双中频超外差式信号补偿闭环反馈系统的设计

Design of Double Superheterodyne Closed-loop Feedback System to Compensate Signal

摘要:

为补偿搜索雷达发射机探测信号或系统的不稳定性,提出了一种雷达发射机的双通道信号补偿闭环反馈系统；该反馈系统采用双中频超外差式结构,将发射机的高频发射信号两次下变频,得到的中频信号反馈到雷达发射机前端,与发射机一起构成闭环控制系统；中频信号对发射机输入端的中频信号实时检测,以补偿发射信号的幅度和相位不稳定性,从而提高了搜索雷达对探测目标的高精度测量；系统应用结果证明,该系统方案稳定可靠,具有一定的实用价值和参考意义。

Abstract:

In order to compensate the instability of detector signals or systems of radar transmitter, it advances a double superheterodyne& double channel closed-loop feedback system to compensate signals of radar transmitter. This system adopts the double superheterodyne framework to secondary mix RF signal and feedback the intermediate frequency to the front of transmitter. They compose a closed-loop feedback system. The intermediate frequency real-timely detect and compensate the amplitude and phase of transmit-signals, and improve explore precision of radar. The application result argues that the system project is stable, credible, practical and advisable.