Reduction of Electromagnetic Reflections in 3D Airborne Transient Electromagnetic Modeling: Application of the CFS-PML in Source-Free Media
Joint Authors
Ji, Yanju
Li, Dongsheng
Zhao, Xuejiao
Gu, Jiayue
Guan, Shanshan
Source
International Journal of Antennas and Propagation
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-14, 14 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-09-12
Country of Publication
Egypt
No. of Pages
14
Main Subjects
Abstract EN
To solve the problem of electromagnetic reflections caused by the termination of finite-difference time-domain (FDTD) grids, we apply the complex frequency-shifted perfectly matched layer (CFS-PML) to airborne transient electromagnetic (ATEM) modeling in a source-free medium.
To implement the CFS-PML, two important aspects are improved.
First, our method adopts the source-free Maxwell’s equations as the governing equations and introduces the divergence condition, consequently, the discrete form of Maxwell’s third equation is derived with regard to the CFS-PML form.
Second, because our method adopts an inhomogeneous time-step, a recursive formula composed of convolution items based on a nonuniform time-step is proposed.
The proposed approach is verified via a calculation of the electromagnetic response using homogeneous half-space models with different conductivities.
The results show that the CFS-PML can reduce a 60 dB relative errors in late times.
Moreover, this approach is also applied to 3D anomalous models; the results indicate that the proposed method can reduce reflections and substantially improve the identification of anomalous bodies.
Consequently, the CFS-PML has good implications for ATEM modeling in a source-free medium.
American Psychological Association (APA)
Ji, Yanju& Zhao, Xuejiao& Gu, Jiayue& Li, Dongsheng& Guan, Shanshan. 2018. Reduction of Electromagnetic Reflections in 3D Airborne Transient Electromagnetic Modeling: Application of the CFS-PML in Source-Free Media. International Journal of Antennas and Propagation،Vol. 2018, no. 2018, pp.1-14.
https://search.emarefa.net/detail/BIM-1168221
Modern Language Association (MLA)
Ji, Yanju…[et al.]. Reduction of Electromagnetic Reflections in 3D Airborne Transient Electromagnetic Modeling: Application of the CFS-PML in Source-Free Media. International Journal of Antennas and Propagation No. 2018 (2018), pp.1-14.
https://search.emarefa.net/detail/BIM-1168221
American Medical Association (AMA)
Ji, Yanju& Zhao, Xuejiao& Gu, Jiayue& Li, Dongsheng& Guan, Shanshan. Reduction of Electromagnetic Reflections in 3D Airborne Transient Electromagnetic Modeling: Application of the CFS-PML in Source-Free Media. International Journal of Antennas and Propagation. 2018. Vol. 2018, no. 2018, pp.1-14.
https://search.emarefa.net/detail/BIM-1168221
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1168221