Cross-Coupled Microstrip Dual Behavior Resonator (DBR) Filter
Résumé
This paper deals with the design of cross-coupled microstrip dual behavior resonator (DBR) filters. It evidences the several ways of cross-coupling DBR filters to get, in particular, either a high level rejection or a flat group delay with a 4th-order filter. The two coupling structures described here are based on the DBR to allow a positive or negative cross-coupling effect. In order to validate this concept three different filters were realized on an alumina substrate. Simulation and experimental data are compared and discussed.