Patent ID: 9502769
Filing Date: 2016-11-22
CPC Classification: H01Q

Claim Text:
1. A multiband switchable antenna structure, comprising: a feeding element, wherein a first end of the feeding element is a feeding point; a first radiation element, wherein a first end of the first radiation element is coupled to a second end of the feeding element, and a second end of the first radiation element is open; a second radiation element, wherein a first end of the second radiation element is coupled to the second end of the feeding element; a plurality of circuit branches, having different impedance values; a switch circuit, selecting one of the circuit branches as a matching branch according to a control signal, wherein a second end of the second radiation element is coupled through the matching branch to a ground voltage; and a third radiation element, wherein a first end of the third radiation element is the feeding point, and a second end of the third radiation element is open and adjacent to the feeding point; wherein the third radiation element substantially has a C-shape, and the feeding point is positioned between the second end of the third radiation element and the second end of the second radiation element.