| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna array system which reduces the cost of a radio receiver and improves ability by connecting antenna signals from a different antenna through the use of at least one delay line in the radio frequency route of an antenna. SOLUTION: The different antennas 14a and 14b having spatial separation and/or different polarized waves are contained in the antenna array system 12. A coupler 16 connects the signals from the different antennas 14a and 14b by using the delay line 22. The antenna signals are connected in a radio frequency area before A/D conversion by an analogdigital(A/D) converter 18 in the remaining part 20 of the receiver 10. The antenna 14b is connected to the delay line 22. The delay line 22 is set so that it brings the delay phase rotation of the center frequency of a channel to be received. The delay line 22 is set to the delay phase rotation of 0, 90, 180 and 270 degrees, or the delay line 22 can be set to different phase rotation, for example. |
