Abstract: A design of equally loaded, under varying traffic load conditions, high efficiency power amplifiers for a multibeam communication system is presented. Output beam contains signals of only one beam corresponding to its input beam. Signals arriving at the feed elements for an input beam "b", of the 1 to N beams, corresponding to an input beam "b", arrive in phase and add together, while signals arriving at said feed elements for the output beam "b" corresponding to the remaining input beams arrive in antiphase and cancel one another by appropriate selection of two set of fixed input and output phase shifters. The output beams are shaped to produce a small reduction of power at the crossover point of adjacent beams. MMIC and high Tc superconducting designs, including the design of high Tc superconducting reflector antenna, are presented.