| CPC H01Q 9/0414 (2013.01) [H01Q 9/0421 (2013.01)] | 20 Claims |

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1. An antenna structure, comprising:
a feeding radiation element, having a feeding point;
a first radiation element, coupled to the feeding radiation element;
a second radiation element, coupled to the feeding radiation element, wherein the second radiation element and the first radiation element substantially extend in opposite directions;
a first coupling branch, coupled to a first grounding point on a ground element, and extending across the first radiation element, wherein the first coupling branch comprises a first coil portion and a first connection portion; and
a dielectric substrate, having a first surface and a second surface opposite to each other, wherein the feeding radiation element, the first radiation element, the second radiation element, and the first connection portion of the first coupling branch are distributed over the first surface of the dielectric substrate, and the first coil portion of the first coupling branch is distributed over the second surface of the dielectric substrate.
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