| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a high-speed tuner antenna multiplexer appropriate for spread spectrum communication or the like using frequency hopping, so that high-speed switching of a tuning frequency can be performed and one antenna can be concurrently shared among a plurality of high frequency channels having multi-frequency bands. <P>SOLUTION: The antenna multiplexer comprises a plurality of couplers each composed of 2-terminal (n) paired circuits (n≥1), one terminal of each of the plurality of couplers is commonly connected to the one antenna, and the other terminal is connected to a plurality of transmitters/receivers. A diode switch provided in each of 2-terminal (n) paired circuits is switched at high speed while being linked with a frequency hopping timing of a spread spectrum signal, an arbitrary serial resonance circuit is selected out of 2-terminal (n) paired circuits in accordance with a resonant frequency closest to the hopping frequency, and each of the plurality of transmitters/receivers is capable of using one antenna individually or concurrently with the other transmitter/receiver. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
