Patent ID: 8884836

Claim:
A multi band internal antenna comprising: a board; an impedance matching/feeding part formed on the board; and a first radiation element joined to and being coplanar with the impedance matching/feeding part, wherein the impedance matching/feeding part comprises: first matching element having a particular length, one end of the first matching element being coupled to a ground and the other end is open end, and a second matching element having a particular length and arranged with a distance from the first matching element, the second matching element electrically coupled to a feeding point, and wherein one end of the first radiation element is coupled to the other end of the first matching element and the other end of the first radiation element is open, and both the first matching element and the second matching element comprise a plurality of coupling elements protruding perpendicularly from the first matching element and the second matching element to form a generally comb-like shape, and wherein the first radiation element extends from the first matching element at a starting point, the first radiation element extending away from and being coplanar with the second matching element, and wherein the second matching element terminates at the open end wherein a distance from the starting point to the open end is shorter than a distance from the starting point to any of the other points on the second matching element.