Study of a C-band cross-coupled dual-behavior resonator filter with spurious responses suppression for a space application

This paper deals with the design of a C-band fourthorder cross-coupled Dual-Behavior Resonator (DBR) filter integrating two 3
^rd
-order low-pass filters and one capacitivecoupled dual behavior resonator (CCDBR) filter. The aim was the control of the spurious resonances on each side of the bandpass response. Moreover, to enhance the rejection and obtain a flat group-delay, we used the cross-coupled technique. The proposed topology is described at first. Then, the experimental data produced by this filter realized on an alumina substrate are compared with those of a classical hairpin filter. This filter is dedicated to equip a satellite.