A wideband microstrip balanced-to-single-ended out-of-phase power divider

A wideband microstrip balanced-to-single-ended out-of-phase power divider (BTSEOOPPD) is proposed in this paper. Two types of two-stage cascaded BTSEOOPPD are studied, which both show wider bandwidth comparing with the single stage one. Two prototypes of the two types of two-stage BTSEOOPPD are analyzed, designed and compared, and type II shows wider isolation bandwidth than that of type I.