| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an antenna having no need of a transmitting-receiving duplexer. <P>SOLUTION: The antenna 120 includes: a transmitting line antenna element 120a and a receiving line antenna element 120b. The antenna element 120a is matched to a transmitting line transmission path impedance which includes a baseband processor 102, a power amplifier 104 and a directional coupler 106. The antenna element 120b is matched to a receiving line transmission path impedance which includes a low noise amplifier 110, a band-pass filter 108 and the baseband processor 102. The transmitting and receiving line transmission path impedances differ from each other, and by the antenna element matching each transmission path impedance, a transmitting signal and receiving signal can be separated without the transmitting-receiving duplexer. <P>COPYRIGHT: (C)2008,JPO&INPIT |
