Patent ID: 8482464

Claim:
A mobile communication device comprising: a ground plane; a dielectric substrate; and an antenna having a first operating band and a second operating band, with the antenna disposed on the dielectric substrate and comprising: a radiating portion comprising: a first radiating portion having a first open end, a second open end, and at least one bend; and a second radiating portion comprising a shunt metal strip with both ends of the shunt metal strip electrically connected to the first radiating portion respectively, wherein the second radiating portion forms a closed loop with a segment of the first radiating portion, with the second radiating portion having a length substantially equal to half of a total length of the closed loop, wherein the closed loop has the total length greater than four-tenths of a length of the first radiating portion; a feeding portion disposed between the ground plane and the first open end of the first radiating portion and coupling electromagnetic energy to the radiating portion through a coupling gap, with one end of the feeding portion being an antenna's feeding point; and a shorting portion having one end electrically connected to the radiating portion and another end electrically connected to the ground plane, wherein the one end of the shorting portion does not directly connect to the closed loop and is disposed between the closed loop and the first open end of the first radiating portion.