Patent ID: 8669914

Claim:
A dual-band antenna, comprising: a first antenna for operating at a first frequency band and comprising: a first radiating portion comprising a plurality of separated radiating strips positioned on a first plane of a circuit board; a second radiating portion comprising a plurality of separated radiating strips positioned on a second plane of the circuit board; and a plurality of vias for coupling the plurality of radiating strips on the first plane with the plurality of radiating strips on the second plane to form a spiral radiating body; a second antenna for operating at a second frequency band and comprising a radiating plane coupled with the first radiating portion or the second radiating portion; a shorting element coupled with the radiating plane and shared by the first antenna and the second antenna; and a feeding element coupled with the radiating plane and shared by the first antenna and the second antenna; wherein the area of the radiating plane is greater than that of each of the radiating strips of the first and second radiating portions, and the width of part of the radiating plane gradually increases along a first direction.