| 摘要 |
<p>PROBLEM TO BE SOLVED: To efficiently realize a plurality of antenna gains. SOLUTION: An antenna gain switching device comprises a conductor which functions as an antenna, and a high-frequency processor having a modulator for outputting a high-frequency signal to the antenna or a demodulator for inputting the high-frequency signal from the antenna. The device further comprises a first connection point, connected to a predetermined position on the conductor for connecting the processor to the conductor, and a second connection point for connecting the conductor to a ground at a position different from the first point via a bypass capacitor. The device changes the position of the second point on the conductor and/or changes a value of a conductor current flowing to the conductor, so as to switch the antenna gain.</p> |
