| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a vehicle antenna device which realizes directivity corresponding to various diversity systems in the same antenna configuration and can have high reception sensitivity performance. <P>SOLUTION: In a vehicle antenna device, a first antenna 101 and a second antenna 102 are made of conductive material and are respectively pasted on a rear window pane 108 along right and left sides of the rear window pane 108. A first ground wire 109 and a second ground wire 110 are respectively arranged perpendicularly to the first antenna 101 and the second antenna 102 from vicinity of the first antenna 101 and the second antenna 102. A short circuit point between the first ground wire 109 or the second ground wire 110 and a ground of a vehicle 100 is switched by high frequency switches 111 and 112, according to a diversity system. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
