Patent ID: 8207895

Claim:
A shorted monopole antenna comprising: a dielectric substrate; a ground plane disposed on a portion of the dielectric substrate; a radiating portion disposed on the dielectric substrate, wherein the radiating portion does not overlap with the ground plane, and the radiating portion comprises: a first metal portion bent to form two adjacent coupling metal portions with a coupling gap, wherein the coupling gap is less than 2 mm, and a length of the first metal portion is larger than one-eighth wavelength of a central frequency of the antenna's lower band; and a second metal portion, the second metal portion having a first end electrically connected to the first metal portion, and a second end being open-ended; a feeding portion disposed on the dielectric substrate, without overlapping with the ground plane, the feeding portion having a first end electrically connected to the first metal portion, and a second end being an antenna feeding point; a shorting portion disposed on the dielectric substrate, wherein the shorting portion does not overlap with the ground plane, the shorting portion has a first end electrically connected to the first metal portion, and a second end electrically connected to the ground plane; and a capacitive element disposed on the dielectric substrate, the capacitive element overlapping with the ground plane and having a first end electrically connected to the antenna feeding point, and a second end electrically connected to a source.