Application of complex conical beams in reflector system analysis

This paper presents an overview of complex conical beams and techniques developed for their application in the analysis of reflectors and reflector antenna systems, realised either as full PEC surfaces or quasi-periodic, frequency selective surfaces. The various techniques link complex conical beams with Physical Optics, Spectral-Domain method and the Uniform Theory of Diffraction. The method is tested on several examples, including a frequency-selective dual-reflector system of the Gregorian type, designed for the operating frequency of 25 GHz.