| 摘要 |
PROBLEM TO BE SOLVED: To provide an automobile antenna capable of correcting the directivity of the antenna to a base station even if the direction of a rearview mirror is changed and the direction of the antenna is changed. SOLUTION: A first directivity correcting device 30 is connected to phase shifters 23-25 constituting a phased array antenna 21 built in a rearview mirror. A horizontal azimuth angle and a vertical inclination angle of the room mirror to an automobile are detected by an azimuth angle sensor 34 and first and second inclination angle sensors 35, 36 of the first directivity correcting device 30. Based on the detection data, phase angles of the phase shifters 23-25 are corrected by an azimuth angle/inclination angle computing device 37 and 1st to 3rd phase angle correction computing devices 38, 39 and 40 of the mirror, thereby correcting the directivity of the antenna to the base station. COPYRIGHT: (C)2007,JPO&INPIT
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