RAY-TRACING FIELDS BACKSCATTERED FROM CURVED DICHROIC STRUCTURES

Compared with computing the forward radiation patterns, modelling fiel ds backscattered from a curved dichroic surface enclosing an antenna u sing ray tracing, introduces further levels of path complexity between source and field points, A paraboloidal radome, with an FSS array sym metrically embedded in the dielectric wall, is used as an illustration of the influence that the relative source/field point locations have on the path multiplicity and on the sequence of high order backscatter ed ray paths. Results are presented for a ring slot FSS enclosing a wa veguide horn, including field distributions and Fewer backscattered in to the antenna.