MULTIBEAM ANTENNA DEVICE FOR SATELLITE LOADING

摘要

PROBLEM TO BE SOLVED: To obtain a multibeam antenna device for a satellite loading in which beams are arranged so as to increase a crossover level in order to lower a gain reduction by a pointing error, a null of an antenna beam is formed in an identical frequency direction, and also an interference between the beams is decreased by using the orthogonality between the beams.;SOLUTION: The antenna device is configured so as to obtain the orthogonality between the beams by arranging beams so that peaks of the beams of an identical frequency are overlapped in a null direction of a certain beam, and forming the beams so that the peaks of the two or more beams of the identical frequency coincide with a null point. Thus, an interference level caused by the identical frequency can be reduced, the crossover level can be raised, and a gain enhancement can be materialized.;COPYRIGHT: (C)2009,JPO&INPIT