Patent ID: 6552686
Filing Date: 2003-04-22
Classification: H01Q

Abstract:
A multi-band radio antenna structure for use in a hand-held telecommunication device, comprising:a ground plane; a first planar radiating element formed of a first electrically conducting area having a first resonance frequency, wherein the first planar radiating element has a grounding point connected to the ground plane and a feed point for feeding adjacent to the grounding point, and wherein the first electrically conducting area is positioned adjacent to a first portion of the ground plane; a second planar radiating element formed of a second electrically conducting area having a second resonance frequency substantially lower than the first resonance frequency, wherein the second electrically conducting area has a grounding end connected to the first electrically conducting area adjacent to the grounding point of the first planar radiating element, and an open end surrounding at least two sides of the first electrically conducting area, leaving a gap between the second electrically conducting area and the surrounded sides of the first electrically conducting area, and wherein the second electrically conducting area is positioned adjacent to a second portion of the ground plane; and a third radiating element formed of a third electrically conducting area adjacent to the second planar radiating element having a third resonance frequency different from the first resonance frequency, wherein the third radiating element has a further grounding point different from the grounding point of the first planar radiating element, and wherein the third electrically conducting area is positioned adjacent to a third portion of the ground plane different from the first and second portions of the ground plane.