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Development of Passive Millimeter-wave Security Screening System
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 Title & Authors
Development of Passive Millimeter-wave Security Screening System
Yoon, Jin-Seob; Jung, Kyung Kwon; Chae, Yeon-Sik;
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The designed and fabricated millimeter-wave security screening system receives radiation energy from an object and a human body. The imaging system consist of sixteen array antennas, sixteen four-stage LNAs, sixteen detectors, an infrared camera, a CCD camera, reflector, and a focusing lens. This system requires high sensitivity and wide bandwidth to detect the input thermal noise. The LNA module of the system has been measured to have 65.8 dB in average linear gain and 82 GHz~102 GHz in bandwidth to enhance the sensitivity for thermal noise, and to receive it over a wide bandwidth. The detector is used for direct current (DC) output translation of millimeter-wave signals with a zero bias Schottky diode. The lens and front-end of the millimeter-wave sensor are important in the system to detect the input thermal noise signal. The frequency range in the receiving sensitivity of the detectors was 350 to 400 mV/mW at 0 dBm (1 mW) input power. The developed W-band imaging system is effective for detecting and identifying concealed objects such as metal or plastic.
passive millimeter-wave imaging;concealed object;scanning reflector;millimeter-wave lens;
 Cited by
Kyung Kwon Jung, Yeon Sik Chae, and Jin Koo Rhee, "Studies on the Millimeter-wave Passive Imaging Sensor," Journal of the Institute of Electronics and Information Engineers, Vol. 45-SC, No. 2, pp. 1-7, March 2008.

M. Shoucri, R. Davidheiser, B. Hauss, P. Lee, M. Mussetto, S. Young, L. Yujiri, "A passive millimeter wave camera for aircraft landing in low visibility conditions," IEEE Aerospace and Electronic Systems Magazine, Volume 10, Issue 5, pp. 37-42, May 1995.

L. Yujiri, M. Shoucri, P. Moffa, "Passive millimeter wave imaging," IEEE Microwave Magazine, Volume 4, Issue 3, pp. 39-50, Sep. 2003. crossref(new window)

Hyun-Jun Lim, Yeon-Sik Chae, Kyung-Kwon Jung, Mi-Ra Kim, and Jin-Koo Rhee, "Study Of Millimeter-Wave Passive Imaging Sensor Using the Horn Array Antenna," Journal of the Institute of Electronics and Information Engineers, Vol. 47-TC, No 2, pp. 67-73, Feb. 2010.

G. S. Dow, D. C. W. Lo, Y. Guo, E. W. Lin, T. T. Chung, M. D. Biedenbender, O. Miromontes, A. Marashi, L. Yujiri, P. S. C. Lee, M. M. Shoucri, B. R. Allen, "Large scale W-band focal plane array for passive radiometric imaging," IEEE MTT-S International Microwave Symposium Digest, Volume 1, pp. 369-372, 1996.