RF Module
Minicourse Kit
Order your free copy of the Minicourse Kit here
Free Download
For COMSOL Access users
Order your free copy of the Minicourse Kit here
Free Download
For COMSOL Access users
Engineers working with wireless equipment can benefit significantly from the finite element modeling of electromagnetic waves. They can correlate important engineering parameters such as impedances, radiation patterns, and S parameters to antenna geometries and obstructing objects. This document contains four examples of electromagnetic wave models you can build from scratch in the RF Module for COMSOL Multiphysics.
- The first model shows the transition between a rectangular and an elliptical waveguide. It uses the RF Module’s boundary mode analysis to determine the shape of the wave that leaves through the elliptical window. It calculates the scattering S-parameters that measure the transmission and reflection of the wave.
- The second example is a conical antenna where axial symmetry reduces the problem size. It shows many of the features in the RF Module that are important for antenna design including S-parameter analysis, frequency sweep, and far-field calculations.
- The third model demonstrates a nonreciprocal microwave component. A small cylinder of a gyrotropic material in a three-port waveguide junction causes it to act as a matched coupler for waves propagating in in one direction and an isolator for waves propagating in the other direction.
- The final example models thermal drift in a microwave filter. This multiphysics model uses three application modes: shell expansion, moving mesh, and electromagnetic waves. It also employs the powerful COMSOL Script language to perform some of the steps.