| 摘要 |
PROBLEM TO BE SOLVED: To obtain high antenna output from radio equipment by executing the best adjustment of a matching circuit matched with characteristics of an antenna element. SOLUTION: The matching circuit composed of the radio equipment 1, a battery 2, and in addition to them, a coil 6, a condenser 9, and switching circuits 5, 7, 8 and 10, is provided to a portable case 15. Further, a directional coupler 11, a detection circuit 13, and a micro computer 3 are provided. The output voltage of the detection circuit 13, which detects the reflected power from an antenna 14, is taken into the micro computer 3. Each switching circuit is controlled by the micro computer 3 so that the output voltage becomes the best value. COPYRIGHT: (C)2004,JPO&NCIPI
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