Patent ID: 7173567
Filing Date: 2007-02-06
Classification: H01Q

Abstract:
1. An antenna for receiving a current, comprising: a flat-plate ground plane; a first antenna element with its one end connected to a feeding point and its intermediate portion folded by a plurality of times, which is extended upward from said ground plane; and a second antenna element with its one end connected to the other end of said first antenna element and with the other end thereof connected to said ground plane, which has an intermediate portion extended upward from said ground plane, and wherein said first and second antenna elements each have an electrical length of over ¼ wavelength relative to a frequency band of said current, a substrate extended upward from said ground plane, wherein the intermediate portion of said second antenna element is disposed in a symmetrical relation with the intermediate portion of said first antenna element, wherein the intermediate portion of said first antenna element and the intermediate portion of said second antenna element are arranged symmetrically opposed to each other, wherein the intermediate portion of said first antenna element is arranged on one surface of said substrate, and the intermediate portion of said second antenna element is arranged on the other surface opposed to the substrate surface where the intermediate portion of said first antenna element is disposed.