摘要
针对无人机载合成孔径雷达(synthetic aperture radar,SAR)在战场复杂电磁环境下易受到高功率微波(high-power microwave,HPM)武器攻击的问题,对无人机载SAR进行高功率微波前门耦合场路联合仿真。在CST(computer simulation technology)电磁仿真软件中建立了无人机载SAR天线模型,以脉冲调制的正弦波信号模拟HPM信号对天线进行辐照并采集天线端口耦合电压波形。将CST软件中得到的天线端口耦合电压信号注入SAR射频前端电路模型,完整模拟了高功率微波信号从场到路的耦合过程。仿真结果表明,SAR射频前端电路中的低噪声放大器是HPM致损的主要对象,限幅器的尖峰泄露功率会对后级电路的低噪声放大器产生威胁。通过仿真得到了无人机载SAR高功率微波前门耦合效应评估图。
In terms of the problem that SAR(synthetic aperture radar)in UAV(unmanned aerial vehicle)is easy to be attacked by HPM(high-power microwave)weapons in the complex electromagnetic environment of the battlefield,the field-circuit joint simulation of high-power microwave front-gate coupling of UAV′s SAR was carried out.Model of the SAR′s antenna was established in the CST(computer simulation technology)software.Model of antenna was irradiated with a pulse-modulated sinusoidal signal to simulate the HPM signal,and the antenna port coupling voltage waveform was collected.Antenna port coupling voltage signal obtained in the CST software was injected into the RF(radio frequency)front-end circuit model of SAR,which fully simulated the coupling process of high-power microwave signal from field to circuit.Simulation results show that the low noise amplifier in the RF front-end circuit of SAR is the main target of HPM signal damage,and the spike leakage power of the limiter will threaten the low-noise amplifier of the post-stage circuit.Through simulation,the evaluation diagram of the coupling effect of high-power microwave front door of UAV on-board SAR is obtained.
作者
沈衍
王玉明
陈亚洲
SHEN Yan;WANG Yuming;CHEN Yazhou(National Key Laboratory of Electromagnetic Environment Effects,Shijiazhuang Campus of Army Engineering University,Shijiazhuang 050003,China)
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2024年第6期131-140,共10页
Journal of National University of Defense Technology
基金
国家部委基金资助项目(LJ20212C031157)。
关键词
高功率微波
合成孔径雷达
前门耦合
联合仿真
high-power microwave
synthetic aperture radar
front-gate coupling
joint simulation
作者简介
第一作者:沈衍(1997-),男,江西九江人,博士研究生,E-mail:lgd_sy@163.com;通信作者:陈亚洲(1975-),男,江苏滨海人,教授,博士,博士生导师,E-mail:chen_yazhou@sina.com。
