Three-dimensional computational analysis of radomes

Most of earlier investigations concerning radomes have been restricted to the cases that the radome is two dimensional, or the radome and the primary antenna are not too large compared to a wavelength, although there are increasing necessity in analysis and design of practical three dimensional large radomes. Recently, it has become possible to respond to this requirements by the appearance of high speed large computers. The purpose of this report is to analyze the radiation characteristics of an aperture antenna covered by an arbitrarily curved three dimensional large radome. In this analysis, the aperture antenna is also arbitrarily shaped, illuminated and located. Moreover, it is permitted that the radome is multilayered or even inhomogeneous. The analysis is essentially based on the method of local slab model approximation. The radiation patterns for various parameters of radomes are shown.