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Zhiqiang Wang

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Proceedings Article | 10 October 2020 Poster + Paper

Study on phase stability characteristics of optically controlled phased array radar antenna system

Huan Liu, Chunyan Wang, Zhiqiang Wang, Hao Sun

Proceedings Volume 11552, 1155219 (2020) https://doi.org/10.1117/12.2573587

KEYWORDS: Signal detection, Phased array optics, Phased arrays, Radar, Antennas, Feedback control, Control systems, Phase shifts, Wave plates, Mirrors

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A kind of Michelson interference structure is used to improve the round-trip phase correction method and realize the feedback phase stabilization control. In the system, the phase shifter pre-compensation control, 1/4 wave plate debirefringence and Faraday rotator de-polarization sensitivity effectively avoid the polarization fading phenomenon existing in photoelectric detection by external factors, and realize the signal arm carrying phase jitter. At the same time, the AOFS driven by the intermediate frequency signal realizes the construction of the reference arm of the interferometer. Through photoelectric detector to beat frequency of two arms mutual interference signal, the beat frequency signal and intermediate frequency reference signal phase matching, can get the phase perturbation of optical fiber transmission system, the phase discriminator output signal processing can be used as the bias current of SOA control signal, realize the purpose of the feedback control signal phase, has solved the traditional approach to the problem of high frequency signal phase is not convenient to monitor.

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