Patent ID: 8436774
Filing Date: 2013-05-07
Classification: H01Q

Abstract:
1. A mobile communication device including a ground plane and an antenna disposed on a dielectric substrate, the antenna comprising: a radiating metal portion providing a resonant path for the antenna to generate a first operating band and a second operating band, wherein operating frequencies of the first operating band are lower than operating frequencies of the second operating band; a coupling metal portion coupled to the radiating metal portion to form a first coupling portion, wherein the coupling metal portion is electrically connected to a source through a connecting metal strip and the coupling metal portion capacitively couples electromagnetic energy to the radiating metal portion through the first coupling portion; and an inductive shorting metal portion having a length no less than one-half the length of the radiating metal portion, wherein one end of the inductive shorting metal portion is electrically connected to the radiating metal portion, another end of the inductive shorting metal portion is electrically connected to the ground plane, the inductive shorting metal portion includes a first fractional section coupled to the radiating metal portion to form a second coupling portion, and a second fractional section coupled to the coupling metal portion to form a third coupling portion, wherein a length of the coupling metal portion is no less than one-third of a length of the radiating metal portion.