| 摘要 |
PROBLEM TO BE SOLVED: To provide a time-division multiplex array antenna device capable of enhancing the SNR.SOLUTION: A time-division multiplex array antenna device 1 includes a digital filter 25 attached at the latter part of an A/D converter 16 through switches 23 and 24. When a reception path switching part 27 is in monitoring, or waiting for receiving a radio wave, an antenna 2 can be activated as a time-division multiplex array antenna by connecting switches 23 and 24 to a rearrangement part 17 side. When the reception path switch part 27 detects a reception of radio wave during the monitoring, and when the reception path switch part 27 acknowledges that the reception power ratio between each of the antennas 2 is large, a switch 8 of the antenna 2 having the largest reception power is connected permanently, and the switches 23 and 24 are connected to the digital filter 25 side, thus activating the antenna 2 as a single antenna. When the antenna is activated as a single antenna, a band limit for the digital signal received is performed by the digital filter 25 rather than signal rearrangement. |
