Systems Engineering and Electronics ›› 2019, Vol. 41 ›› Issue (2): 249-253.doi: 10.3969/j.issn.1001-506X.2019.02.04

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Broadband active antenna for astronomical observation microsatellite at the longest wavelengths

ZHAO Fei1,2,3, WU Lin2, YI Min1,2, YAN Jingye2,3, WU Ji2,3   

  1. 1. Key Laboratory of Microwave Remote Sensing,Chinese Academy of Sciences, Beijing 100190, China;
    2. National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China;
    3. University of Chinese Academy of Sciences, Beijing 100049, China
  • Online:2019-01-25 Published:2019-01-24

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Abstract: Path finder of discovering the sky at the longest wavelengths (DSLP) is a pioneering mission of interferometric radio astronomy at the longest wavelengths on the lunar orbit. Operating frequency of DSLP ranges from 1 to 30 MHz, and one of its key technologies is the broadband active receiving antenna. This paper describes the scheme of DSLP active antenna, and focuses on its noise characteristics. The research results show that the active antenna is not a combination of passive antenna and preamplifier in the traditional sense, its main function is impedance matching, and it takes into account the noise requirements.

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