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LIU Wenyi, ZHANG Feng, SUN Faxiao, GONG Zhaoqian, LIU Xiaojun, FANG guangyou. Radiation Principle and Spatial Direct Modulation Method of a Low Frequency Antenna Based on Rotating Permanent Magnet[J]. Chinese Journal of Electronics. doi: 10.1049/cje.2020.00.130
Citation: LIU Wenyi, ZHANG Feng, SUN Faxiao, GONG Zhaoqian, LIU Xiaojun, FANG guangyou. Radiation Principle and Spatial Direct Modulation Method of a Low Frequency Antenna Based on Rotating Permanent Magnet[J]. Chinese Journal of Electronics. doi: 10.1049/cje.2020.00.130

Radiation Principle and Spatial Direct Modulation Method of a Low Frequency Antenna Based on Rotating Permanent Magnet

doi: 10.1049/cje.2020.00.130
Funds:  This work is supported by the National Natural Science Foundation of China (61827803,61901441).
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  • Author Bio:

    received the B.S. degree from Dalian Maritime University in 2018 and the M.S. degree from the University of the Chinese Academy of Sciences in 2021. His research interests are antenna theory and design. (Email: liuwenyi18@mails.ucas.edu.cn)

    (corresponding author) received the B.S degree and M.S degree from Northwestern Polytechnical University in 2004 and 2007. He received Ph.D degree from the Insititute of Electronics, Chinese Academy of Sciences in 2011. His man research intrests include ultra-wideband radar technology, wideband antenna theory and technology, near-field magnetic communication technology. (Email: zhangfeng002723@aircas.ac.cn)

    received the B.S. degree from Dalian Maritime University in 2019. He is a graduate student of Electronic and Communication Engineer-ing at the University of the Chinese Academy of Sciences. His research direction is low frequency communication technology. (Email: sfx_sfx666@163.com)

    is a Research Associate at the Institute of Aerospace Information Research (AIR) under the Chinese Academy of Sciences (CAS).He obtained his Master’s Degree from Beijing Institute of Technology on 2012. His research interests include signal processing and Software Engineering. (Email: zqgong@mail.ie.ac.cn)

    received the Ph.D. from the Institute of electronics, Chinese Academy of Sciences in 2001. He is mainly engaged in research on ultra-wideband radar technology, signal and information processing. (Email: lxjdr@mail.ie.ac.cn)

  • Received Date: 2020-05-08
  • Accepted Date: 2021-09-22
  • Available Online: 2022-01-06
  • The theory of mechanical antenna is still in its infancy at present, and its radiation mechanism, field distribution, modulation methods and other basic theories need to be explored and improved. The radiation mechanism of a Rotating-magnet Based Mechanical Antenna (RMBMA) is explored. An equivalent radiation model of the mechanical antenna is established. The field formula of mechanical antenna is derived using this model and rotation matrix. The spatial direct modulation method of mechanical antenna is also investigated. Two prototype antennas are fabricated using DC/AC servo motors and NdFeB magnets, and experiments are carried out to verify the correctness of the derivation and analysis. The measured and simulated results are in consistent with each other. By precisely controlling the moving parameters of an AC servo motor, signal of Binary Amplitude Shift Keying (BASK) is generated, and the original code sequence is recovered by demodulation.
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