| 摘要 |
<p>Provided is an antenna device in which antenna characteristics in a specific frequency band are improved to obtain the antenna characteristics in accordance with an intended use. The antenna device comprises a support board, a planar first radiation plate having a feeding point formed on a first surface of the support board, a transmission line electrically connected to the feeding point formed on the first surface and extending up to a side of the support board, and a planar second radiation plate formed on a second surface of the support board. The first and second radiation plates are each formed in line symmetry with respect to the centerline of the transmission line and/or the extended line of the centerline. At least one of the first and second surfaces has a dielectric which is formed in either one of the two regions located on mutually opposite sides of the center line of the transmission line and the extended line of the center line when viewed from the thickness direction of the support board.</p> |
