Shaping techniques for offset fed dual reflector antennas

A shaping scheme is presented for the design of offset-fed dual reflector antennas for substantial performance improvement. The design procedure of a shaped system starts with a proper choice of a nonshaped offset system as a reference. This baseline is used to optimize the location of the feedhorn and the centers of the reflectors. The shaping program then uses these inputs and generates the numerical profiles of the reflectors to achieve the desired aperture distribution. After shaping, the reflector profiles would deviate from that of the baseline system by only a small amount compared to the dimensions of the antenna.