| 摘要 |
PROBLEM TO BE SOLVED: To provide a pole antenna capable of ensuring stable transmission/reception performance when a car is running at a very high speed. SOLUTION: The pole antenna 10 consists of an oblong base 13; a first antenna element 11 provided on the base 13; and a second antenna element 12 provided on the tip of the first antenna element 11, so as to be perpendicular to the longitudinal direction of the base 13, and in parallel to the installation surface of the base 13. The first antenna element 11 and the second antenna element 12 are configured so that an angle for the element 11 to be formed for the base 13, and an angle for the element 12 to be formed for the first antenna element 11 can be varied. This pole antenna is used as a pole antenna 10R provided on the right and left upper parts of a rear window shield and having directivity in the rear, and a loop antenna 10F having directivity in the front is provided on the right and left upper parts of a front window shield. This configuration can form a receiver capable of selecting and outputting good-sensitivity radio waves. COPYRIGHT: (C)2007,JPO&INPIT
|
