PATCH ANTENNA DEVICE

摘要

Provided is an on-vehicle patch antenna device which has reduced sizes and multiple functions with improved performance. An in-vehicle patch antenna device is provided with a substrate (10), a ground conductor (20) arranged on the substrate (10), an antenna element section (30) and a notifying circuit section (40). The antenna element section (30) is arranged on a surface facing a surface of the substrate (10) whereupon the ground conductor (20) is to be arranged, and provided with a power feed section (31) and a degeneracy-removing element section (32). The notifying circuit section (40) is arranged on the substrate (10), and connected close to a region where current distribution is minimum in the peripheral region of the antenna element section (30) other than a region whereupon the power feed section (31) is arranged.