Historical review of reflector antenna systems developed by MELCO

Summary form only given, as follows. Mitsubishi Electric Corporation (MELCO) has developed many novel reflector antenna systems and made them practicable in co-operation with customers such as NTT (Nippon Telegraph and Telephone Corporation), KDD (Kolcusai Densin Denwa Corporation), NASDA (National Space Development Agency of Japan), ISAS (The Institute of Space and Astronautical Science), NAOJ (National Astronomical Observatory of Japan) and so on. The historical reflector antenna systems developed by MELCO are introduced in detail. Earth station antennas include: (1) first practical Cassegrain antenna; (2) first practical offset Cassegrain antenna; (3) offset Cassegrain antenna with elliptical beam; (4) Nobeyama 45 m radio telescope; (5) Usuda Deep Space Centre 64 m antenna; (6) dual beam Earth station antenna. Satellite antennas include: (1) shaped beam antennas; (2) multi-beam antennas; (3) dual overlapped gridded reflector antenna; (4) large deployable reflector antenna.