| 摘要 |
PROBLEM TO BE SOLVED: To improve the reception performance of loop antennas for digital terrestrial TV broadcast reception, which is stuck to a windshield of a vehicle. SOLUTION: An antenna device for a vehicle is equipped with at least one loop antenna 10A, 10D having a directivity in a direction parallel with a front-and-rear direction of the vehicle and at least two loop antennas 10B and 10C having directivities in directions deviated from the direction parallel with the front-and-rear direction of the vehicle, all the loop antennas being installed near a conductor constituting the vehicle. The loop antennas 10A and 10D having the directivity in the direction parallel with the front-and-rear direction of the vehicle are installed near right and left upper end parts of a front window 1 when viewed from the inside of a vehicle compartment, and at least two loop antennas 10B and 10C having directivities in directions deviated from the direction parallel with the front-and-rear direction of the vehicle can be disposed adjacent to the loop antennas 10A and 10D. COPYRIGHT: (C)2009,JPO&INPIT |
