Harada Industry Co., Ltd.

Shinji Ilno

Ryuichi Taira

Seiichi Wada

Provided is an in-vehicle patch antenna device which has a reduced size and multiple functions while improving performance. An in-vehicle patch antenna device includes a substrate (), a ground conductor () provided on the substrate (), an antenna element section () and a reporting circuit section (). The antenna element section () has a feeding section () and is provided on a surface of the substrate () opposite to a surface on which the ground conductor () is provided. The reporting circuit section () is provided on the substrate () and connected around an area in a periphery of the antenna element section () at which current distribution is minimal other than the peripheral area thereof where the feeding section () is provided.

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Tokyo, Japan

Shinji Ilno