摘要
本文应用一对共轭匹配的LiNbO_3基底SAW器件,在发射机中产生相干Chirp脉冲串信号,在接收机中频完成脉冲压缩,同时保存了Doppler相位信息。它较之光学、CCD及数字处理有一些不可替代的优点,并展现了机载SAR的某些特色。文中详细阐述了设计概念和LFM脉冲压缩系统,给出了实验结果和测绘飞行获得的一张雷达图像。它证明了方案和技术实施的有效性。
A pair of conjugate surface acoustic wave (SAW) dispersive filters with LiNbO3 is applied successfully in the pulse compression system for the first time in China. Hence, a series of Linear Frequency Modulation signals (Chirp) are coherently generated in the transmitter of Synthetic Aperture Radar (SAR) and the pulse compression is completed at IF stage of the SAR receiver. In the meantime, the Doppler phase information is remained. As compared with optical, CCD and digital processing, it takes some advantages and exhibits some distinguishing features of Chinese SAR system. In this paper, the design concept, the description of LFM pulse compression system and its experiment results are presented in detail. Finally, a sample of SAR image is given and the programme & technical line are verified.
出处
《电子学报》
EI
CAS
CSCD
北大核心
1992年第3期14-20,共7页
Acta Electronica Sinica
关键词
合成孔径
雷达
成像雷达
距离分辨
Synthetic aperture radar, Imaging radar, Pulse compression, Linear frequency modulation, Range resolution
