Analysis of Transmission Characteristics of EBG Structures by Subgridding Unconditionally Stable FETD Method

Authors

  • Yixin Wang School of Physics, Xidian University, Xi’an, 710071, China
  • Bing Wei School of Physics, Xidian University, Xi’an, 710071, China
  • Kaihang Fan School of Information and Communications Engineering, Xi’an Jiaotong University, Xi’an, 710049, China

DOI:

https://doi.org/10.13052/2022.ACES.J.370901

Keywords:

Electromagnetic bandgap (EBG), finite-element time-domain (FETD), Floquet theorem, spatial modes filtering, subgridding technology

Abstract

Subgridding unconditionally-stable finite-element time-domain method based on spatial modes filtering (SSMF-FETD) is combined with the Floquet theorem and used to analyze the transmission characteristics of 2-D dielectric pillar-array electromagnetic bandgap (EBG) structures with cross-section shapes of square and H. The computational stress is effectively reduced by exploiting the periodicity of the EBG structure and subgridding technique. Through the spatial modes filtering (SMF) method, the subgridding FETD (S-FETD) method is developed into the SSMF-FETD with larger time steps and higher computational efficiency. The effect of geometric and electromagnetic parameters on transmission characteristics of EBG structures are analyzed and compared in detail, the conclusions are as follows: the optimal filling ratio of the dielectric square-pillar EBG structure is 0.5, the composite H-pillar EBG structure has multiple bandgaps and can effectively save metal materials while satisfying the design requirements. The effect of electromagnetic parameters can be uniformly analyzed from the perspective of the average relative permittivity; with its increase, the central frequency of the bandgap becomes lower. It should be noted that the bandgap distribution and variation of composite H-pillar EBG structure are related to how its dielectric parameters change and combine. The results can serve as a reference for similar structures design.

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Author Biographies

Yixin Wang, School of Physics, Xidian University, Xi’an, 710071, China

Yixin Wang was born in Xi’an, Shaanxi, China, in 1995. She received her B.S. degree in Electromagnetic Wave Propagation And Antennas from Xidian University, Xi’an, China, in 2017. She is currently pursuing a Ph.D. degree in Radio Science at the School of Physics, Xidian University. Her current research interests include the finite element time-domain method and its related methods.

Bing Wei, School of Physics, Xidian University, Xi’an, 710071, China

Bing Wei was born in Tianshui, Gansu, China, in 1970. He received a B.S. degree in Physics from Beijing Normal University, Beijing, China, in 1993, and a Ph.D. degree in Radio Science from Xidian University, Xi’an, China, in 2004. From 1993 to 1998, he was a Physics professor at Tianshui Normal University, Tianshui, China. From 1998 to 1999, he was a Physics professor at Baoji University of Arts and Science, Baoji, China. Since 2004, he was been with Xidian University. Currently, he is also a professor at Xidian University. His research interests include investigations of electromagnetic field theory, numerical field computation, and short pulse interactions on complex objects.

Kaihang Fan, School of Information and Communications Engineering, Xi’an Jiaotong University, Xi’an, 710049, China

Kaihang Fan was born in Linfen, Shanxi, China, in 1990. She received a B.S. degree in Electronic Information Science And Technology and a Ph.D. degree in Radio Science from Xidian University, Xi’an, China, in 2014 and 2021, respectively. She is currently working as a postdoctoral researcher at the School of Information and Communications Engineering, Xi’an Jiaotong University, Xi’an, China. Her current research interests include the finite element time-domain method and the multiphysics problem.

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Published

2022-09-30

How to Cite

[1]
Y. . Wang, B. . Wei, and K. . Fan, “Analysis of Transmission Characteristics of EBG Structures by Subgridding Unconditionally Stable FETD Method”, ACES Journal, vol. 37, no. 09, pp. 921–932, Sep. 2022.

Issue

2022: Vol 37 Iss 9

Section

General Submission

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