Patent ID: 8259686

Claim:
An array antenna system comprising: a plurality of transmit/receive modules including one transmitting path and first and second receiving paths, each transmit/receive module comprising: a first element antenna; a second element antenna; a first amplifier connected to the first element antenna, amplifying signals received by the first element antenna on the first receiving path; a second amplifier connected to the second element antenna, amplifying signals received by the second element antenna on the second receiving path; a first phase shifter on the first receiving path, configured to apply a predetermined phase shift amount to signals amplified by the first receiving amplifier; a second phase shifter on the second receiving path, configured to apply a predetermined phase shift amount to signals amplified by the second receiving amplifier; a third phase shifter configured to apply a predetermined phase shift amount to transmitting signals on the transmitting path; and a third amplifier connected to the first element antenna and the second element antenna, configured to amplify signals applied phase shift by the third phase shifter on the transmitting path, the signals amplified by third amplifier being commonly provided to the first element antenna and the second element antenna.