摘要
针对使用吸收钳测量法(ACMM)进行骚扰功率测量的有效性问题,分析了ACMM的测量原理,建立理论数学模型,通过数学模型分别计算ACMM和更符合实际情况的场强测量法的理论值,并模拟现实情形分别按这两种方法进行测试,将结果进行对比分析。结果表明:ACMM只有在特定情形下才是有效的,但在不同的走线方式、馈线长度、存在内部射频骚扰回路等情形下与场强测量法的偏差较大。因此应考虑逐步取代ACMM,最终转而采用场强测量法。
For the effectiveness of disturbance power measurement by using absorbing clamp measurement method（ACMM）,the principle of ACMM is analyzed by establishing a theoretical model and calculating the theoretical values separately for ACMM and field strength measurement method.According to these two methods separately,the measurements were carried out to simulate realistic circumstances.Through comparing the results from these two tests,it can be observed that ACMM is only valid for the particular circumstance,and the measurement deviation between these two methods is caused by different cable routings and lengths of EUT,or caused by existing an RF disturbance circuit inside.Therefore,it must be considered that ACMM should be substituted by field strength measurement method gradually.
关键词
骚扰功率
吸收钳测量法
辐射发射
辐射骚扰场强
场强测量法
偏差
替代
disturbance power
ACMM
radiated emission
radiated disturbance field strength
field strength measurement method
deviation
substitution
