Application Of Equivalent Paraboloid Antenna And Equivalent Feed Methods For Off-Focus Fed Dual Asymmetric Reflectors

Abstract

Off-focus fed reflector antennas are preferred to prevent loss due to aperture blockage effect of secondary reflector and feed in the reflector antenna system. For this reason, it is important to calculate the radiation pattern in the direction of the main beam, especially for single and double reflector antennas with feeder antennas or antenna arrays shifted from the focal point. In this study, a new formulation is given for the acceleration of the calculation by applying the Physical Optics method is modeled by using a paraboloid reflective antenna with equivalent paraboloid and equivalent feed techniques in 3-D off-focus fed and asymmetric structures of dual antenna systems used in satellite-earth stations.