NQR DETECTION FROM CONTINUOUS RABI TRANSITIONS

摘要

Nuclear quadrupole resonance measurement using two or more wire loop(s) (306, 410) within a space to define a portal, and driving the wire loop(s) with a baseband digital transmitter generating a chirped or stepped signal, to create a corresponding varying electromagnetic field within the portal (300). Coherent emissions reflected thereby are detected through a directional coupler (504) feeding the transceiver. The detected coherent emissions are processed with a matched filter to determine presence of a target object within the portal.