典型金属立体目标的毫米波辐射特性研究

Research on MMW Radiation Characteristic of Typical Mental Targets

针对规则金属立体目标的毫米波辐射特性数据库不完善的问题,对金属球、金属柱和金属立方体3种典型目标分别进行3mm和8mm 2个波段辐射特性研究,并对比分析不同结构对目标毫米波辐射特性的影响;通过理论计算金属平面目标天线温度对比度,利用面元法推导出天线主波束范围内的金属立体目标表面的视在温度;在此基础上使用辐射计对不同金属立体目标进行实际的测量,分析了造成视在温度差异的原因;实验丰富了金属立体目标的毫米波辐射特性数据库,为典型金属立体目标成像和目标识别提供准确有效的数据支持。

Aim at solving the problem of the imperfect database of millimeter-wave radiation characteristics of regular metal stereoscopic targets,the radiation characteristics of three typical targets,such as metal spheres,metal columns and metal cubes,were studied.The effects of different structures on the MMW radiation characteristics of targets were compared and analyzed.The temperature contrast of the metal plane target antenna is calculated theoretically,and the apparent temperature of the surface of the metal stereo target within the main beam range of the antenna is deduced using the face element method.Based on this,using radiometers to make actual measurements of different metallic stereo targets,the causes of apparent temperature differences were analyzed.The experiment enriches the millimeter-wave radiation characteristics database of metallic stereo targets,providing accurate and effective data support for typical metal stereoscopic target imaging and target recognition.