介绍了直接数字合成技术（DDS）的工作原理，分析了结构组成、特点和影响其性能的主要参数；并针对其特点讨论了它在相控阵雷达中的应用，讨论了一种以DDS单元为核心的相控阵T／R组件实现方案，以及该设计方案的特点；在此基础上重点对T／R组件中的DDS单元电路进行了设计；最后对测试结果进行了分析。

In this paper we firstly introduce the concept, architecture, features and key parameters of the Direct Digital Synthesizer. Secondly we discuss the overall solution of signal processing system in Phased Array Radar that is based on DDS.Thirdly we focus on the design of DDS module and in the end the experiment result of DDS module is given.

TN957.51