METHOD AND APPARATUS FOR USING COLLIMATED AND LINEARLY POLARIZED MILLIMETER WAVE BEAMS AT BREWSTER'S ANGLE OF INCIDENCE IN GROUND PENETRATING RADAR TO DETECT OBJECTS LOCATED IN THE GROUND

摘要

A detection system comprises a transmitter unit, a receiver, and a processor. The transmitter unit is capable of transmitting a first collimated beam having a first frequency and a second collimated beam having a second frequency into a ground, wherein the first collimated beam and the second collimated beam overlap in the ground. The receiver is capable of monitoring for a response radio frequency signal having a frequency equal to a difference between the first frequency and the second frequency. The response radio frequency signal is generated by an object having non-linear conductive characteristics in response to receiving the first collimated beam and the second collimated beam. The processor is capable of controlling an operation of the transmitter unit and the receiver. The processor is connected to the transmitter unit and the receiver. The object is detected when the response radio frequency signal is detected by the receiver.