| 摘要 |
PROBLEM TO BE SOLVED: To provide an array antenna with which the number and arrangement positions of antenna elements can be easily changed even after an array antenna is manufactured, and even if an amplifier inside the array antenna falls into fault or the like, the amplifier can be easily repaired, and to provide an antenna unit and a bus unit used in the array antenna. SOLUTION: An array antenna includes a bus unit 10 and antenna units 20-1 to 20-m. The antenna units 20-1 to 20-m are connected to connecting connectors 11-1 to 11-n formed at arbitrary positions on the bus unit 10. In the antenna units 20-1 to 20-m, a transmission signal from a first line 12 is distributed into two by a distribution circuit 22 and one of them is returned to the first line 12 as a distribution signal. Furthermore, in the antenna units 20-1 to 20-m, a reception signal received by an antenna element 27 and a reception signal from a second line 13 are combined by a combination circuit 23 and output to the second line 13. COPYRIGHT: (C)2011,JPO&INPIT
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