Coplanar-Stripline Transition and Band-Stop Filters

Three coplanar-stripline circuits have been designed to perform coupling and filtering functions in microwave systems. These circuits could be incorporated into feed networks for microwave antennas, for example. One of the circuits comprises two back-to-back coplanar-strip-to-microstrip transitions. The other two circuits are coplanar-stripline band-stop filters. The principal advantages of these circuits over others designed to perform the same functions are compactness and suitability for integration into monolithic microwave integrated circuits.