Effect of the Inner Shape on the Scattering Cross-Section of an Aperture on an Electrically Large High-Q Cavity

Authors

  • Feng Tian College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
  • Feng Fang College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
  • Bo Peng Beijing Institute of Radio Metrology and Measurement Beijing 100854, China
  • Yongjiu Zhao College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
  • Qian Xu College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

DOI:

https://doi.org/10.13052/2025.ACES.J.401206

Keywords:

Cavity scattering, Monte Carlo simulation, scattering cross-section

Abstract

This paper presents the effect of the inner shape on the statistical properties of the scattering cross-section of an aperture on a high-Q cavity. By combining the full-wave method and Monte Carlo simulations, the mean scattered far-field pattern of the aperture on a high-Q cavity can be obtained accurately. We show that the cosine roll-off distribution for the scattered far-field pattern is only an approximation for ideal cases, while the thickness and the inner shape of the aperture can affect the scattered far-field pattern significantly. Different models are used to demonstrate this phenomenon and the results are compared against the ideal cosine roll-off.

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Author Biographies

Feng Tian, College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

Feng Tian received the B.Eng. degree from University of Electronic Science and Technology of China, Chengdu, China, in 2008, and received M.Eng. degree from CETC 14th Institute, Nanjing, in 2011. He is currently a Ph.D. student at the College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, China. His research interests include power amplifier, EMC, and antennas.

Feng Fang, College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

Feng Fang received the B.Eng. and M.Eng. degrees in microwave technology from the Nanjing University of Aeronautics and Astronautics, Nanjing, China, in 2020 and 2023, respectively. He is currently working toward the Ph.D. degree in electromagnetic field and microwave technology from Nanjing University of Aeronautics and Astronautics. His main research interests include patch antenna, antenna array, reverberation chamber, computational electromagnetics and statistical electromagnetics, Over-the-Air (OTA) testing and electromagnetic compatibility (EMC).

Bo Peng, Beijing Institute of Radio Metrology and Measurement Beijing 100854, China

Bo Peng received the master’s degree in physical electronics from the Institute of Electrics, Chinese Academy of Sciences, Beijing, China, in 2012. He is currently with the Beijing Institute of Radio Metrology and Measurement, Beijing. His research interests mainly include electromagnetic field and microwave technology.

Yongjiu Zhao, College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

Yongjiu Zhao received the M.Eng. and Ph.D. degrees in electronic engineering from Xidian University, Xi’an, China, in 1990 and 1998, respectively. Since March 1990, he has been with the Department of Mechano-Electronic Engineering, Xidian University, where he was a professor in 2004. From December 1999 to August 2000, he was a Research Associate with the Department of Electronic Engineering, The Chinese University of Hong Kong. His research interests include antenna design, microwave filter design, and electromagnetic theory.

Qian Xu, College of Electronic and Information Engineering Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

Qian Xu received the B.Eng. and M.Eng. degrees in electrical engineering and electronics from the Department of Electronics and Information, Northwestern Polytechnical University, Xi’an, China, in 2007 and 2010, and the Ph.D. degree in electrical engineering from the University of Liverpool, UK, in 2016. He was as an RF engineer in Nanjing, in 2011, an Application Engineer with CST Company, Shanghai, in 2012. He is currently an Associate Professor with the College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing. His work at University of Liverpool was sponsored by Rainford EMC Systems Ltd (now part of Microwave Vision Group) and Centre for Global Eco-Innovation. He has designed many chambers for the industry and has authored the book Anechoic and Reverberation Chambers: Theory, Design, and Measurements (Wiley-IEEE, 2019). His research interests include statistical electromagnetics, reverberation chamber, EMC, and over-the-air testing.

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Published

2025-12-30

How to Cite

[1]
F. . Tian, F. . Fang, B. . Peng, Y. . Zhao, and Q. . Xu, “Effect of the Inner Shape on the Scattering Cross-Section of an Aperture on an Electrically Large High-Q Cavity”, ACES Journal, vol. 40, no. 12, pp. 1186–1197, Dec. 2025.

Issue

2025: Vol 40 Iss 12

Section

General Submission

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