微波光子辅助的均匀圆阵相关干涉仪测向技术
打开文本图片集
中图分类号：TN98 文献标志码：A 文章编号：1000-582X（2026）04-089-09
Photonics-based microwave correlative interferometer direction finding approach with uniform circular array
ZHANG Xianyu， AN Kang，LIANG Tao （The 63rd Research Institute，National University of Defense Technology，Nanjing 210o07，P.R.China）
Abstract： As one of the mainstream direction finding schemes，correlative interferometer has many extraordinary advantages，such as lowcomplexity computation，high accuracy，stronganti-interference etc.Besides，the uniform circular array can measure the azimuth angle and elevation angle simultaneously，and has the advantages of uniform direction finding accuracy and compact structure. Motivated by the above，this paper investigates the correlative interferometer direction finding using a uniform circular array. Since traditional electrical phase detectors are faced with some botlenecks，such as bandwidth limitation，low frequency，electromagnetic interference etc.，a photonic phase detector scheme has been presented to measure the phase diference.A dualparalel Mach-Zehnder modulator （DPMZM） is adopted to construct an optical parallel interference structure which can estimate the phase diferences by optical power measurement.The phase shift in DPMZMcan be set to0∘ and 180∘ by adjusting the DC bias.Then，the power of the output optical signal can be measured in both two cases.Besides，a Phase diference mapping function based on the ratio of optical power measurements has been proposed to improve the resolution of the power measurement and the estimation accuracy ofthe phase diference. Finally，the availabilityof the proposed scheme is investigated via experiments which shows that measurement errorof phase difference is less than ±1∘ from 0∘ to 360∘ and the angle-of-arrival estimation accuracy isless than 1.0082∘
Keywords： interferometers;uniformcirculararray;directionofarrival; microwave photonics;phase detector;dualparallel Mach-Zehnder modulator
测向技术是指通过技术手段准确获取信号的来波方向信息，这一技术广泛应用于宽带移动通信、雷达、电子战等领域[-3]。（剩余10709字）