摘要
为了提高高轨电子侦察卫星对雷达信号的侦收灵敏度,增大截获概率,提出了一种基于天线波束偏转的雷达主瓣侦收方法。根据雷达辐射源最大仰角,高轨卫星可以获得雷达信号的主副瓣侦收区域。通过天线波束在短时间内进行特定方向和一定角度的偏转,使指向雷达副瓣的天线波束实时对准雷达主瓣侦收区域,实现雷达主瓣侦收。仿真实验结果表明:取雷达主瓣最大仰角为40°、天线波束宽度为2°,通过天线波束偏转7.6°,可完成雷达辐射源主瓣侦收;与副瓣侦收相比,主瓣侦收信号信噪比至少可提高12.24 d B。
In order to improve the signal detection sensitivity and increase the interception probability of high-orbit electronic reconnaissance satellites to radar signals,a detection method of radar main lobe areas is proposed based on antenna beam deflection. According to the maximum elevation of radar emitters,high-orbit satellites can obtain the main lobe and side lobe reconnaissance areas of radar signals. By deflecting certain specific direction and angle in a short period of time,the antenna beam can point to the main lobe reconnaissance area of radars in real time and realize the radar main lobe detection. Simulation results show when the maximum elevation angle of a radar main lobe is40° and the antenna beam width is 2°,the system can complete radar main lobe detection by deflecting the antenna beam 7. 6°. Compared with the radar side lobe detection,the radar main lobe detection can improve the signal noise ratio（ SNR） by 12. 24 d B at least.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2015年第6期733-738,共6页
Journal of Nanjing University of Science and Technology
基金
国家自然科学基金(61370017)
关键词
天线
波束偏转
高轨卫星
雷达
主瓣侦收
电子侦察卫星
侦收灵敏度
信噪比
antennas
beam deflection
high-orbit satellites
radars
main lobe detection
electronic reconnaissance satellites
detection sensitivity
signal noise ratio
