FMCW搜索监视雷达系统设计

摘要

基于调频连续波技术,给出了一种可用于海面目标搜索监视的轻型雷达的系统设计方案.该方案采用AD9914产生高宽带、低杂散扫频信号,采用反射功率对消技术与高速、高精度模数转换芯片AD9467实现弱目标回波信号接收.系统设计7大功能模块,模块间数据交换采用高速光纤接口,在提高系统电磁兼容特性的同时又便于在各类平台部署.实验结果表明,该系统能有效分辨邻近目标,探测灵敏度满足设计要求.%Based on the technology of frequency modulation continuous wave,a design scheme of the light radar for the search and surveillance of sea surface target is presented.The scheme uses AD9914 to generate high bandwidth,low spurious sweep signal,the reflection power cancellation technology and high speed,high precision analog digital conversion chip AD9467 to achieve weak target echo signal reception.The design of the system is composed of 7 functional modules,and the data exchange between the modules is based on the high speed optical fiber interface,meanwhile,the electromagnetic compatibility of the system is improved,and it is easy to be deployed in various platforms.The experimental results show that the system can effectively distinguish adjacent targets,and the detection sensitivity can meet the design requirements.