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Proceedings Paper

Ultra-short electromagnetic pulse used for target detection
Author(s): Chi Ruan; Wei Zhao; Guo-Fu Chen; Bai-Yu Liu; Shao-Lan Zhu
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Paper Abstract

Two common approaches to generate ultra-short electromagnetic pulse are presented in this paper. One is that using a high-speed avalanche transistor and another is that using a laser triggering photoconductive semiconductor switch (PCSS). An ultra-short electromagnetic pulse with the rise time of 190 picosecond (ps), the pulse duration of 290 ps and the amplitude of 2.2 kV, is radiated by an ultra-wide band (UWB) antenna. It is noted that the ultra-wide frequency spectrum provided by the ultra-short electromagnetic pulses with duration of picosecond can be used to distinguish different targets. The radiated pulse would transmit and be reflected by various targets within the detection range. By analyzing the reflected signal, the corresponding reflection material can be discerned. The experiment is set up to distinguish the iron metal and concrete wall respectively. The results show that such ultra-short pulse technology has an excellent ability to distinguish objects.

Paper Details

Date Published: 29 January 2007
PDF: 6 pages
Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 62795L (29 January 2007); doi: 10.1117/12.725439
Show Author Affiliations
Chi Ruan, Xi'an Institute of Optics and Precision Mechanics (China)
Wei Zhao, Xi'an Institute of Optics and Precision Mechanics (China)
Guo-Fu Chen, Xi'an Institute of Optics and Precision Mechanics (China)
Bai-Yu Liu, Xi'an Institute of Optics and Precision Mechanics (China)
Shao-Lan Zhu, Xi'an Institute of Optics and Precision Mechanics (China)


Published in SPIE Proceedings Vol. 6279:
27th International Congress on High-Speed Photography and Photonics

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