介绍了基于光实时延迟线、基于外差混频技术和基于矢量和技术的光子射频移相器，对其工作原理和技术特点作了分析。
Photonic RF phase shifters based on OTTD (optical true time delay), heterodyne mixing technique and vector sum technique were introduced. The principles and features were proposed and analyzed.
而反射中心波长基本不变，该实验装置可以用于光控相控阵雷达天线的实时延迟线和光纤色散补偿。
The setup can be used as the true-time delay line in optically controlled phased array antenna and to compensate the fiber dispersion.
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