High-temperature superconducting filter using self-embedding asymmetric stepped impedance resonator with wide stopband performance and miniaturized size

Wang Dan¹, Wei Bin^{1, †}, Heng Yong², Cao Bi-Song¹

(color online) Deviations of resonant frequencies between Topology I and Topology II at (a) fundamental frequency f₀ and (b) the first spurious frequency .