Compressing Electromagnetic Field by Rational Interpolation of the Spherical Wave Expansion Coefficients

作者

  • Haobo Yuan School of Electronic Engineering Xidian University, Xi’an, Shaanxi, China
  • Pu Yang School of Electronic Engineering Xidian University, Xi’an, Shaanxi, China
  • Nannan Wang School of Electronic Engineering Xidian University, Xi’an, Shaanxi, China
  • Yi Ren School of Electronic Engineering Xidian University, Xi’an, Shaanxi, China
  • Shasha Li Beijing Institute of Space Long March Vehicle Beijing, China

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https://doi.org/10.13052/2024.ACES.J.400405

关键词:

Antenna, data compression, rational interpolation, spherical harmonic transform

摘要

It is of great significance to obtain the electromagnetic field radiated by an antenna or scattered by an object over a frequency band. But this data often occupies so large a memory that cannot be applied readily. This paper proposes to compress the field based on the spherical harmonic transformation (SHT) and rational interpolation. First, the tangential electric field over a sphere surrounding the antenna is obtained by simulation or measurement. Then, this field is converted into the spherical harmonic coefficients, which are sparse discrete spectra. Finally, these coefficients are interpolated over the whole frequency band with only a few sampling points. Numerical examples show that the proposed algorithm can compress the data of the near field of a rectangular waveguide antenna by about 17278 times, and those of the far field scattered from an UAV by about 103 times.

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Haobo Yuan was born in Tianmen, Hubei, China, in 1980. He received the B.S., M.S., and Ph.D. degrees in electromagnetic fields and microwave technology from Xidian University, Xi’an, China, in 2003, 2006, and 2009, respectively. Since 2006, he has been with the School of Electronic Engineering, Xidian University, where he is an Associate Professor. He was a post-doctoral researcher at the Ohio State University in 2019. His current research interests include computational electromagnetics, antenna measurements, and electromagnetic compatibility.

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Pu Yang was born in An’qing, Anhui, China, in 2000. He received the B.S. degree in electronic information engineering from Changchun University of Science and Technology, Changchun, China, in 2018. He is currently pursuing the M.S. degree with Xidian University. His research interests are numerical techniques in computational electromagnetics.

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Nannan Wang received the B.S. degree in electronic information engineering from Nanjing University of Information Science and Technology, Nanjing, China, in 2023. She is currently pursuing the M.Eng. degree with Xidian University. Her research interest is antenna measurement techniques.

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Yi Ren (Senior Member, IEEE) was born in Anhui, China, in 1982. He received the B.S. degree from Anhui University, Hefei, China, in 2004, and the Ph.D. degree from the University of Electronic Science and Technology of China (UESTC), Chengdu, China, in 2009. In 2009, he joined Chongqing Jinmei Inc., Chongqing, China, as an Electromagnetic Compatibility Engineer. In 2011, he joined the Chongqing University of Posts and Telecommunications (CQUPT), Chongqing, where he was lately promoted as Full Professor. From 2014 to 2015, he was a Post-Doctoral Research Scholar with Duke University, Durham, NC, USA. Since August 2020, he has been a Professor with Xidian University, Xi’an, China. His research interests include computational electromagnetics and electromagnetic compatibility.

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Shasha Li received the B.S. degree in electronic engineering from Northwestern Polytechnical University, Xi’an, China, in 2006. She received the Ph.D. degree in signal and information processing from Institute of Acoustics, Chinese Academy of Sciences (IACAS), Beijing, China, in 2012. Currently, she is an Engineer with Beijing Institute of Space Long March Vehicle, Beijing, China. Her current research interests include adaptive signal processing and array signal processing.

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已出版

2025-04-30

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[1]
H. . Yuan, P. . Yang, N. . Wang, Y. . Ren, 和 S. . Li, 《Compressing Electromagnetic Field by Rational Interpolation of the Spherical Wave Expansion Coefficients》, ACES Journal, 卷 40, 期 04, 页 317–325, 4月 2025.

期

2025: Vol 40 Iss 4

栏目

General Submission

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