Patent ID: 9252499
Filing Date: 2016-02-02
CPC Classification: H01Q

Claim Text:
1. An antenna unit, comprising: a first substrate, comprising a first surface and a second surface, wherein the first surface is opposite to the second surface; a first conductive layer, disposed on the first surface; and a second conductive layer, disposed on the second surface, wherein the second conductive layer has a main opening which is surrounded by a plurality of first conductive vias electrically connecting the first and the second conductive surface, and the main opening and surrounding vias defines a radiation cavity; a first planar conductive ring, surrounding the radiation cavity; and a feed conductor, feeding a wireless signal to the antenna unit; wherein the feed conductor is located between the first conductive layer and the second conductive layer; wherein the antenna unit further comprises a second substrate and a patch, the second substrate is disposed on the second conductive layer and comprises a third surface and a fourth surface, the third surface is opposite to the fourth surface, the patch is disposed on the fourth surface above the main opening and is separated from the feed conductor, and the third surface contacts the second conductive layer.