Patent ID: 9099766
Filing Date: 2015-08-04
Classification: H01Q

Abstract:
1. An antenna structure, comprising: a ground plane; a feeding element, coupled to a signal source, wherein the feeding element substantially has a T-shape; a coupling radiation element, coupled to the ground plane, and disposed adjacent to the feeding element, wherein the coupling radiation element is separate from the feeding element and at least partially surrounds the feeding element; and an extension radiation element, coupled to the feeding element, wherein the extension radiation element has a meander structure; wherein the extension radiation element further comprises a rectangular widening portion, wherein one end of the extension radiation element is coupled to the feeding element, and wherein the rectangular widening portion is located at another end of the extension radiation element; wherein a width of the rectangular widening portion is much greater than a width of a meander line of the meander structure; wherein the coupling radiation element comprises a main portion and a shorting portion, and wherein the main portion is disposed adjacent to the feeding element and is coupled through the shorting portion to the ground plane; wherein the main portion of the coupling radiation element has a notch, and wherein at least one portion of the feeding element is located in the notch; wherein the notch substantially has a semicircular shape or an arc-shaped edge.