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Proceedings Paper

Passive millimeter-wave camera images: current and future
Author(s): Lee Mirth; Al Pergande; Dayton D. Eden; Lawrence Y. Chu
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Paper Abstract

Rapidly improving technology is transitioning current laboratory images into reality with fielded systems expected within two years. W-band radiometers have been shown to be effective in detecting metallic and nonmetallic weapons concealed under heavy garments in both outdoor and indoor situations. Systems that are in development will provide real-time display and weapon detection in controlled situations. The incorporation of technology improvements that have already been demonstrated will double the sensitivity and provide affordable systems with rapid scanning for general use. Lockheed Martin and Intelligent Machine Technology are working to build a demonstration system for the Department of Justice and the Air Force Research Laboratory that can be extended to take advantage of rapidly moving semiconductor improvements. Our current radiometer modules use a PIN switch for the Dicke calibration function followed by multiple low noise amplifier stages, a Schottky detector and a video amplifier. Sensitivity of such modules if primarily a function of the insertion loss and noise figure of the front end MMEC circuits. Processing improvements at Lockheed Martin and refined chip design will result in a 3-db improvement in the effective noise figure within the next year. Imaging is also greatly improved by achieving greater effective bandwidth and higher operating frequency. Whereas present modules operate from 80 to 90 G Hz, MMEC improvements will provide for operation up to 140G Hz with a doubling of the bandwidth in the near term. Receiver operation up to 540G Hz has also been demonstrated at other labs.

Paper Details

Date Published: 7 January 1999
PDF: 9 pages
Proc. SPIE 3577, Sensors, C3I, Information, and Training Technologies for Law Enforcement, (7 January 1999); doi: 10.1117/12.336976
Show Author Affiliations
Lee Mirth, Lockheed Martin Electronics & Missiles (United States)
Al Pergande, Lockheed Martin Electronics & Missiles (United States)
Dayton D. Eden, Intelligent Machine Technology Corp. (United States)
Lawrence Y. Chu, Sanders, A Lockheed Martin Co. (United States)

Published in SPIE Proceedings Vol. 3577:
Sensors, C3I, Information, and Training Technologies for Law Enforcement
Edward M. Carapezza; David B. Law, Editor(s)

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