frequency 499.4 MHz to 484.9 MHz; interdigital capacitor array; microstrip spiral array; superconducting resonator; tuning range; two-pole reconfigurable superconducting filter; Arrays; Bonding; Capacitors; High temperature superconductors; Microwave filters; Resonant frequency; Tuning; Interdigital capacitor; low loss; reconfigurable filter; superconducting;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2012.2235418
