Patent ID: 9170311
Filing Date: 2015-10-27
Classification: G01N,G01R

Abstract:
1. A system comprising: a portal including at least three conductive surfaces including a pair of left and right opposing side walls and a roof disposed between the left and right side walls to define a portal space; a radio frequency chirp transmitter, to emit a time varying electromagnetic field that includes a chirp signal into the portal space; a radio frequency chirp receiver for detecting coherent emissions from materials disposed within the portal space that are responsive to the time varying electromagnetic field; a transmit radiator structure coupled to the chirp transmitter and further comprising a conductor running along, inside of, and adjacent to the left side, roof, and right side of the portal; and a receive radiator structure coupled to the radio frequency chirp receiver, the receive radiator structure disposed within the portal and separate from the transmit radiator structure.