Ka-band mobile-vehicular active phased array antenna system for mobile satellite communications

摘要

This paper describes a Ka-band active phased array antenna system under development for the COMETS mobile terminals. ^The COMETS is the Japanese communications and broadcasting engineering test satellite, which will be launched in 1998. ^We are now planning advanced experiments on mobile communication by satellite using the Ka-band. ^The Ka-band active phased array is the most technically challenging component in the COMETS system development. ^The active phased array consists of 168 microstrip antennas with MMIC phase shifters and MMIC low noise amplifiers. ^The active phased array will provide a minimum G/T of -6.8 dB/K at an elevation of over 42 deg at 21 GHz. ^The array size is 110 x 120 mm. ^(Author)