Reconfigurable multiple beam satellite reflector antenna with an array feed

摘要

A reconfigurable multiple beam array antenna (10) for transmitting beams includes a reflector (20) and radiating elements (14(a-n)) for feeding beam signals to the reflector (20). The array antenna (10) includes a reconfigurable beam forming network (36) having a plurality of dividers (46(a-i)), a plurality of adjustable phase shifter and attenuator pairs (48(a-i)), and a plurality of combiners (50(a-n)) to form beam signals from beam signals input to the beam forming network (36). A first hybrid matrix (24) formed by an association of couplers (52) is connected to the beam forming network (36) for receiving the beam signals. Amplifiers (26(a-n)) receive and amplify the beam signals from the first hybrid matrix (24). A second hybrid matrix (22) formed by an association of couplers (54) is connected to the amplifiers (26(a-n)) for receiving the beam signals. The second hybrid matrix (22) provides the amplified beam signals to the radiating elements (14(a-n)) for the reflector (20) to transmit beams.