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

被引：8

作者：

Ma, Cong ^{[1
]}

Chen, Hao ^{[1
]}

Ye, Xingwei ^{[1
]}

Wang, Xiangchuan ^{[1
]}

Pan, Shilong ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Minist Educ, Key Lab Radar Imaging & Microwave Photon, Nanjing 210016, Peoples R China

来源：

CHINESE OPTICS LETTERS | 2020年 / 18卷 / 07期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

microwave photonics; ultra-high resolution; synthetic bandwidth; GENERATION;

D O I：

10.3788/COL202018.072501

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

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.

引用

页数：5

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