Patent ID: 8432318

Claim:
A capacitive antenna structure, comprising: a substrate having a front surface and a rear surface, the front surface having a radiating metal layer thereon, the radiating metal layer having a first groove to expose the front surface of the substrate, the first groove having a signal feeding hole therein, the radiating metal layer having a second groove on the edge, and the rear surface having a grounding metal layer, the grounding metal layer has a third groove on the edge to expose the rear surface of the substrate, the third groove being opposite to the second groove of the front surface of the substrate, the third groove having a first contact and a second contact on two sides respectively, the third groove connecting to a fourth groove to expose the substrate, the fourth groove having a signal transmission line therein, and the signal transmission line having the signal feeding hole; and a capacitor electrically connecting to the first and second contacts, and being opposite to the second groove of the front surface of the substrate.