Volume 42 Issue 5
Oct.  2022
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Article Navigation >  Chinese Journal of Space Science  > 2022  >  42(5): 991-1003
RU Penglei, LIU Mengwei, GONG Junjie, WANG Wen, ZHU Haotian, ZHU Di, DONG Xiaolong. High Resolution Design and Realization of 400 MHz Bandwidth Surface Acoustic Wave Chirp Transform Spectrum Analyzer for Deep Space Exploration (in Chinese). Chinese Journal of Space Science, 2022, 42(5): 991-1003 doi: 10.11728/cjss2022.05.210611071
Citation: RU Penglei, LIU Mengwei, GONG Junjie, WANG Wen, ZHU Haotian, ZHU Di, DONG Xiaolong. High Resolution Design and Realization of 400 MHz Bandwidth Surface Acoustic Wave Chirp Transform Spectrum Analyzer for Deep Space Exploration (in Chinese). Chinese Journal of Space Science, 2022, 42(5): 991-1003 doi: 10.11728/cjss2022.05.210611071
shu

High Resolution Design and Realization of 400 MHz Bandwidth Surface Acoustic Wave Chirp Transform Spectrum Analyzer for Deep Space Exploration

doi: 10.11728/cjss2022.05.210611071
  • 1.

    Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190

  • 2.

    University of Chinese Academy of Sciences, Beijing 100049

  • 3.

    National Space Science Center, Chinese Academy of Sciences, Beijing 100190

  • Received Date: 2021-06-10
  • Accepted Date: 2021-09-22
  • Rev Recd Date: 2022-03-03
    • Available Online: 2022-09-08
    Abstract
  • Chirp Transform Spectrum analyzer (CTS) has the advantages of low power consumption and high stability, and has unique advantages in deep space exploration. The 180 MHz bandwidth chirp transform spectrum analyzer mounted on the Rosetta comet detector is the only back-end heterodyne real-time spectrum analyzer that has successfully completed space missions so far. Based on the principle of chirp transform spectrum analysis, a 400 MHz bandwidth Chirp transform spectrum analyzer was designed and built by combining the digital expander technology with the Surface Acoustic Wave (SAW) compressor technology. By analyzing the compression results in the frequency band, the phase difference between the expander and the compressor was introduced as an important factor affecting the compression waveform. According to the two key parameters of the pulse compression waveform, the main lobe width and the peak side lobe ratio, the optimal matching design of the digital expander and the analog SAW compressor are completed. The compression result of the system is optimized, so that the resolution of the system reaches the theoretical value of 100 kHz. FM signal and multi-frequency signal are used to test and verify the CTS system.

     

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