一种使用Sagnac环和I/Q探测的全光微波测量方案  

All-optical photonic microwave measurement approach based on the Sagnac loop and I/Q detection

作　　者：康博超 樊养余[1] 谭庆贵[2] 高永胜 KANG Bochao;FAN Yangyu;TAN Qinggui;GAO Yongsheng(School of Electronics and Information,Northwestern Polytechnical University,Xi’an 710129,China;National Key Laboratory of Science and Technology on Space Microwave,China Academy of Space Technology,Xi’an 710100,China)

机构地区：[1]西北工业大学电子与信息学院,陕西西安710129 [2]西安空间无线电技术研究所空间微波技术国防重点实验室,陕西西安710100

出　　处：《西安电子科技大学学报》2022年第2期50-57,共8页Journal of Xidian University

基　　金：国家自然科学基金(61701412);全国博士后创新人才支持计划(BX201700197);中国博士后科学基金(2017M623238)。

摘　　要：针对高速无线通信、互联网、新一代雷达系统和实时信号处理系统对大瞬时带宽(大于10 GHz)和宽工作频率范围(几兆赫兹到数百吉赫兹)的微波测量需求,提出了一种基于Sagnac环和I/Q探测的全光微波信号测量方案,并使用该方案进行了频移和相移的测量。实验中,在10~40 GHz的工作频率范围内对多普勒频移进行了测量,该方案可清晰地辨别微波频移的方向,且频率分辨率高,测量最大误差为8 Hz。随后,在10~40 GHz的工作频率范围内对微波信号的相位偏移进行了测量,通过仿真实验证明本方案在10~40 GHz的工作频率范围内的测量误差小于7°。由于易于实现、结构简单和多功能可调谐的优点,该方案相比于传统的电子微波测量方案,在未来的宽带电子应用中具有极大的竞争优势。For high-speed wireless communication,the Internet,new-generation radar system and real-time signal processing system,microwave measurement systems with a large instantaneous bandwidth(greater than 10GHz)and wide working frequency range(several MHz to several hundred GHz)are required.To meet these demands,a simple and novel optical approach to implementing the broadband measurement approach is proposed.In the experiment,the Doppler frequency shifts are estimated with clear direction discrimination and high resolution with the max error of 8 Hz.Then,the approach is applied for phase detection,and the phase shifts are successfully measured and estimated for microwave signals with the operating frequency ranging from 10 to 40 GHz.The max error of phase measurement is calculated to be less than 7 degrees.The approach is simple,easy to implement,multifunctional and tunable,so that it can provide a more competitive approach to realizing the measurement of the microwave signals for future wideband electronics applications than electronic solutions.

关 键 词：相移测量 多普勒频移 微波光子 I/Q探测 SAGNAC环 

分 类 号：TN29[电子电信—物理电子学]