Superconducting tunable filter with constant bandwidth using coplanar waveguide resonators

Jiang Ying¹, Li Bo², Wei Bin^{1, †}, Guo Xu-Bo¹, Cao Bi-Song¹, Jiang Li-Nan¹

(color online) Variations of simulated coupling coefficient k₁₂ with resonance frequency for different values of l and k. The dashed line represents the desired results calculated from Eq. (2).