暗室墙面反射对雷达告警系统测向的影响

Analysis of radar warning system direction-finding under wall reflection influence

摘要:

微波暗室为电磁波的定性分析或定量测试提供一个近似无反射的环境，当微波暗室内存在的反射不能忽略时，暗室墙面反射引起的多路径传输就会影响对测试结果的评定。在阐述比幅单脉冲测向原理的基础上，研究了由于暗室静区反射电平对雷达告警系统测向精确度的影响，建立了暗室静区反射电平与雷达告警接收机测向误差的关系模型，并且结合四元阵、八元阵、十六元阵说明了静区反射电平、来波方向与测向误差范围的关系。

Abstract:

Anechoic chamber provides an approximate reflection-free environment for qualitative analysis or quantitative test of electromagnetic waves. The multipath transmission raised by wall reflection of anechoic chamber will affect the assessment on the test results when the reflection in the anechoic chamber can’t be ignored. Based on the principle of single pulse direction-finding by comparing amplitude，the influence of reflection level in quiet zone of the chamber on the direction-finding accuracy of radar warning system is studied，the model of the relationship between reflection level in quiet zone of the chamber and the direction finding error of radar warning receiver is established. The relationship among reflection level in quiet zone，wave direction and the margin of direction-finding error are explained by combining four array elements，eight array elements and sixteen array elements.