NQR DETECTION FROM CONTINUOUS RABI TRANSITIONS

摘要

Nuclear quadrupole resonance measurement using two or more wire loop(s) 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. Coherent emissions reflected thereby are detected through a directional coupler feeding the transceiver. The detected coherent emissions are processed with a matched filter to determine presence of a target object within the portal.

主权项

1. A method for detecting a substance comprising:
disposing at least one conductive surface to define a space; disposing two or more wire loops within the space adjacent the conductive surface; driving the wire loops with a baseband chirped or stepped radio frequency transmitter through a directional coupler to create a time varying electromagnetic field within the space, the time varying electromagnetic field stimulating continuous transitions between two power states in the nucleus of the substance; receiving resulting coherent radio frequency emissions from the substance through the same directional coupler through which the transmitter is coupled; and processing the coherent emissions to determine characteristics of the substance.