Dual-Behavior Resonator (DBR) filters with spurious responses suppression
Résumé
This paper deals with the design of fourth-order dual-behavior resonator (DBR) filters with an integrated 3rd-order low-pass filter as central inverter and two capacitive-coupled dual behavior resonator (CCDBRs) filters. Our goal was the control of the spurious resonances on each side of the bandpass response associated to DBR filters. The proposed topology is described. Then, after realization of three different filters on an alumina substrate, their simulation and experimental data are compared and discussed.