Patent ID: 8314737
Filing Date: 2012-11-20
Classification: H01Q

Abstract:
1. An antenna device comprising: a feeding element connected to receive RF power from a feeding point on a circuit board; and a non-feeding element arranged such that a gap is provided between the non-feeding element and the feeding element, the non-feeding element and the feeding element being configured so as to be in proximity and capacitively coupled to one another to thereby generate a resonant state; wherein the non-feeding element is arranged so as to resonate at a frequency different from a resonant frequency of the feeding element, and the feeding element and the non-feeding element are provided adjacent to the circuit board with the feeding element connected to the feeding point on the circuit board; the feeding element and the non-feeding element are both arranged with a spacing from an edge surface at one end of a ground surface provided on the circuit board and to extend in a direction along the edge surface at the one end of the ground surface, and portions of the feeding element and the non-feeding element are arranged so as to extend in the direction along the edge surface at the one end of the ground surface to define alongside-ground-terminal extending portions; the feeding element includes a contiguous electrode portion extending non-linearly from one end of the alongside-ground-terminal extending portion of the feeding element towards the feeding point of the circuit board; the non-feeding element includes a first open end and a second open end each having a three-dimensional shape; the feeding element includes an open end; one of the first and second open ends of the non-feeding element is adjacent to and capacitively coupled with the open end of the feeding element; and the alongside-ground-terminal extending portion of the feeding element and the alongside-ground-terminal extending portion of the non-feeding element are arranged in substantially the same plane that is substantially parallel to a thickness direction of the circuit board.