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  • Received: Dec. 16, 2019

    Accepted: Mar. 25, 2020

    Posted: May. 22, 2020

    Published Online: May. 25, 2020

    The Author Email: Shilong Pan (pans@nuaa.edu.cn)

    DOI: 10.3788/COL202018.072501

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    Cong Ma, Hao Chen, Xingwei Ye, Xiangchuan Wang, Shilong Pan. Ultra-high resolution microwave photonic radar with post-bandwidth synthesis[J]. Chinese Optics Letters, 2020, 18(7): 072501

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Chinese Optics Letters, Vol. 18, Issue 7, 072501 (2020)

Ultra-high resolution microwave photonic radar with post-bandwidth synthesis

Cong Ma, Hao Chen, Xingwei Ye, Xiangchuan Wang, and Shilong Pan*

Author Affiliations

  • Key Laboratory of Radar Imaging and Microwave Photonics, Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

Abstract

We demonstrate microwave photonic radar with post-bandwidth synthesis, which can realize target detection with ultra-high range resolution using relatively small-bandwidth radio frequency (RF) frontends. In the proposed radar, two temporal-overlapped linear frequency-modulated (LFM) signals with the same chirp rate and different center frequencies are transmitted. By post-processing the de-chirped echoes in the receiver, a signal equivalent to that de-chirped from an LFM signal with the combined bandwidth is achieved. In a proof-of-concept experiment, two LFM signals with bandwidths of 8.4 GHz are exploited to achieve radar detection with an equivalent bandwidth of 16 GHz, and a range resolution of 1 cm is obtained.

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