高功率微波辐射场功率密度测量不确定度分析方法

辐射场测量是检验高功率微波系统输出指标的重要手段.随着高功率微波测量技术的发展，辐射场测量系统的稳定性和可靠性不断提高，作为完整测量结果重要组成部分的测量不确定度越来越受到关注.文章介绍了高功率微波辐射场功率密度测量方法及系统组成，建立了功率密度测量的数学模型，给出了高功率微波辐射场功率密度测量的主要不确定度来源.对检波器输入功率计算、接收天线有效面积校准、衰减环节校准及测量系统各环节连接失配等测量不确定度分量进行了分析，并给出了高功率微波辐射场功率密度测量不确定度的合成方法.本文给出的测量不确定度分析方法较为科学、操作性强，对完善高功率微波辐射场功率密度测量结果具有一定的指导意义.

Measurement uncertainty on power density of high power microwave radiation

Radiation field measurement is an important means of testing the output index of high power microwave systems.With the development of high power microwave measurement technology,the stability and reliability of measurement system has been improved continuously,and measurement uncertainty as an important part of the complete results is getting more attention.The methods for measuring the radiated power density of high power microwave and system composition is introduced in this paper.The mathematical model of power density measurement is set up and the main source of measurement uncertainty is proposed.Measurement uncertainty components such as calculation of the input power of detector,calibration of the effective area of receiving antenna,calibration of the attenuation departments and mismatch of the complicated measurement system with multiple devices are analyzed.The combined method of measurement uncertainty on power density of high power microwave radiation is also presented.The presented combined uncertainty method is with scientific and practical values,and can improve the measurement results.