Novel Reconfigurable Filtering Rat-Race Coupler, Branch-Line Coupler, and Multiorder Bandpass Filter With Frequency, Bandwidth, and Power Division Ratio Control - Zhu, Xu; Yang, Tao; Chi, Pei-Ling; Xu, Ruimin (IEEE transactions on microwave theory and techniques, 2020)
Keywords: Admittance; Bandpass filters; Bandwidth; Bandwidth tuning; Bandwidths; Circuits; Couplers; Coupling; Couplings; Division; filtering branch-line (quadrature) coupler (FBC); filtering rat-race (hybrid) coupler (FRC); Frequency ranges; Multipoles; power division ratios (PDRs); reconfigurable coupler; reconfigurable filter; Reconfiguration; Resonant frequency; Resonators; Tuning