The detecting data for millimeter wave (MMW) characteristics of metal target on water surface are in the state of deficient .Aiming at this problem ,a method on detecting the radiation characteristics of 3 mm and 8 mm metal target on water surface was proposed .The antenna temperature contrast of metal plane target was theoretically analyzed and simulated firstly ,and then the propagation of metal ball was analyzed .On this basis , the different targets on water surface were detected with 3 mm and 8 mm radiometers .The comparison between detection and simulation results showed that the apparent temperature of metal target and water differs between 20 K and 32 K ,which meant that the MMW radiometer could effectively identify the metal target on water surface .%针对水面金属目标毫米波辐射特性数据库缺乏的问题,提出了3 mm与8 mm波段水面金属目标的辐射特性检测方法.该方法首先对水面金属平面目标的天线温度对比度进行了理论分析与仿真,同时分析了水面金属球的辐射情况,在此基础上采用3 mm和8 mm两个波段的辐射计对水面不同目标进行了测量.实验及仿真结果对比表明,金属目标与水面的视在温度相差20~32 K,毫米波辐射计能够有效地检测水面金属目标.
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