Bifocal reflector antenna design procedure for wide-angle multi-beam applications

This paper presents an approach of design and optimization of the multi-beam bifocal reflector antennas (BFRAs) that are synthesized in accordance with the novel designing procedure. A geometrical optics approximation that takes into account the cross-polarization distortions is used to estimate the aperture efficiency. It is also proposed to use an additional criterion (surface area efficiency) for comparison of efficiencies of reflector antennas with big subreflectors. The design of multi-beam BFRA with a Gregorian-like configuration in the symmetry plane that have 38° field of view and high directivity up to 55 dB is presented as an example.