Design of Dual-Mode Dual-Band Superconducting Filters

Pengyu Ma, Bin Wei, Jia-Sheng Hong, Bisong Cao, Xubo Guo, Linan Jiang

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)
179 Downloads (Pure)


This paper presents a synthesis design method for superconducting dual-mode dual-band filters. A low-pass to dual-band bandpass frequency transformation is proposed based on lossless lumped-element dual-mode resonator circuits. Formulas for extracting the coupling coefficient k and external quality factor Qe of dual-mode microstrip resonators are derived using the coupling matrix theory and the proposed frequency transformation formula. This makes the design process of dual-mode dual-band filters similar to that of the single bandpass filter. For the demonstration, four dual-band superconducting filters with different dual-mode resonator structures, such as stepped-impedance, stub-loaded, and embedded resonators are designed and fabricated. The measured results match well with the simulations.
Original languageEnglish
Article number1502809
Number of pages9
JournalIEEE Transactions on Applied Superconductivity
Issue number7
Early online date26 Jul 2017
Publication statusPublished - Oct 2017


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