EM-Based Design of Microwave Filters and Diplexers: Full-Wave Coupling Matrix and Its Narrowband Counterpart

Microwave filter and diplexer design is getting more and more complicated due to the increasing demand of communication services. A better understanding of electromagnetics is provided in this work for coupled resonator EM circuits. The goal is to assist the microwave engineer with a full-wave solver which provides valuable design information in a form the engineer is familiar with, namely, a coupling matrix of the coupled resonator EM circuit. A microwave filter and diplexer will show the capabilities and possibilities of this approach.