Computer-aided synthesis of commensurate line network and its application in MMICs

A useful theorem which extends a previously introduced lossy transformation technique to more general applications is proposed for transformation between distributed lossy and lumped lossless networks, and a corollary is given for extension of the well-known Kuroda identities to the general lossy case. A computer-aided approach is developed for the synthesis of lossy commensurate line networks with all lines having arbitrary frequency-dependent losses. As an application, two broadband amplifiers are designed for monolithic microwave integrated circuits (MMICs) and their performances are compared with the examples in earlier literature. It is shown that the ripples of the lossless gains are much less than those of the initial gain responses presented in the literature