Radiation patterns of a dual reflector system based on the geometrical optics approximation

In this report the two-dimensional radiation patterns of an array-fed dual reflector system are computed and presented. For the purpose of preliminary study of the feasibility of this system, the pattern is computed by means of an approximate geometrical-option method. Results show that the radiation patterns of this system are well behaved, exhibiting no difficulty in beam steering. They also show that a modest sidelobe level can be achieved (30 dB or better). For better pattern synthesis and optimum array spacing, however, further work is required.