Patent ID: 8779992

Claim:
A planar antenna, comprising: a radiation portion; a shorting portion; a feeding portion connected to the radiation portion and the shorting portion, wherein the radiation portion and the shorting portion are in a bent shape; and a grounding surface, comprising a first lateral side and a second lateral side, wherein the first lateral side is connected to the shorting portion and the first lateral side and the second lateral side are orthogonally connected to form a rectangular region, so that the radiation portion, the shorting portion and the feeding portion are distributed in the rectangular region, and the rectangular region comprises a first sub rectangular region and a second sub rectangular region not overlapping each other, the shorting portion is continuously bent so as to be distributed in the first sub rectangular region, and the radiation portion is continuously bent so as to be distributed in the second sub rectangular region; wherein the radiation portion comprises: a first bending being the bending of the radiation portion farthest away from the feeding portion, wherein the vertical distance, that is measured along a straight line that is perpendicular to both the first bending and the feeding portion, from the first bending to the feeding portion is a first interval; and a second bending being the bending of the radiation portion nearest to the feeding portion, wherein the vertical distance, that is measured along a straight line that is perpendicular to both the second bending and the feeding portion, from the second bending to the feeding portion is a second interval; wherein the shorting portion comprises: a first shorting end connected to the first lateral side of the grounding surface, the second lateral side of the grounding surface is adjacent to the radiation portion, the vertical distance, that is measured along a straight line that is perpendicular to both the first lateral side and the feeding portion, from the first lateral side to the feeding portion is equal to a third interval, the vertical distance, that is measured along a straight line that is perpendicular to both the first bending and the second lateral side, from the first bending to the second lateral side is equal to a fourth interval, the vertical distance, that is measured along a straight line that is perpendicular to both the first shorting end and the second lateral side, from the first shorting end to the second lateral side is equal to a fifth interval, and the second interval, the fourth interval and the fifth interval are determined by the ratio of the third interval to the first interval; and a second shorting end connected to one end of the feeding portion.