摘要
针对频域法测量脉冲调制辐射场受到分辨率带宽制约的现状,提出了基于均方根值检波进行测量和修正的方法。首先明确了测量原理,定义了均方根值检波下场强修正系数;接着对功率测量结果和场强修正系数进行理论建模,提出并采用功率因子进行表征,并给出了功率因子具体值,完成了场强修正系数的计算;然后讨论了分辨率带宽和驻留时间的优选方法,简化了修正方法且精确控制了偏差;最后开展了实验验证。实验数据表明,理论结果与测量结果偏差小于1.00 dB,测量方法准确可行,采用任意分辨率带宽均能准确获得峰值场强和平均值场强,不受测量仪器性能的限制。所提方法对确保装备电磁安全性提供了一定的支撑,对其他调制方式的脉冲辐射场的测量方法研究也有参考意义。
The measurement method with correction for the pulse modulated radiation field using root mean square detection in frequency domain is put forward to solve the restriction caused by the resolution bandwidth.First,the measurement principle is proposed and the correction coefficients for field strength based on root mean square detection are defined.Then,the measurement result for the signal power and the correction coefficients for field strength are modeled theoretically and expressed by the power factor whose value can been worked out.Also the optimum selections of the resolution bandwidth and dwell time are discussed to simplify the correction method with the deviation precisely controlled.Finally,the experiment is carried out and it shows that the deviations between computation and measurement results of the correction coefficients are less than 1.00 dB.It proves that the measurement method is accurate and feasible.The peak field strength and average field strength can be accurately obtained by using any resolution bandwidth.So it is not limited by the performance of the instrument.The established method provides a certain support for ensuring the electromagnetic safety of equipment and also is helpful for researching measurement methods for pulse radiation field with other modulation modes.
作者
成伟兰
何纯全
万海军
冯婷婷
Cheng Weilan;He Chunquan;Wan Haijun;Feng Tingting(Naval Research Academy,Beijing 100161,China)
出处
《电子测量技术》
北大核心
2022年第24期15-21,共7页
Electronic Measurement Technology
关键词
电磁场
脉冲调制
频域测量
测量技术
电磁辐射
electromagnetic fields
pulse modulation
frequency-domain analysis
measurement techniques
electromagnetic radiation
