Patent ID: 7271770
Filing Date: 2007-09-18
Classification: H01Q

Abstract:
1. A reverse F-shaped antenna formed on a surface of a printed board, said antenna comprising: a grounding element; a radiating element located at a position opposed to the grounding element; a short circuit conductor operable to connect the grounding element to the radiating element; and a feeder operable to feed power to the radiating element; wherein the radiating element includes a first radiating conductor, a second radiating conductor, and at least one conducting device having a helical structure, the first radiating conductor having a first end connected to the short circuit conductor and a second end connected to the feeder, the second radiating conductor being positioned away from the first radiating conductor by a predetermined distance along an extension from the second end of the first radiating conductor, the at least one conducting device being positioned between the first and second radiating conductors to electrically connect the first radiating conductor to the second radiating conductor, and the second radiating conductor including a first sub-part positioned relatively close to the first radiating conductor, and a second sub-part positioned farther from the first radiating conductor than the first sub-part, the first sub-part having a width and the second sub-part having a width which is larger than the width of the first sub-part.