Patent ID: 7724191
Filing Date: 2010-05-25
Classification: G01S

Abstract:
1. An apparatus for tracing position and direction of a target object through a radio frequency (RF) signal, the apparatus comprising: an antenna rotating to receive an RF signal transmitted from the target object; and a position and direction determination part calculating an intensity of the received RF signal and determining that the target object is placed in front of the antenna when the RF signal intensity reaches the maximum, wherein the antenna is a plate-shaped loop antenna, wherein the position and direction determination part calculates the received RF signal intensity V according to Equation below. where C, S, and B represent a constant of a loop antenna, the size of the loop antenna, and electric flux density of an RF signal passing through the loop antenna, respectively, and θx represents an angle between an x-axis of the loop antenna and a transmission direction of the RF signal.