Patent ID: 8618985

Claim:
A patch antenna comprising: an dielectric substrate; a patch that is formed on a first surface of the dielectric substrate and provides a first frequency characteristics; and a ground plane that is formed on a second surface of the dielectric substrate, wherein an impedance matching means, that is capacitively coupled with the patch, is formed on one side of the ground plane; wherein the impedance matching means is comprised of: a T-shaped slot formed in a bottom area of the ground plane; and a T-shaped feeder line formed inside of the T-shaped slot and being separated by a predetermined distance therefrom; and wherein the T-shaped feeder line is formed at a location where a bar-shaped head of the T-shaped feeder line can face a bottom area of the patch so as to provide a second frequency characteristics by adjusting the size of the T-shaped slot and the T-shaped feeder line.