Patent attributes
A patch antenna includes a ground electrode arranged on one surface of a dielectric layer, a first patch which has a shape of a trapezoid, is arranged inside the dielectric layer and radiates a signal having a first frequency, a second patch which has a shape of a trapezoid, is arranged on the other surface of the dielectric layer and radiates a signal having a second frequency, and two conductors which connect the short sides of the two patches with the ground electrode. The two patches are arranged such that the short sides are both located on the side of the same end of the dielectric layer. The first patch is fed power via a feeding point near the short side, and the second patch is fed power via a feeding point which is located between the end of the dielectric layer and the short side of the first patch.
