AD9959在雷达步进频率源中的应用  

Applications of AD9959 in Stepped-frequency source of radar

作　　者：徐建国[1] 曹文剑[1] 陆珉[1] 周朝京[1] 

机构地区：[1]国防科技大学,长沙410073

出　　处：《电子测量技术》2007年第9期162-164,共3页Electronic Measurement Technology

摘　　要：本文介绍了ADI公司的多通道直接频率合成器(DDS)AD9959的结构和特性,结合AD9959和MCU设计了探地雷达的步进信号源,并依据测量数据运用数学方法计算出每一个频点的幅度因子,再通过软件方法对输出的幅度进行了校正,使得输出为幅度稳定、相位连续、频率准确、频率切换快速的正弦信号。The structure and features of the multi-channel DI）S chip AD9959 is introduced, and a design of a steppedfrequency source for GPR radar using the AD9959 and MCU is carried out. Using mathematical method amplitude scale factor for each frequency point is computed according to the measured data, then output amplitude is corrected through software algorithm, and all these steps contributed to a sine signal with steady amplitude, continuous phase, precise frequency,fast frequency-switch is gained.

关 键 词：直接频率合成器 AD9959 步进频率 

分 类 号：TN741[电子电信—电路与系统]