中国航空工业集团公司雷华电子技术研究所, 江苏 无锡 214000
基于交叉学科融合的微波光子技术是新体制机载雷达的重要发展方向之一, 能够用光学方法完成在电域中难以实现甚至无法实现的射频信号处理与高速传输等功能。国内微波光子雷达系统研究仍处于功能演示阶段, 亟需面向实际作战需求的系统级验证手段来提升机载微波光子雷达的工程化进程。提出了一种面向系统性能评估的机载微波光子雷达集成验证系统, 分析了系统级验证的必要性, 论述了集成验证系统的关键构成要素和性能指标映射与评估方法, 并总结了所提集成验证系统的优势。
机载雷达 微波光子 集成验证系统 指标映射与评估 airborne radar microwave photonic integrated validation system index mapping and evaluation
Author Affiliations
Abstract
Microwave Photonics Center, Air Force Early Warning Academy, Wuhan 430019, China
Photonic generation of radio-frequency (RF) arbitrary microwave waveform with ultra-wide frequency tunable range based on a dispersion compensated optoelectronic oscillator (OEO) is proposed and experimentally demonstrated. Dispersion compensation scheme and specially designed fiber Bragg grating (FBG)-based Fabry–Perot (F-P) filters are employed in the OEO loop to realize a frequency tunable range of 3.5–45.4 GHz. An optimization process provided by the combination of an erbium-doped fiber amplifier (EDFA) and FBG is employed to improve the signal-to-noise ratio (SNR) of final RF signals. The generation of linear-frequency and phase-coded microwave waveforms, with a tunable carrier frequency ranging from 4 to 45 GHz and tuned chirping bandwidths or code rates, is experimentally demonstrated.
060.0060 Fiber optics and optical communications 350.4010 Microwaves Chinese Optics Letters
2017, 15(10): 100603
