＂有源＂天线因其几何尺寸小,互耦低,可安装于多种平台,在工程上得到了广泛应用,但长期以来缺乏对其的定量分析。采用信道模型对某型接收系统进行建模,在不同噪声环境中,比较分析了＂有源＂天线和无源天线对系统灵敏度的影响,得到了一些有意义的分析结果。%Because of their small size and low mutual coupling,＂active＂ antennas are suitable to be installed on many platforms,so they are widely used in engineering.However,there is little quantitative analysis on them.In this paper,a typical receiver system with active/passive antennas is analyzed based on channel modeling method.Comparing to active antenna,passive antenna would result in different sensitivity of the receiver system.Finally,calculations are carried out on the receiver system in three type noise circumstances and some valuable results are obtained.
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