摘要
针对典型雷达装备受到单频电磁辐射时,雷达显示界面形成伪信号从而造成真实目标误判的问题,基于步进频雷达测距工作原理,以某型Ku波段步进频测距雷达为实验对象,开展了单频电磁辐射伪信号干扰效应实验,验证了两类伪信号干扰成像机理分析的正确性。通过实验得到了带内外典型频点的两类伪信号电平值随单频干扰场强的变化曲线,基于接收电路非线性失真分析分别解释了带内外伪信号电平值的变化规律,而后测得了两类伪信号干扰的敏感频段。实验结果表明:带内单频电磁辐射可对步进频雷达装备造成“脉冲”型伪信号干扰,伪信号出现的位置随机;带外单频电磁辐射可对步进频雷达装备造成“冲激”型伪信号干扰,伪信号出现的位置固定;随着单频干扰场强的提高,“脉冲”型伪信号电平值先线性增长,而后保持恒定;“冲激”型伪信号电平值先逐渐增大,达到最大值后逐渐降低。
In order to improve the electromagnetic protection capability of radar equipment,the two types of pseudo-signal interference imaging mechanism of radar equipment are revealed based on the working principle of stepper-frequency radar ranging for the problem of pseudo-signal formation on the radar display interface when typical radar equipment is subjected to single-frequency electromagnetic radiation,thus causing misjudgment of real targets.With a type of Ku-band step-frequency ranging radar as the test object,a single-frequency electromagnetic radiation pseudo-signal interference effect test was carried out to verify the correctness of the two types of pseudo-signal interference imaging mechanism analysis.The variation curves of the two types of pseudo-signal level values with single-frequency interference field strength at typical frequency points in and out of the band are obtained experimentally,and the variation laws of the pseudo-signal level values in and out of the band are explained respectively based on the nonlinear distortion analysis of the receiver circuit,and then the sensitive frequency bands of the two types of pseudo-signal interference are measured.The test results show that:In-band single-frequency electromagnetic radiation can cause"pulse"type pseudo-signal interference to stepper frequency radar equipment,the location of the pseudo-signal is random;out-of-band single-frequency electromagnetic radiation can cause"impulse"type pseudo-signal interference to stepper frequency radar equipment,the location of the pseudo-signal is fixed;as the single-frequency interference field strength increases,the"pulse"type pseudo-signal level value first increases linearly,and then remains constant,the"impulse"type pseudo-signal level value first gradually increases,reaches the maximum value and then gradually decreases.
作者
赵宏泽
魏光辉
潘晓东
杜雪
万浩江
ZHAO Hongze;WEI Guanghui;PAN Xiaodong;DU Xue;and WAN Haojiang(National Key Laboratory on Electromagnetic Environment Effects,Shijiazhuang Campus of Army Engineering University,Shijiazhuang 050003)
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2023年第6期851-858,共8页
Journal of University of Electronic Science and Technology of China
基金
部级基金。
关键词
效应规律
成像机理
伪信号干扰
单频电磁辐射
步进频雷达
effect law
imaging mechanism
pseudo-signal interference
single-frequency electromagnetic radiation
stepper-frequency radar
