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摘要隐匿武器探测不管从军事应用还是民用都显得越来越重要，美国“9.11”事件发生后，恐怖主义在全世界人民心中造成了巨大阴影，所以安全检查在许多公共场合显得异常重要。利用被动毫米波成像技术来检查藏匿于人们衣服内的违禁物品(如枪支、匕首等),得到了人们的重视。从上世纪九十年代开始，国内外许多研究机构开展了被动毫米波成像用于隐匿违禁物品探测技术的研究。 本论文主要在黑体辐射原理基础上，介绍了微波辐射特性成像的基本理论和技术方法，用两种方法对隐藏在人体上的金属隐匿物品进行建模分析:建立了金属隐匿物品与人体之间室内外天线温度对比度的分析模型，详细讨论了在 Ka、W波段，室内外情况下的天线温度对比度与衣物透射率以及金属隐匿物品发射率之间的关系；又通过计算相干反射率的方法来对目标进行建模，并讨论了媒质层厚度与相干反射率的关系。 9883
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关键词 被动毫米波 安全检查 天线温度对比度 金属隐匿物品 发射率 透射率
相干反射率 Title MMW Radiation Characteristic Modeling and Analysis for
Security Inspection
Abstract
Concealed weapons detection, whether from military applications or civilian, has
become increasingly important. Terrorism has caused a huge shadow in the hearts of
people around the word since “911”incident. So the security check is extremely
important in many public places. Since the 1990s, the use of passive millimeter-wave
imaging technology to check for prohibited items (such as guns, daggers, etc.)hiding in
the clothes of people, has been the people’s attention. Many research institutions at
home and abroad had begun to carry out passive millimeter-wave imaging technology
used for conceal contraband goods detection.
In this paper, on the basis of the blackbody radiation theory, we introduced the basic
theory and techniques of microwave radiation characteristic imaging，and used two
methods to make a modeling analysis about the metal occult items hidden in the body:
we built a analysis model of antenna temperature contrast between the metal occult
items and the human body under the circumstances of indoor and outdoor, and
discussed in detail the relationship between antenna temperature contrast 、clothing
transmissivity and metal occult items emissivity under the circumstances of indoor and
outdoor in Ka-band and W-band; modeling of the target by calculating the coherent
reflectivity and discussed the relationship between the medium layer thickness and
coherent reflectivity.
Keywords: passive millimeter wave, security check, antenna temperature contrast,
metal conceal items , emissivity , transmittance, coherent reflectivity 目录
1 绪论 1
1.1课题背景 1
1.2被动毫米波成像技术理论及发展 2
1.3被动毫米波成像技术应用 3
1.4国内外研究现状 3
2 物体毫米波辐射理论 4
2.1物体的毫米波辐射特性 4
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