Open AccessDual‐band superconducting bandpass filter with embedded resonator structure
Author(s) -
Heng Yong,
Guo Xubo,
Cao Bisong,
Ying Zhijun,
Wei Bin,
Zhang Xiaoping,
Zhang Guoyong,
Song Xiaoke,
Wang Jingchen
Publication year - 2013
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.2013.1856
Subject(s) - resonator , band pass filter , planar , microstrip , multi band device , filter (signal processing) , materials science , optoelectronics , helical resonator , coupling (piping) , prototype filter , spiral (railway) , passband , electronic engineering , physics , optics , low pass filter , computer science , electrical engineering , telecommunications , engineering , mechanical engineering , computer graphics (images) , antenna (radio) , metallurgy
A dual‐band superconducting microstrip filter with two passbands of 2.985–3.015 GHz and 3.045–3.075 GHz, respectively, is synthesised by a frequency transformation method. Open‐loop resonators with embedded single spiral resonators are proposed to realise the synthesised resonator frequencies and coupling coefficients. This structure has the advantages of compact size and weak parasitic couplings, which benefit the implementation of the dual‐band planar filter. The filter is successfully designed and fabricated on an MgO substrate. The measured results show high performance and match well with the simulations.