Patent ID: 7705788

Claim:
A multi-band antenna adapted for used in a portable electronic device, comprising: a PCB having a first surface and an opposite second surface and defining a through hole extending from the first surface to the second surface; a first antenna body formed on the first surface of the PCB, the first antenna body comprising a fist radiating element operating at lower frequency and a first grounding element apart from the first radiating element; and a second antenna body formed on the second surface of the PCB, the second antenna body comprising a second radiating element operating at higher frequency, a second grounding element, and a connecting element connecting the second radiating element and the second grounding element; and a feeding line comprising an inner conductor electrically connecting to at least one of the first radiating element and the second radiating element and an outer conductor electrically connecting to at least one of the first grounding element and the second grounding element; wherein the first radiating element and the second radiating element electrically connect with each other via the through hole of the PCB, the first radiating element, the first grounding element, and the feeding line together compose a monopole antenna.