Composite body-of-revolution and arbitrary surface analysis using the method of moments

The need to predict the performance of a particular class of cavity-backed patch-fed antennas has motivated the development of combined body-of-revolution (BOR) and arbitrary surface analysis. The technique is general in the sense that it is useful for the radiation and scattering analysis of many objects which can be broken down into circularly symmetric portion and an arbitrary nonaxisymmetric portion. The use of special basis functions for the BOR part of the geometry results in substantial reductions in computation times as well as increased accuracy over using arbitrary surface models for the whole structure. Only the perfectly electrically conducting case is discussed. The cavity-backed antennas analyzed using the moment method are unique in that they are excited by large conducting patches in the plane of the aperture.<>