Patent ID: 7864107
Filing Date: 2011-01-04
Classification: G01S

Abstract:
1. A radio frequency (RF) receiver detection and locating system, comprising: a) a transmitter for emitting a high power illuminating signal at a predetermined receive frequency of a target RF receiver to be detected, said high power being sufficient to cause the target RF receiver to generate harmonic emissions; b) at least one detection system receiver configured to detect at least one harmonic frequency emitted by the target RF receiver; c) a modulated signal source operatively associated with said transmitter to modulate said illuminating signal and for use as a reference to said at least one detection system receiver such that the turn around time of said at least one harmonic frequency emitted by the target RF receiver can be measured; d) a directional receive antenna operatively associated with said at least one detection system receiver for determining the angle to said target RF receiver; and, e) a target RF receiver database for receiving an output of said at least one detection system receiver, said target RF receiver database including compiled information that characterizes potential target RF receivers, thus providing said predetermined receive frequency, wherein said at least one detection system receiver receives data to determine if there is a change in the environmental signature of an area for determining the presence of a target RF receiver by comparing the received data to data received in a previous scan of said area.