When we feed a reflector with a narrow beam feed antenna, the narrow beam will under-illuminate the reflector causing reduce the amplitude taper efficiency while decreasing the feed power spilled past the rim of the reflector. However, the feed sidel

In double reflector antennas feed, feed support beams and sub-reflector especially cause distribution losses and large blockings in antenna apertures. In previous studies, the spillover losses due to open-ended rectangular and circular sectio