Patent ID: 8750947

Claim:
A mobile device, comprising: a ground plane; a grounding trace, defining a notch, wherein the grounding trace has a shorted end coupled to the ground plane; and a feeding trace, disposed adjacent to the grounding trace, and having a feeding end and an open end, wherein an antenna structure is formed by the grounding trace and the feeding trace, the feeding end of the feeding trace is coupled to a signal source, and the open end of the feeding trace substantially extends into the notch of the grounding trace, wherein a fundamental resonant mode of the grounding trace is excited to generate a low band, a high-order resonant mode of the grounding trace is excited to generate a first high band, and a resonant mode of the feeding trace is excited to generate a second high band, and wherein the grounding trace and the feeding trace have vertical projections on the ground plane, and the vertical projections at least partially overlap with the ground plane.