Chinese Optics Letters, 2020, 18 (7): 072501, Published Online: May. 25, 2020   

Ultra-high resolution microwave photonic radar with post-bandwidth synthesis Download: 689次

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.

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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