Simplified Reflection Models of Representative Ground Metal Target in Millimeter Wave Passive Surveillance  

作　　者：WENG Xiaodi LU Xuliang TIAN Yu SUI Mingxu LI Yupeng 

机构地区：[1]Key Laboratory of Science and Technology on Electromagnetic Environmental Effects and Electro-optical Engineering, PLA University of Science and Technology, Nanjing 210007, China [2]Jiangsu Key Laboratory of Spectral Imaging & Intelligent Sense, Nanjing University of Science and Technology, Nanjing 210094, China [3]School of Computer Science, National University of Defense Technology, Changsha 410073, China

出　　处：《高电压技术》2013年第10期2409-2414,共6页High Voltage Engineering

基　　金：supported by Jiangsu Key laboratory of Spectral Imaging&Intelligent Sense(Nanjing University of Science and Technology)(30920130122XXX)

摘　　要：For designing camouflage of ground metal target against millimeter wave(MMW) passive detections,based on the radiation and reflection theories related to MMW passive detection and an assumption of high frequency approximation,simplified models of two kinds of ground metal targets are established.Analysis indicates that the reflection from ground is the leading factor on a ground metal target's radiant temperature.In an 8-mm imaging experiment,the uneven distribution of radiant temperatures in horizontal and vertical metal plates is directly perceived.In a radiometer experiment,two positions of a radiometer device are utilized to obtain the radiant temperatures of a horizontal metal in two different grounds(made of asphalt and metal net respectively),which are 295.41 K and 301.55 K,respectively.The experimental results are close to the analytical results calculated from the proposed simplified models,which are 306 K and 296 K,respectively.According to the simplified models,different parts of a vertical plate receive incident MMW of different angles from the asphalt background.The radiant temperature of a vertical metal plate obtained from a radiometer experiment at night is 307 K,and it is in coherent with 304.22 K,the result from calculation using the simplified model of vertical plate.Both the analytic results and the experimental results agree with the uneven distribution of radiant temperature.For designing camouflage of ground metal target against millimeter wave（MMW） passive detections, based on the radiation and reflection theories related to MMW passive detection and an assumption of high frequency approximation, simplified models of two kinds of ground metal targets are established. Analysis indicates that the reflection from ground is the leading factor on a ground metal target＇s ra- diant temperature. In an 8-mm imaging experiment, the uneven distribution of radiant temperatures in horizontal and vertical metal plates is directly perceived. In a radiometer experiment, two positions of a radiometer device are utilized to obtain the radiant temperatures of a ho- rizontal metal in two diflbrent grounds （made of asphalt and metal net respectively）, which are 295.41 K and 301.55 K, respectively. The experimental results are close to the analytical results calculated from the proposed simplified models, which are 306 K and 296 K, respec- tively. According to the simplified models, different parts of a vertical plate receive incident MMW of different angles from the asphalt background. The radiant temperature of a vertical metal plate obtained from a radiometer experiment at night is 307 K, and it is in coherent with 304.22 K, the result from calculation using the simplified model of vertical plate. Both the analytic results and the experimental results agree with the uneven distribution of radiant temperature.

关 键 词：金属目标 毫米波 模型 辐射温度 成像实验 不均匀分布 地面反射 垂直方向 

分 类 号：TN820[电子电信—信息与通信工程] TN015