Zhang Xiangpeng, Zeng Henan, Yang Jiyao, Yin Ziqiang, Sun Qiang, Li Wangzhe
Opt Express. 2020 Apr 27;28(9):13650-13661. doi: 10.1364/OE.386285.
A novel reconfigurable microwave photonic (MWP) radar has been proposed and experimentally demonstrated. At a transmitting end, a microwave signal with a large bandwidth and ultra-low phase noise is generated by a Fourier domain mode locking optoelectronic oscillator. At a receiving end, photonics-based de-chirp processing is implemented by phase-modulating light waves in a dual-drive Mach-Zehnder modulator and mixing the modulated light waves at a photodetector. Without the requirement of external RF sources, the developed photonics-assisted programmable radar is capable of generating and processing microwave signals with adjustable format, bandwidth and central frequency. The proposed radar working from X to Ku band with an instantaneous bandwidth of 2 GHz is demonstrated. The reconfiguration of the radar is theoretically analyzed. The tunability of radar bandwidth and central frequency is investigated. Microwave imaging of a pair of trihedral corner reflectors based on the developed MWP radar is achieved.
一种新型的可重构微波光子（MWP）雷达已被提出并通过实验验证。在发射端，通过傅里叶域锁模光电振荡器产生具有大带宽和超低相位噪声的微波信号。在接收端，基于光子学的去啁啾处理通过在双驱动马赫-曾德尔调制器中对光波进行相位调制并在光电探测器处混合调制后的光波来实现。无需外部射频源，所开发的光子辅助可编程雷达能够生成和处理具有可调格式、带宽和中心频率的微波信号。展示了所提出的工作在X波段至Ku波段、瞬时带宽为2 GHz的雷达。对雷达的重构进行了理论分析。研究了雷达带宽和中心频率的可调性。基于所开发的MWP雷达实现了一对三面角反射器的微波成像。
