ottd

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 .

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。

Superior to traditional electronic countermeasures , optical true-time delay ( OTTD ) has the advantages of extremely large signal bandwidth , immunity to electromagnetic interference , low transmission loss and light weight .

光真延时因其大信号带宽、抗电子干扰、传输损耗小、重量轻等优点，在电子对抗中有着明显的优势，而受到广泛的关注与深入的研究。

The Optically Controlled Phased Array Radar uses Optical True Time Delay ( OTTD ), abates the limit to signal instantaneous bandwidth aroused by aperture effect , actualizes the scan in broadband and wide-angle range .

采用光纤技术的X波段光控相控阵雷达通过引入光实时延迟线OTTD，减轻了传统相控阵雷达因渡越时间和孔径效应对信号瞬时带宽的限制，实现了宽带宽角扫描。