Title :
Dual-band superconducting bandpass filter with embedded resonator structure
Author :
Yong Heng ; Xubo Guo ; Bisong Cao ; Zhijun Ying ; Bin Wei ; Xiaoping Zhang ; Guoyong Zhang ; Xiaoke Song ; Jingchen Wang
Author_Institution :
Dept. of Phys., Tsinghua Univ., Beijing, China
Abstract :
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.
Keywords :
band-pass filters; microstrip filters; resonator filters; superconducting filters; transforms; MgO; coupling coefficients; dual-band superconducting bandpass filter; embedded resonator structure; embedded single spiral resonators; frequency 2.985 GHz to 3.015 GHz; frequency 3.045 GHz to 3.075 GHz; frequency transformation method; microstrip filter; open-loop resonators; parasitic couplings; planar filter; synthesised resonator frequencies;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2013.1856
