Patent ID: 8587480

Claim:
A patch antenna comprising: an upper patch; a lower patch that is divided into a plurality of patch groups each having a plurality of patch pieces that are separated by a plurality of slots; a first dielectric layer that is provided between the upper patch and the lower patch, wherein the upper patch which is a plate and the plurality of patch pieces of the lower patch are electrically connected by holes passing through the first dielectric layer; a second dielectric layer that is provided on a lower surface of the lower patch; a ground plate that is provided on a lower surface of the second dielectric layer and is insulated from the lower patch; a through hole that passes through the upper patch, the first dielectric layer, the second dielectric layer and the ground plate; and a feeding line that passes through the through hole, one end of the feeding line is connected to a feeding point of the upper patch, wherein the plurality of patch groups are separated from each other, each of the patch groups being formed in a triangle shape, wherein a resonance frequency of the patch antenna is adjustable through an adjustment of a gap between the plurality of slots, wherein the thickness of the first dielectric layer is larger than that of the second dielectric layer, and wherein the second dielectric layer has a higher relative dielectric constant than that of the first dielectric layer.