Patent ID: 7626551

Claim:
A multi-band planar inverted-F antenna, comprising: a radiating unit comprising a common radiating element, a high-frequency (HF) radiating element and a low-frequency (LF) radiating element, a quasi U-shaped slot defined between the HF radiating element and the LF radiating element, a round through hole defined at a junction between the HF radiating element and the common radiating element, an L-shaped slot communicated with the round through hole; a ground unit electrically connected to one side of the radiating unit; and a feeding unit comprising a strip electrically connected to one side of the HF radiating element; wherein the ground unit comprises a ground point and an inverted-L short-line, one end of the inverted-L short-line is connected to the ground point and another end of the inverted-L short-line is connected to the common radiating element such that the inverted-L short-line is electrically connected between the ground point and the feeding unit.