Patent ID: 8522421

Claim:
A method of making a patch antenna, comprising the steps of: stamping a first metal plate to form a first plate body having a predetermined shape, and simultaneously, a first aperture in the first plate body and a first protruding portion that extends from a peripheral edge of the first aperture to thereby form a radiation metal layer; stamping a second metal plate to form a second plate body having a predetermined shape., and simultaneously, a second aperture in the second plate body and a second protruding portion that extends from a peripheral edge of the second aperture to thereby form a grounding metal layer; preparing a dielectric layer having a through hole; and attaching the radiation metal layer and the grounding metal layer to opposite surfaces of the dielectric layer to couple together the first protruding portion and the second protruding portion; wherein a first sub-feed-in hole is simultaneously formed when the first plate body is formed; a second sub-feed-in hole is simultaneously formed when the second plate body is formed; and a feed-in hole is formed when the dielectric layer is molded; the radiation metal layer and the grounding metal layer are attached to the dielectric layer that the first sub-feed-in hole and the second sub-feed-in hole are aligned with the feed-in hole before attachment.