摘要
高频雷达天线阵受风的作用会产生随机晃动,导致发射和接收信号的相位噪声一定程度的恶化,从而降低高频雷达系统的目标检测性能。针对高频雷达发射天线阵相位噪声恶化的情况,从天线单元和反射网2个主要方面对恶化原因展开了分析,得出了相位噪声恶化原因为天线单元阻抗变化和反射网晃动所引起的信号相位调制结论。根据结果分析,提出了相应的改进方案,并对改进后的天线阵相位噪声进行了测试,测试结果表明相位噪声比改进前降低了10 dB。
HF radar antenna array will swing when it is exposed to wind.The swing can deteriorate the phase noise of transmitting and receiving signals of HF radar and reduce the target detection ability of HF radar.For this case,this paper analyzes the cause of phase noise deterioration about antenna element and reflector net,and concludes that the cause is the signal phase modulation due to antenna element impedance changing and reflector net swing.Based on the calculation results,the corresponding improved design scheme is presented.The system performance with improved antenna array is tested,and the result shows that the phase noise is reduced by 10 dB.
出处
《无线电工程》
2017年第8期58-61,共4页
Radio Engineering
基金
国家自然科学基金资助项目(61271379)
关键词
高频雷达
相位噪声
天线阵
天线单元
反射网
HF radar
phase noise
antenna array
antenna element
reflector net
