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) Layout and (b) coupling structure of the dual-band filter by using the quadruple-mode stepped-impedance resonator. |