| 摘要 |
<p>In the disclosed device, an antenna unit (3) is provided with a switching diode (33) interposed in a signal line (L31) which is the signal path from an antenna (1), and another switching diode (34) interposed in a signal line (L32) which is the signal path from another antenna (2). The disclosed device is configured so as to connect the signal lines (L31, L32) after the part where each signal line has a switching diode (33, 34) interposed therein, to a coaxial cable (4); and so that the ON/OFF of the switching diode (34) depends on the direction of the DC current flowing through the coaxial cable (4), with the ON and OFF having an opposite relation, and the direction of the DC current flowing through the coaxial cable (4) is controlled by a control circuit (53) provided in a tuner section (5).</p> |
