| 摘要 |
PURPOSE:To eliminate the need for an antenna common unit and to attain miniaturization by providing three antennas, and connecting the one to a transmitter and the other two to a receiver so as to narrower the specific band width requested to each antenna. CONSTITUTION:The 1st-3rd microstrip antennas 1-3 are placed on a case 4 having a transmitter 6 and a receiver 5. Then the antenna 1 is connected to a transmission section 7 and the antennas 2, 3 are connected to a reception section 8 respectively. The antennas are constituted separately for the transmission and reception in this way, then the specific band width requested to the antennas 1-3 is narrowered and the antennas are miniaturized. Further, the antenna common unit is not required to attain miniaturization of the radio equipment.
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