Patent ID: 8022888
Filing Date: 2011-09-20
Classification: H01P,H01Q

Abstract:
1. An antenna device, comprising: a substrate; a ground plane disposed on one surface of the substrate; a feed line disposed on the other surface of the substrate; a first radiator including: a second radiator spaced apart from the first radiator at a predetermined distance and including: a phase shifter diverging from the feed line and connected to the second feed terminal for supplying a second feed signal to the second radiator, the second feed signal having a predetermined phase difference with the first feed signal, wherein a first current path is formed in at least one side of the ground plane by a current flowing through the first radiator, wherein a second current path is formed in the at least one side of the ground plane by a current flowing through the second radiator, and wherein the first and second radiators are arranged such that a loop antenna providing one current path is formed by capacitive coupling between the first radiator and the second radiator to cause the currents in the first current path and the second current path to cancel each other.