高精度数控微波移相器设计  

Design of A high Resolution Digital Microwave Phase Shifter

作　　者：王霄峻[1] 赵洪新[1] 殷晓星[1] 徐鸿飞[1] 

机构地区：[1]东南大学信息科学与工程学院,南京210096

出　　处：《微波学报》2009年第3期80-82,共3页Journal of Microwaves

摘　　要：使用DDS级联数字移相器和PLL技术相结合的方法,实现了一种新型的微波信号移相器,可针对单音微波信号进行精确数字控制移相,最高移相分辨率远超过常规DDS移相器,达到了2π×2-24rad。介绍了系统设计方案及电路工作原理,并给出了实验结果。此电路适用于需要精确控制两路或多路正弦信号相对相位移的应用场合,经过电路扩展,还可用于带限信号的精确移相。A novel digital microwave phase shifter is proposed for high resolution phase adjustment of single tone microwave signals. The device is constructed by concatenated DDS digital phase shifter and analog phase locked loops. The phase step resolution of this device is 2π×2^-24 radians, far beyond the capability of typical DDS phase shifters. System design schematic and operation principle is explained as well as experimental restdts. The idea can be implemented to precisely control the phase differences of two or more single tone carriers. High resolution phase adjustments of band limited signal can be realized by some necessary circuit expansion.

关 键 词：微波移相器 数字控制 直接数字合成 锁相环 

分 类 号：TN623[电子电信—电路与系统]