Title :
Dual-Band Superconducting Bandpass Filter Using Stub-Loaded Resonators With Controllable Coupling and Feeding Structures
Author :
Yong Heng ; Xubo Guo ; Bisong Cao ; Bin Wei ; Xiaoping Zhang ; Guoyong Zhang ; Xiaoke Song
Author_Institution :
Dept. of Phys., Tsinghua Univ., Beijing, China
Abstract :
A four-pole dual-band bandpass filter is designed with stub-loaded resonators and dual-feeding structure. The stub-loaded resonator generates two resonant modes, and the interstage couplings between the resonators at the two modes can be controlled independently. A dual-feeding structure is proposed to meet the required external couplings of the two passbands simultaneously. The filter is successfully designed and fabricated on a MgO substrate with a compact size of 29.2 mm × 13.8 mm. The measured results show high performance and agree well with the simulations.
Keywords :
band-pass filters; magnesium compounds; poles and zeros; resonator filters; superconducting filters; superconducting resonators; MgO; controllable coupling; dual-band superconducting bandpass filter; dual-feeding structure; four-pole dual-band bandpass filter; interstage couplings; resonant modes; size 13.8 mm; size 29.2 mm; stub-loaded resonators; Dual-band bandpass filter (BPF); high-temperature superconducting (HTS); microstrip; stub-loaded resonator (SLR);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2013.2269040
