基才AD9959的高精度多通道雷达信号源设计

摘要

In order to ensure precision of power synthesize in phased array radar, a kind of high-precision multi-channel radar generator based on AD9959 is designed. Radar generator use host computer and FPGA to control ad9959 and Produce 32 channel sine wave.linear frequency modulation and encoding and so on, designed a multi--channel signal amplitude and phase measuring and adjustment system using ad8302. The radar generator have been applied in ,project, and the experimental results showed that the radar generator had several advantages such as high frequency stability, high precise of phase amplitude consistency, which fully meet the techinical requirements and performance index of the radar generator in phased array radar.%现代相控阵雷达为了保证空间功率合成精度需要高精度的雷达信号。设计实现了一种以AD9959为核心的高精度多通道雷达信号源。信号源利用多片AD9959产生32路正弦波、线性调频以及相位编码等多种信号形式．并设计采用AD8302对多路信号的幅度和相位进行检测与调整。该信号源已应用实际工程中，现场实验结果表明，该信号源系统产生的高频信号频率稳定度高、相位幅度一致性好，完全满足对信号源的性能指标的要求。