Abstract: The incident plane wave is expanded into a series of fields of three-dimensional complex rays,the penetrations of rays through a multilayered radome and the reflections of rays through a reflector antenna are analyzed,and the resultant scattered fields are obtained by a complex ray equivalent source method.A general automatical searching program for reflections,refractions,and penetrations is designed and can be used for RCS analysis of an antenna and a radome. A numerical example is also given.

Key words: antenna components, radar cross sections, electromagnetic scattering