Guowei Lou

Nanjing University of Science and Technology, Nan-ching, Jiangsu Sheng, China

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Publications (9)5.76 Total impact

  • Guangfeng Zhang · Guowei Lou · Xingguo Li
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    ABSTRACT: Working all day and all weather, a passive millimeter wave radiometer (PMMW) can be widely used in civil and military affairs. It can get some specific information about the material characteristics different from radar and infrared detectors. On basis of the radiometric operating range equation, the radiation cross section and stealth effect of metal objects are presented for the PMMW near-sensing application. The measurement experiments of metal solid models adopts 3 mm band Dicke radiometer with the outdoor calibration system. The sky temperature and other different surface metal objects are also measured as the contrastive experiments. The results show the radiometric temperature contrasts of solid models have remarkable difference in the bare and coated conditions, and the radiometric operating range can decrease to 60.8 %. In addition, the PMMW stealth methods through different surface treatment respectively reduce the radiometric antenna temperature contrast in some degree.
    No preview · Article · Dec 2012 · Journal of infrared, millimeter and terahertz waves
  • Yexin Xing · Guowei Lou · Xingguo Li
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    ABSTRACT: Stealth technology has threatened the military defense systems, which makes it urgent to develop anti-stealth technology. Passive millimeter-wave detection using millimeter-wave radiometers is an attractive technology for detecting coating stealth aircrafts owing to its relative simplicity, reduced cost and covertness compared to radars. The millimeter-wave attenuation and sky brightness temperature were analyzed. The antenna temperature contrast of coating stealth plate was calculated, followed by a series of experiments. The calculation and experimental results show that the antenna temperature contrast of coating stealth air targets is affected little by the ground environment. The MMW radiometer can detect the coating target of 10 m × 20 m at height of 1 km. On the one hand, the antenna gain G 0 is increased and on the other hand, the sensitivity ΔT min is decreased in order to increase the detecting height H.
    No preview · Article · Feb 2012 · International Journal of Digital Content Technology and its Applications
  • Bing Gong · Guowei Lou · Xingguo Li
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    ABSTRACT: In the sub-millimeter wave propagation process, attenuation is mainly due to the effects of atmospheric particles, such as water vapor. It’s also caused by absorption and scattering by hydrometeors. This paper focuses on the effects of hydrometeors on sub-millimeter wave propagation. The formula for calculating the attenuation cross-section of raindrops is given, as well as the distance formula of sub-millimeter wave radiometers. Finally, this paper mentions the effects of some weather phenomena on detection distance of sub-millimeter wave radiometers. Taking cloud attenuation as an example, the relation between distance and temperature or moisture content is analyzed.
    No preview · Article · Nov 2009 · Journal of infrared, millimeter and terahertz waves
  • Bing Gong · Guowei Lou · Xingguo Li · Li Zhu
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    ABSTRACT: This paper put forward the distance equation for the SMMW radiometer based on the one for the MMW radiometer. In general case, the transmission attenuation was ignored as the detection distance of the radiometer was studied, because of the faint attenuation in some frequency band. But in the SMMW band, the effects of atmospheric attenuation were very significant. So the attenuation coefficient had been introduced into the distance equation. Then the solution of the equation was proposed by using the Lambert W, which is a transcendental function. Finally the simulation and analysis of the solution were given respectively.
    No preview · Conference Paper · Dec 2008
  • Xiang Shi · Guowei Lou · Xingguo Li
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    ABSTRACT: Passive Millimeter-Wave (MMW) detection has become a threat to ground targets. To enhance the survivability of the ground target in the future battlefield, passive MMW stealth technology is analyzed in this paper. Based on the passive MMW detection principle, computation and analysis are made for the MMW apparent temperature of tank in different actual combat conditions. The necessity of the passive MMW stealth is analyzed and the passive MMW stealth methods are also studied. © 2008 Science Press, Institute of Electronics, CAS and Springer-Verlag GmbH.
    No preview · Article · Jul 2008 · Journal of Electronics (China)
  • Xiang Shi · GuoWei Lou · XingGuo Li
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    ABSTRACT: Based on the analysis of the passive millimeter wave (MMW) radiometer detection, the ground target radiation cross section is modeled as the new token for the target MMW radiant characteristics. Its application and actual testing are discussed and analyzed. The essence of passive MMW stealth is target radiation cross section reduction.
    No preview · Article · Apr 2008 · Chinese Science Bulletin
  • Xiang Shi · Guowei Lou · Xingguo Li
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    ABSTRACT: Under actual threat of passive millimetre-wave (MMW) detection and guidance, to enhance survivability of ground target in future battlefield, MMW passive stealth technology research is conducted. Its necessity is analyzed and certified, and MMW passive detection distance is analyzed on the base of target radiation characteristic testing principle. The main direction for MMW passive stealth, the shape and the materials behavior control, are pointed out and the actual control methods are analyzed.
    No preview · Conference Paper · Oct 2006
  • Jinshui Jiang · Xingguo Li · Wen Wu · Guowei Lou
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    ABSTRACT: In this paper, a compact Ka-band microstrip integrated local-oscillator-mixer assembly used in projectile sensors is introduced. The overall configuration of microstrip circuit of this assembly is given. The functions of each component are described. The environment and reliability tests performed on this assembly were explored in detail, which include vibration, shock and temperature. The Ka-band local-oscillator-mixer assembly exhibits a 3.4-4.2 dB double side band (DSB) noise figure over a 2-GHz RF bandwidth. LO-to-RF isolation is greater than 27 dB over the range of operating frequencies. The frequency stability of the local oscillator with dielectric resonator used is less than 60 ppm/c<sup>0</sup>
    No preview · Conference Paper · Feb 2000
  • Wen Wu · Xingguo Li · Guowei Lou
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    ABSTRACT: The neural network model of a fin-line is established firstly and is combined with transmission line theory to develop a new analysis method of fin-line tapers in this paper. Since the simulation process of the neural network model is very fast, the analysis method of fin-line tapers developed is very effective and simple
    No preview · Conference Paper · Feb 2000