SPI Proceedings: Response of Non-uniform Microstrip lines to an EM Field Using Rigorously Coupled Multi-Conductor Strips Model

A model for two-dimensional analysis of microstrip lines, called rigorously coupled multi-conductor strip (RCMS) is introduced. In this model, the width of the strip of a microstrip line is subdivided into a large number of rigorously coupled narrow strips. So, a microstrip line can be considered as a coupled multi-conductor transmission line. Determination of the capacitance and inductance matrices of the model is introduced, also. The voltages and currents induced by electromagnetic fields for the coupled multi-condutor strips problem with non-uniformity in its width can be obtained using Bernardi´s method and the modal decoupling method. Finally, the validity and efficiency of the introduced method is investigated using full wave EM-simulation.