Low Frequency Fields Excited by a Horizontal Magnetic Dipole Near Boundary of lossy Half-Space

Peng, Huaiyun; Yu, Chen; Wang, Yuanxin; Zhang, Shi-Tian; Mao, Yun-Zhi

doi:10.1109/isape.2018.8634107

Cited by 4 publications

(4 citation statements)

References 5 publications

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“…To validate the effectiveness of the derived formulas, the values of magnitudes for the magnetic field component H 0ϕ are plotted in Fig. 2 by various comparable results, in which the discrete measured data are taken from a recent near-field experiment released in [13] conducted by Chinese researcher and the rest curve lines are obtained by analytical formulas by using the NBS's formula in [1] with the radiating radius is taken as…”

Section: Computationmentioning

confidence: 99%

“…This experiment data are taken from recorded in literature [13], in which the conductivity is measured as 0.…”

Section: A Near-field Calibrationsmentioning

confidence: 99%

“…Applications of some lower RFID bands are usually found for instrument calibrations, such as the Low Frequency (LF, 120 − 150 kHz) band in [7]- [9] and High Frequency (HF, at center frequency of 13.56 MHz) band in [10]- [12], respectively. From a direct inter-comparison of experimental measurement with analytical results by Chinese researchers in [13], the authors have claimed the importance to obtain more accurate formulas, rather than segmented expressions as defined for various "quasi-static" distance ranges, to express the near-field strength decaying in some calibration systems.…”

Section: Introductionmentioning

confidence: 99%

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

Xu¹,

Zhu²,

Wei³

et al. 2020

IEEE Access

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The Sommerfeld Integrals (SIs) are re-visited in the presence of half-spaces under the assumption of γ 0 ≈ 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.

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Section: Computationmentioning

confidence: 99%

“…This experiment data are taken from recorded in literature [13], in which the conductivity is measured as 0.…”

Section: A Near-field Calibrationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Xu¹,

Zhu²,

Wei³

et al. 2020

IEEE Access

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show abstract

“…The study proposed the use of the MacLaurin expansion method to derive an analytical solution for the near-field of the seafloor under quasi-static approximation conditions. Peng (2018) [30] discussed the calculation of the electric field radiated by a horizontal magnetic dipole (HMD) antenna into a lossy half-space, simulating it as a two-layer medium. The study derived a set of EMF expressions composed of Sommerfeld-type integrals under quasi-static magnetic field conditions.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Electromagnetic Fields of Extremely Low-Frequency Horizontal Electric Dipoles at Sea–Air Boundaries

Hu,

Xie,

2023

Electronics

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The technologies of undersea detection and communication, seabed sensor networks, and geophysical detection using electromagnetic waves have emerged as research focal points within the field of marine science and engineering. However, most studies have focused on the propagation of electromagnetic fields over long distances within the shallow “sea-seabed” environment. This paper introduces a quasi-static approximation method to address the Sommerfeld numerical integration challenge within the near-field region, employing the horizontal electric dipole (HED) as a model. It derives the Sommerfeld numerical integral expressions under conditions where the wave-number ratio at the “seawater-air” boundary does not adhere to the requirement of |k0/k1| << 1 (where subscripts 0 and 1 denote seawater and air media, respectively). Building upon this, the paper simplifies the Bessel-Fourier infinite integral term within the integral expression to obtain Sommerfeld numerical integral approximations for the propagation of electromagnetic fields in the near region of extremely low frequency (ELF) within seawater. The study further conducts simulations and calculations to determine amplitude variations in electromagnetic field intensity generated by an ELF HED at different frequencies, dipole heights, and observation point depths. It concludes with an analysis of electromagnetic field propagation characteristics at the seawater-air boundary. Experimental findings highlight the lateral wave as the primary mode of electromagnetic wave propagation at this interface.

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VLF Near-field of Radio Wave Penetrating Into A Ground Medium

Xu¹,

Yin²,

2020

2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)

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Low Frequency Fields Excited by a Horizontal Magnetic Dipole Near Boundary of lossy Half-Space

Cited by 4 publications

References 5 publications

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

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

Evaluation of Electromagnetic Fields of Extremely Low-Frequency Horizontal Electric Dipoles at Sea–Air Boundaries

VLF Near-field of Radio Wave Penetrating Into A Ground Medium

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