摘要
针对电场传感器在1 GHz以上频段高于200 V/m场强的校准需求,提出了等效天线系数法。该方法借用了天线系数的概念,在混响室中首先通过现有场强标准装置传递得到小场强时接收天线的等效天线系数,再利用等效天线系数对混响室中的大场强定标,从而实现电场传感器的大场强校准。混响室中采用等效天线系数法定标的大场强与采用统计方法计算得到的大场强相比较,场强偏差满足系统不确定度要求,说明了等效天线系数法的合理性。该方法借助混响室的特点和天线系数概念,将电场传感器校准幅度提升至200 V/m以上,为大场强测量的准确性提供了依据。
For calibration requirement of E-field probe with field strength higher than 200 V/m in frequency band above 1GHz,equivalent antenna factor method is presented.The method uses the concept of antenna factor.The equivalent antenna coefficient of the receiving antenna is obtained at small field strength in reverberation chamber from field strength standard.And then accurate results at high field strength could be obtained by the equivalent antenna coefficient.Compared with field strength calculated by statistical method,deviation is small enough that explains the method is effectively.The method uses the characteristics of reverberation chamber and the concept of antenna coefficient,increases the level of E-field probe calibration above 200 V/m and provides a basis for the accuracy of measuring large field strength.
作者
齐万泉
何贝琛
王凇宇
Qi Wanquan;He Beichen;Wang Songyu
出处
《安全与电磁兼容》
2021年第5期56-58,78,共4页
Safety & EMC
关键词
混响室
电场传感器
校准
reverberation chamber
E-field probe
calibration
