Hybrid Finite Element/Waveguide Mode Analysis of Passive RF Devices.

摘要

A numerical solution for time-harmonic electromagnetic fields in two-port passive radio frequency (RF) devices has been developed, implemented in a computer code, and validated. Vector finite elements are used to represent the fields in the device interior and field continuity across waveguide apertures is enforced by matching the interior solution to a sum of waveguide modes. Consequently, the mesh may end at the aperture instead of extending into the waveguide. The report discusses the variational formulation and its reduction to a linear system using Galerkin's method. It describes the computer code, including its interface to commercial CAD software used for geometry generation. It presents validation results for waveguide discontinuities, coaxial transitions and microstrip circuits. They demonstrate that the method is an effective and versatile tool for predicting the performance of passive RF devices. Electromagnetics, Microwave circuits, Waveguides, Finite elements, Numerical methods, Computation, RF Components, Waveguide discontinuities.