Advanced Microwave Balanced Structures on Coplanar Stripline (CPS) with Intrinsic Common-Mode Suppression

In this paper, a series of generalized structures based on coplanar stripline (CPS) has been intensively discussed. Featuring their intrinsic common-mode (CM) suppression, these proposed CPS-based arrangements could be intuitively designed solely upon the differential-mode (DM) equivalent circuit models as attributed to the inherently balanced transmission-line (TL) topologies. Consequently, a total of four kinds of advanced CPS-based configurations, including series-stub structure, shunt-stub structure, microstrip-to-CPS transition, and stepped-impedance multimode resonators (MMRs) have been thoroughly studied by virtue of the operating mechanism and synthesis design method.