超高分辨率机载SAR 宽带激励源设计与实现

基金项目:

中国科学院知识创新项目(KGOX2-SW-414)

Design and Implementation of Wideband Exciter for an Ultra-high Resolution Airborne SAR System

1.
(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)
2.
(Graduate University of Chinese Academy of Sciences, Beijing 100049, China)

摘要: 针对分辨率优于0.1 m 的机载合成孔径雷达(SAR)系统，该文设计实现了中心频率14.8 GHz，带宽3.2 GHz的宽带线性调频(LFM)激励信号源。详细介绍了技术方案的选择，关键技术的实现，并对产生的宽带调频信号进行了详细的测试与分析。该信号源作为机载SAR 系统中子系统的一部分，完成了飞行试验，并获得了分辨率优于0.1m 的雷达图像，验证了该方案设计和技术实现的有效性。
- 合成孔径雷达 /
- 激励源 /
- 宽带 /
- 线性调频
Abstract: We designed and implemented a wideband Linear Frequency Modulated (LFM) pulse compression exciter with 14.8 GHz carrier and 3.2 GHz bandwidth based on an ultra-high resolution airborne SAR system with a better than 0.1 m resolution. The selection of a signal generation scheme and some key technique points for wideband LFM waveform are presented in detail. Then, an acute test and analysis of the LFM signal are performed. The final airborne experiments demonstrate the validity of the LFM source, which is one of the subsystems in an ultra-high resolution airborne SAR system.
- Synthetic Aperture Radar (SAR) /
- Exciter /
- Wideband /
- Linear Frequency Modulation (LFM)