电磁辐射骚扰的新测试原理探索与分析

针对欧美辐射骚扰测试不能测得最大辐射骚扰场强的问题,结合实验室实际情况,提出一种新的测试原理.该原理利用测试天线的方向图特征,建立起适当的数学模型.借助天线方向图中的三角函数关系得到修正因子.最后,在电波暗室中,采用俯仰天线和非俯仰天线对新测试原理进行验证,证明该原理可以将辐射骚扰场强测试数据提高0~2 d B,使测试结果更接近最大值,提高了测试准确度.

The exploration on the new principles of electromagnetic radiated emissions

Based on the principles of European and America standards, this article proposed a new test principles of radiated emission, on account of the inaccuracy from the traditional principles. It is proved to be useful for the cost cutting and raise the accuracy of test. By means of the characteristics of antenna field pattern, the article models the principles and calculates the correction factor using the trigonometric function relationship. At last, the results show the practicability of the new principle from the test data using the tilt antenna mast and the un-tilt antenna mast respectively. The methods can improve the precision up to 2dB, which provides new ideas and supplements for the test principles of radiated emission.