The Accurate Actual-feed Illumination Technique for the Reflector Antenna

A shaping technique using the actual feed(AF) to illuminate the reflector antenna is proposed, which is compared with the conventional simulated feed(SF) after optimizing the reflector antenna patterns. The corresponding reflector shape is transformed by the non-uniform rational Bspline method, and its scattering field is gotten through the physical optics and Gauss-Legendre quadrature algorithms(PO-GLQ). The consequent calculated patterns by means of the actual feed are closer to the measured far-field ones than simulated feed.