Analysis of microwave ferrite devices by the transfinite element method

A procedure for modeling microwave ferrite devices is presented that is based on the transfinite-element method. This method uses analytic basis functions to approximate the fields extending to infinity at the microwave ports. This procedure automatically satisfies the boundary conditions at the ports using the variational method along a single reference plane at each port. It is shown that this procedure is both easy to set up and inexpensive to solve. A computer implementation is described that gives the fields and scattering parameters in microwave devices of arbitrary two-dimensional geometry.<>