| 摘要 |
<P>PROBLEM TO BE SOLVED: To detect communication abnormality by distinguishing every cause for the abnormality in a planar antenna device for a vehicle such as a film antenna device and a glass antenna device. <P>SOLUTION: The antenna device includes: an antenna portion where a ground pattern and an antenna pattern of an antenna element are formed on a substrate; and a pickup portion feeding power to the antenna portion. The antenna portion has a resistance portion including a resistor printed on the substrate with a resistance higher than at least the antenna pattern, and the ground pattern and the antenna pattern are connected via the resistance portion. <P>COPYRIGHT: (C)2012,JPO&INPIT |
