CONTOURED BEAM ANTENNAS OF OFFSET PARABOLOID REFLECTORCIRCULARLY POLARIZED FEED ARRAY

The approach for the Jacobi-Bessel series expansion of the physical opties radiation integral studied by R. Mittra et al. is extended to the case of eireularly polarized illumination, and a computation technique for the eireularly polarized contoured beam of the offset reflector antennas is analysed. This paper deals with the following pro-blems: the mathematical model of eireularly polarized feed, the equivalent distribution of reflector projected aperture, the secondary radiation field formula of offset parabolid reflector and the EIRP computation formula of the contoured beam. The EIRP/W contour-plot for the western zone coverage of the territory of China is given (illumination by 7-element feed array).