首页|Low-Frequency Signal Generation in Space Based on High-Frequency Electric-Antenna Array and Doppler Effect

Low-Frequency Signal Generation in Space Based on High-Frequency Electric-Antenna Array and Doppler Effect

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Low-frequency signals have been proven valuable in the fields of target detection and geological exploration. Nevertheless, the practical implementation of these signals is hindered by large antenna diameters, limiting their potential applications. Therefore, it is imperative to study the creation of low-frequency signals using antennas with suitable dimensions. In contrast to conventional mechanical antenna techniques, our study generates low-frequency signals in the spatial domain utilizing the principle of the Doppler effect. We also defines the antenna array architecture, the timing sequency, and the radiating element signal waveform, and provides experimental prototypes including 8/64 antennas based on earlier research. In the conducted experiments, 121 MHz, 40 MHz, and 10kHz composite signals are generated by 156 MHz radiating element signals. The composite signal spectrum matches the simulations, proving our low-frequency signal generating method works. This holds significant implications for research on generating low-frequency signals with small-sized antennas.

Antenna arraysTime-frequency analysisRadar antennasDoppler effectArray signal processingServersRadar

Anjing Cui、Daojing Li、Jiang Wu、Jinghan Gao、Kai Zhou、Chufeng Hu、Shumei Wu、Danni Shi、Guang Li

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National Key Laboratory of Microwave Imaging, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, China|School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing, China

National Key Laboratory of Microwave Imaging, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, China

National Key Laboratory of Science and Technology on Unmanned Aerial Vehicle, Northwestern Polytechnical University, Xi'an, China

Beijing BBEF Science & Technology Co., Ltd., Beijing, China

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2025

Journal of systems engineering and electronics

Journal of systems engineering and electronics

ISSN:
年,卷(期):2025.36(1)
  • 32