Patent ID: 7123207

Claim:
A printed antenna having a dielectric substrate and a pair of printed antenna elements on the substrate comprising: antenna elements being set separately and adjacently each other on a substrate; an xy axis system being defined on an antenna plane so that the origin is defined at a center of location of the antenna elements, an x axis is set in a direction that the antenna elements are arranged, and a y axis is set in a direction perpendicular to the x axis; a size of the antenna elements in the direction of the y axis becoming gradually larger according to the x axis changing in an outer direction; and each of the antenna elements comprising an impedance matching part at a feeding side of the antenna elements which is narrowed step by step from the antenna element side to the feeding side of the printed antenna, wherein the Voltage Standing Wave Ratio (VSWR) characteristic of the antenna is less than 3 in a frequency range of between 3.1 GHz to 10.6 GHz.