| 摘要 |
PROBLEM TO BE SOLVED: To provide a millimeter wave radio transmitter, a millimeter wave radio receiver and a millimeter wave radio communication system in which a wide radio transmission area can be obtained in a millimeter wave band and a sufficient transmission distance at a low loss can be ensured. SOLUTION: A plurality of millimeter wave band transmitters 35a, 35b, 35c obtained by integrating a transmission antenna 104 and a transmission part (containing a millimeter wave band up-converter 30) are provided. The respective transmission antennas 104 of the plurality of millimeter wave band transmitters 35a, 35b, 35c are disposed so that at least one of an azimuth and an angle of elevation of the transmission antennal 104 differs, and a radiation pattern of a radio signal wave 111 by the respective transmission antennas 104 is widened. Radio signal waves 111 of a millimeter wave band transmitted from the plurality of millimeter wave band transmitters 35a, 35b, 35c are received, respectively, by millimeter wave band receivers 45a, 45b, 45c obtained by integrating a reception antenna 11 and a reception part (containing a frequency down-converter 40). COPYRIGHT: (C)2003,JPO
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