Patent ID: 7423580
Filing Date: 2008-09-09
Classification: G01S

Abstract:
1. An RF system for finding a target T in three dimensional space, comprising: a slave unit disposed on the target T, said slave unit configured as a transponder; a monitoring unit configured as a transceiver for monitoring the location of the target T; a wireless communication system, said wireless communication system operating on a Radio Frequency (RF) bandwidth configured to allow communication between said slave and monitoring units, said monitoring unit configured to transmit a ranging signal to said slave unit, said slave unit responding to said ranging signal by transmitting a reply ranging signal, said wireless communication system further comprising: a processor for determining position information of the target T, said processor in communication with an antenna, said processor being configured to repeatedly determine values for said position information from: and means for generating a measured distance between units in three dimensional space, said distance generating means determining said measured distance of the target T by a spherical virtual triangulation relationship when successive values of said position information has a predetermined logical relationship relative to said previous values between said monitoring unit and slave unit.