摘要
近年来,地面雷达分布式天线之间的信号传输,正朝着大宽带、高精度方向发展。为满足这一发展要求,针对当前分布式天线间射频信号稳相传输方法中,射频信号相位比较环节受到电子瓶颈限制,工作带宽窄,且对高频信号间的相位差检测精度低等问题,提出了一种新型的移频外差相位比较方法。该方法通过比较两个低频电信号的相位差,即可得到高频信号在光纤中传输时引入的相位抖动。由于将相位差大小不变地从高频转移到低频信号上,因此提高了相位差检测的精度,降低了系统成本,提高了系统的工作带宽。理论分析和仿真验证了该方法的可行性。
In recent years,the signal transmission between distributed antennas of ground radar is developing towards large broadband and high precision.In order to meet this development requirement,a new frequency shift heterodyne phase comparison method is proposed aiming at the problems that the phase comparison link of RF signal is limited by electronic bottleneck and the working band width is narrow,and the phase difference detection between high-frequency signals is faced with low accuracy in the current distributed radio frequency signal stable phase transmission method.By comparing the phase difference between two low frequency signals,the phase jitter introduced in the transmission of high frequency signal in optical fiber can be obtained.Because the phase difference is transferred from high frequency to low frequency signal without changing its size,the precision of phase difference detection is improved,the system cost is reduced,and the working bandwidth of the system is increased.The feasibility of this method is verified by theoretical analysis and simulation.
作者
姬在文
厉旭冉
巫修斌
郁嵩
JI Zaiwen;LI Xuran;WU Xiubin;YU Song(Nanjing Research Institute of Electronics Technology,Nanjing210039,China)
出处
《电子质量》
2024年第5期51-56,共6页
Electronics Quality
关键词
分布式天线
稳相传输
移频外差
相位比较
distributed antennas
phase stable delivery
frequency-shift heterodyne
phase comparison
