Design of elliptical and offset reflector antennas using Gaussian beam theory

Procedures for applying Gaussian beam theory to reflector antenna design are discussed, and a suggested method for generalising inverse square law factors in a mixed Gaussian-ray geometry illustrated. These methods allow practical designs to be generated with almost negligible computation, in unusual geometries. In the practical elliptical antennas described, Gaussian beam concepts have led to a single-lens configuration, involving a real imaged waist in one plane