摘要
在3mm雷达对枪膛等小口径弹丸目标速度测量时,出现了测量结果的模糊性问题。结合电磁波在圆形口径金属管道内的传输参数,分析了多普勒频率模糊产生的原因及其分布特性。通过实验数据和理论数据的对比,进一步验证了在小口径条件下电磁波多模传输会导致多普勒频率模糊效应的现象。研究表明:在此次实验条件下得到了两种频率信息,这两种频率信息分别对应:TE11模和TE22模。为解决雷达多普勒测速中出现的多普勒频率模糊问题提供了实验依据。
When the 3 mm radar measures the target speed of a small-caliber projectile such as a rifle,the ambiguity of the measurement result appears.Based on the waveguide theory and Doppler principle,the transmission parameters of electromagnetic waves in a circular metal pipe are analyzed.The causes and distribution characteristics of Doppler frequency ambiguity are analyzed.By comparing the experimental data with the theoretical data,the phenomenon that the multimode transmission of electromagnetic waves causes the Doppler frequency blurring effect under small-caliber conditions is further verified.The research shows that two kinds of frequency information are obtained under the experimental conditions,and the two kinds of frequency information correspond to TE11 mode and TE22 mode.It provides an experimental basis for solving the Doppler frequency ambiguity problem in radar Doppler velocity measurement.
作者
张晓璐
张丕状
姚金杰
刘畅
Zhang Xiaolu;Zhang Pizhuang;Yao Jinjie;Liu Chang(Key Laboratory of Information Capturing and Processing in Shanxi Province,North University of China,Taiyuan 030051,China)
出处
《国外电子测量技术》
2019年第11期131-135,共5页
Foreign Electronic Measurement Technology
关键词
多普勒频率模糊
圆波导
多模传输
相速度
Doppler frequency ambiguity
circular waveguide
multimode transmission
phase velocity
