Patent ID: 7030833
Filing Date: 2006-04-18
Classification: H01Q

Abstract:
1. An antenna device comprising: a ground plane; a first radiation element; and a second radiation element, wherein the first radiation element is formed of a transmission line antenna including: a first end portion and a second end portion that are approximately perpendicular to the ground plane, the first end portion that functions as a current feeding point, the second end portion that is electrically connected to the ground plane; a first bend portion and a second bending portion; a first side portion and a second side portion that are linked with the first bending portion and the second bending portion, respectively, wherein the first side portion and the second side portion are approximately parallel with the ground plane and approximately parallel with each other; and a first turnup portion that is formed between the first side portion and the second side portion, wherein the second radiation element is formed of a transmission line antenna including: a first end portion and a second end portion of the second radiation element that are electrically connected to the ground plane and approximately perpendicular to the ground plane; a first bending portion and a second bending portion of the second radiation element; a first side portion and a second side portion of the second radiation element that are linked with the first bending portion and the second bending portion of the second radiation element, respectively, wherein the first side portion and the second side portion of the second radiation element are approximately parallel with the ground plane and approximately parallel with each other; and a second turnup portion that is formed between the first side portion and the second side portion of the second radiation element, wherein at least a part of the second radiation element is disposed within the first radiation element, wherein a first portion from the first end portion of the first radiation element to the first bending portion of the first radiation element is disposed with a first gap in approximately parallel with a first portion of the first end portion of the second radiation element to the first bending portion of the second radiation element, and wherein a second portion from the second end portion of the first radiation element is disposed with a second gap in approximately parallel with a second portion from the second end portion of the second radiation element to the second bending portion of the second radiation element.