Patent ID: 9692132
Date: 2017-06-27
CPC Classifications: H01Q

Claim:
1. An antenna apparatus, comprising; a dielectric substrate having two faces, in which a ground plate is formed on one substrate face of the two faces; a patch antenna provided with at least a single patch radiating element for power supply, the patch radiating element being formed on the other substrate face of the dielectric substrate, the other substrate face being opposite to the one substrate face on which the ground plate is formed, a predetermined direction on the substrate face of the dielectric substrate being set as a dominant polarized wave direction; a plurality of conductive structures provided with a patch-shaped conductor pattern formed on a substrate surface, which is the other substrate face, and a connecting conductor formed to pass through the dielectric substrate between the conductor pattern and the ground plate in order to electrically connect the conductor pattern and the ground plate, and a conductor plate, wherein the plurality of conductive structures are arranged such that a structure absent region is formed on the substrate surface by the conductive structures, the structure absent region completely including the patch radiating element of the patch antenna and excluding the conductor pattern of the conductive structure from the structure absent region; the conductor plate formed to enclose the patch radiating element in the structure absent region on the substrate surface; and when a line perpendicular to the dominant polarized wave direction and passing through substantially a center of the patch antenna in the dominant polarized wave direction is set as a patch line, the structure absent region is formed by the plurality of conductive structures such that, in both an area further towards one end side of the dielectric substrate relative to the patch line and an area further towards the other end side of the dielectric substrate relative to the patch line, an absent distance changes into a plurality of types depending on the position on the patch line, the absent distance referring to the distance in the dominant polarized wave direction from an arbitrary position on the patch line to the conductor pattern forming the boundary of the structure absent region.