Efficient CAD of Boxed Microwave Circuits Based on Arbitrary Rectangular Elements

摘要

In this paper, we describe a very accurate andcomputationally efficient computer-aided design (CAD) tool forthe analysis and design of a wide class of boxed microwavecircuits composed of arbitrary rectangular elements printed ondielectric layers. The theoretical derivations are based on anintegral equation formulation, and call for the evaluation of theboxed multilayer Green's functions, thus leading to a tool that isvalid for an arbitrary number of circuits and dielectric layers.In addition to theory, comparisons with measured results arepresented, and several practical filter structures are also investi-gated, thus clearly demonstrating that the CAD tool developedcan indeed be used very effectively for the design of a largevariety of microwave circuits.