Open AccessTri‐band superconducting bandpass filter with controllable passband specifications
Author(s) -
Feng Yuning,
Guo Xubo,
Cao Bisong,
Wei Bin,
Zhang Xiaoping,
Song Fei,
Lu Xilong,
Xu Zhan
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2014.2352
Subject(s) - band pass filter , passband , electronic filter topology , voltage controlled filter , m derived filter , high pass filter , band stop filter , prototype filter , filter (signal processing) , stub (electronics) , butterworth filter , multi band device , electronic engineering , constant k filter , materials science , resonator , optoelectronics , filter design , physics , low pass filter , optics , computer science , electrical engineering , telecommunications , engineering , antenna (radio)
A compact tri‐band bandpass filter is designed by combining a dual‐band sub‐filter and a single‐band one. The dual‐band sub‐filter comprises four stub‐loaded resonators. The single‐band sub‐filter is inserted into the gaps of the dual‐band sub‐filter for size miniaturisation. Both the centre frequencies and the bandwidths of the three passbands can be independently controlled. The measurements of the fabricated superconducting filter exhibit high performance and match well with the simulations.