模拟微波光传输链路中的相位检测技术研究

Research on the Phase Detection Technology in Analog Microwave Photonic Links

摘要:

针对目前模拟微波光子信号在长距离传输中相位不稳的现象,提出了一种基于双载波矢量和原理的相位检测技术。文中对该技术的基本检测原理进行了详细推导;实验上以1GHz的射频信号为例,对其光路设计、实验进行了系统研究。实验结果显示,该相位检测系统可对1GHz信号实现精度优于3°的相位检测。基于该方案的相位检测系统由于分辨率高、结构简单、易于构建等优点可推广至毫米波频段,应用于光控相控阵、本振信号传输以及空间技术等多个领域的相位检测,进一步实现稳相传输。

Abstract:

A phase detection technology based on double-carrier vector-sum method was proposed for the phase stabilized distribution in long haul analog microwave photonic links. The basics principles of phase detection were analyzed. The optic-link design, experiment process and the corresponding results were researched in detail. A phase detection resolution of about 3 degrees was obtained for 1GHz signal. This technology can be widely used in optically controlled phased array, local oscillator distribution system and other optic distribution fields due to its high resolution, simple structure and low cost.