Patent ID: 7071880

Claim:
An antenna structure, suitable for a dual-band operation, the antenna structure comprising: a substrate, having a first-side surface and a second-side surface; a first antenna substructure, disposed on the first-side surface, wherein the first antenna substructure comprises: a first straight metal line, wherein the straight metal line has one end as an external connection end, and another end as a radiating end; and a second straight metal line, joining to the first straight metal line at the radiating end, substantially perpendicular to the first straight metal line; and a second antenna substructure, disposed on the second-side surface, wherein the second antenna substructure comprises: a metal plate, serving as a ground plate, wherein the first straight metal line is overlapping with the metal plate; and a L-shape metal line, protruding from the metal plate, wherein a portion of the L-shape metal line is parallel and overlapping with the second straight metal line, and a portion of the L-shape metal line is parallel to the first straight metal line without overlapping.