米波雷达发射激励源设计

介绍了一种米波雷达发射激励源的设计,该激励源利用直接数字合成(DDS)技术在射频直接合成所需的雷达信号,经滤波放大后送往发射机。在介绍系统工作原理和DDS技术的基础上,对工程设计中遇到的几个实际问题进行了阐述,并详述了系统同步的实现方法,介绍了累积误差问题及其解决办法,给出了电磁兼容设计的注意事项,最后给出了该激励源所达到的性能指标。

Design of Excitation Source for Meter-wave Radar Transmitter

This paper introduces the design of an excitation source for meter-wave radar transmitter,which uses direct digital synthesis（DDS）technology to directly synthesize the radar signal needed at radio frequency and the signal is sent to the transmitter after being filtered and amplified.Based on introducing the operation principle of system and DDS technology,this paper expounds several practical problems existing in engineering design,expatiates on the realization method of system synchronization,introduces the issue of accumulation error and its solution method,and gives some notice points of electromagnetic compatibility design,finally puts forward the performance indexes reached by the excitation source.