| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To solve the following problem: radiation property of an antenna may be deteriorated by making antennas of communication systems for UHF-band terrestrial digital broadcast and ITS communication close to each other when mounting these communication systems having proximate frequencies on a vehicle. <P>SOLUTION: In order to prevent transmitting/receiving operations from being interfered to each other inside a high-frequency circuit section by sharing an antenna for terrestrial digital broadcast and ITS communication, the operations are divided in frequency or in time, so as to prevent interference. Thus, the antenna and circuit components can be shared and costs can be remarkably reduced. Further, by providing a plurality of wireless communication sections, stable communication can be performed even under mobile communication conditions. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
