| 摘要 |
PROBLEM TO BE SOLVED: To obtain an antenna device for receiving digital broadcasting capable of obtaining high-level reception characteristics even if applied to a mobile body such as an automobile. SOLUTION: The signal of a digital broadcast wave received by four antennas 21-24 provided to rear quarter window glasses 14L, 14R and tuned so as to have omnidirectional characteristics is subjected to in-phase synthesis by two in-phase synthesis circuits 36, 38. The signal after the in-phase synthesis is subjected to diversity synthesis by a diversity synthesis circuit 56 constituting a receiver 54. By this, the high-level reception characteristics of the digital broadcast wave can be obtained. COPYRIGHT: (C)2006,JPO&NCIPI
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