A 94 GHz Pulse Doppler Solid-State Millimeter-Wave Cloud Radar

被引：1
|
作者：
Lin, Hai [1 ]
Wang, Jie [1 ]
Chen, Zhenhua [1 ,2 ,3 ]
Ge, Junxiang [1 ,2 ,3 ]
机构：
[1] Nanjing Univ Informat Sci & Technol, Sch Elect & Informat Engn, Nanjing 210044, Peoples R China
[2] Nanjing Univ Informat Sci & Technol, Inst Elect Informat Technol & Syst, Nanjing 210044, Peoples R China
[3] Nanjing Univ Informat Sci & Technol, Jiangsu Key Lab Meteorol Observat & Informat Proc, Nanjing 210044, Peoples R China
来源：
REMOTE SENSING | 2023年 / 15卷 / 12期
基金：
中国国家自然科学基金;
关键词：
MMCR; W-band; solid-state; pulse Doppler; dual PRF; DESIGN; CHINA;
D O I：
10.3390/rs15123098
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A 94 GHz pulse Doppler solid-state millimeter-wave cloud radar (MMCR), Tianjian-II (TJ-II), has been developed. It reduces the size and cost using a solid-state power amplifier (SSPA) and a single antenna. This paper describes the system design, including hardware and signal processing components. Pulse compression, segmented pulse, and dual pulse repetition frequency (PRF) technologies are employed to overcome the limitations imposed by the low power of the SSPA and the high frequency of 94 GHz. The TJ-II also features a dual-polarization, high-gain antenna for linear depolarization ratio detection and a time-division receive channel to improve channel consistency and save on costs. To achieve high flexibility and low interference in signal transmission and reception, the TJ-II uses software-defined radio technology, including direct digital synthesis, digital downconversion, and bandpass sampling. A series of Doppler power spectrum processing methods are proposed for detecting weak cloud signals and improving scene adaptability.
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收藏
页数：13
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