Analytical Formulas for Wave Propagation at Low Frequencies in Half-Spaces Due to a Horizontal Magnetic Dipole

IEEE Access

Tingting Gu¹  Yin Hong-Chen²  Liangsheng Li²  Yong Zhu²  Honglei Xu²  Xiao Wei² 

[1] Department of Information Science and Electronic Engineering, Innovative Institute of Electromagnetic Information and Electronic Engineering, Zhejiang University, Hangzhou, China;Science and Technology on Electromagnetic Scattering Laboratory, Beijing, China;

关键词: Half-space;    horizontal magnetic dipole;    low-frequency;    lossy medium;    Sommerfeld integrals;   

DOI  :  10.1109/ACCESS.2020.3040494

来源: DOAJ

【 摘 要 】

The Sommerfeld Integrals (SIs) are re-visited in the presence of half-spaces under the assumption of γ₀ ≈ iλ being valid for low-frequency propagation in order to investigate the near-field due to a Horizontal Magnetic Dipole (HMD). Analytical expressions are derived for the excited waves over a planar homogeneous conducting ground or sea surface, and a numerical Finite Element Method (FEM) approach is also exploited to validate its correctness and effectiveness. The proposed method is additionally verified by late released experimental data, and it is shown that the results for various simplified expressions qualitatively corroborate the conclusions found in published papers. The proposed formulas can be used as a valuable tool for the study of the properties of near-field propagations from a loop antenna.

【 授权许可】

Unknown