Compact superconducting single- and dual-band filter design using multimode stepped-impedance resonator Project supported by the National Natural Science Foundation of China (Grant No. 61371009) and the Fund from the Chinese Ministry of Science and Technology (Grant No. 2014AA032703). |
(color online) (a) Traditional dual-mode stepped-impedance structure. (b) Odd-mode circuit of dual-mode structure. (c) Even-mode circuit dual-mode structure. |