An integrated design tool to construct lossless matching networks with mixed lumped and distributed elements

A design tool that combines the simplified real frequency technique of broadbanding with an appropriate application of algebraic network decomposition and replacement techniques is presented. The method incorporates the outstanding merits of modern single-variable broadbanding techniques, i.e. during the course of the design, there is no need to choose a circuit topology with mixed elements in advance, nor is it necessary to invent a realizable transfer function in two variables to measure the system performance. Examples are presented to exhibit the application of the tool, which is expected to be useful for constructing practical MMIC matching networks, since the fringing lumped element parasitics which arise due to the physical implementation can easily be adsorbed within the mixed element network structure