An A, B-polar approach for multimode polarization analysis in satellite communications

This paper describes a convenient method of polarization analysis for a circular multimode aperture antenna by decomposing the field distribution into two components called A, B-polar. The new idea in this technique is the separation of the A, B-polar for field expression into a rotationally symmetric magnitude function and an orientation function independent of the antenna off-axis. This leads to easily sketched figures of the multimode polarization patterns which give a clear physical picture on their effects and applications. Several examples are done in the context of the frequency reuse capabilities of earth-station antennas.