【摘要】 本文针对行星大气探测、彗星与小行星探测等深空探测需求,研究面向深空探测的宽带低功耗频谱仪技术。根据深空探测低功耗、抗辐照等应用需求,研究基于大时间带宽积声表面波信号处理器的Chirp变换谱分析仪的关键技术。利用中心频率为1 GHz、带宽为400 MHz、色散时间为10 us的声表面波压缩线设计了带宽为400 MHz、分辨率为100 kHz的频谱仪系统,并对系统分辨率、旁瓣电平等关键指标进行仿真分析;搭建了一个带宽为20 MHz、分辨率为15 kHz系统,并进行了测试,验证了设计。试验系统的测试结果表明基于chirp变换的高分辨频谱仪非常适用于对功耗、体积等有着很高要求的小行星和彗星等深空探测应用。更多还原

【Abstract】 This paper focuses on the needs of planetary atmosphere,comet and asteroid deep space detection,and studies broadband low-power consumption spectrum analyzer technology for deep space exploration. According to the needs of low-power,anti-irradiation and other application requirementsin deep-space detection,the key technology of Chirp transform spectrum analyzer based on the high timebandwidth-product surface acoustic wave signal processor is studied.Using a 400 MHz,10 us dispersion time surface acoustic wave compression line designs a 400 MHz bandwidth,100 kHz resolution spectrum analyzer system.Then we did the simulation analysis of the system resolution and sidelobe level parameters,and finally carried out a 20 MHz bandwidth,15 kHz resolution spectrum analyzer system and test the results.It shows that high-resolution spectrometer based on chirp transform is suitable for power,volume and other demanding in asteroids,comets and other deep-space exploration.更多还原