Full Wave Modeling of RF Propagation Between Low-to-the-Ground Antennas

Wu, Kai; Schuster, J.; Luebbers, R.

doi:10.1109/aps.2005.1552114

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…The propagation characteristics are studied as functions of the mountain's gradient, height, and width, respectively [23]. FDTD-based propagation model solves Maxwell's equation directly using centered finite difference method [24]. For propagation over distances less than 100 mi, the field intensity follows the theoretical inverse distance law for ground waves over a perfect ground plane.…”

Section: Terrain Analysismentioning

confidence: 99%

Multiple Signal Source Terrain Topography Determination using Labview VI Algorithm

2019

IJRTE

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To apply the knowledge in hardware and software integration, as well as utilizing the NI LabVIEW and NI myDAQ signal acquisition attribute. The aim of this research paper is to provide a solution for determining the type of land topograhy through the detection of incoming multiple groundwave signals from different oscillation sources. Aside from source determination and notification, the user will also be able to visualize, analyze, and classify the type of the incoming signal which depends upon its response as it passes through an indefinite terrain. The system will be using Low Frequency (LF) ground-wave oscillations. This paper deals with the concern using the finite-difference time-domain (FDTD) of topographic terrain identification through soil conductivity and creating a virtual instrument (vi) that will execute a determination algorithm. The LabVIEW program that will be implemented is multiplatform, it will be able to support different versions of LabVIEW depending on the program availability and to support real-time targets

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Section: Terrain Analysismentioning

confidence: 99%

Multiple Signal Source Terrain Topography Determination using Labview VI Algorithm

2019

IJRTE

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“…In [8], Bannister and Dube employed the finitely conducting earth-image theory technique to calculate the near fields for a subsurface horizontal electric dipole. Wu et al used the moving window finite-difference time-domain (FDTD) technique to calculate the propagation of EM signals near the ground surface from UHF antennas located slightly above the ground [9]. In [10] Bourlier et al used an improved scheme of the method-of-moments method to calculate ground wave propagation above smooth and rough sea surfaces in the HF-VHF band.…”

Section: Introductionmentioning

confidence: 99%

Wave Propagation Between Buried Antennas

Kesar¹,

Weiss²

2013

IEEE Trans. Antennas Propagat.

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Buried antennas can be used in a variety of applications. For surface communication, parameters such as the ground conductivity and the depth of the buried antenna affect the channel attenuation between the antennas. A buried conical antenna for surface communication was developed at Soreq NRC. The antenna is axis-symmetric with two metallic plates, where the upper plate is conical and the lower is a flat disc. The wave propagation from the buried antenna is studied using an axis-symmetric finite-difference time-domain approach. It was found that the energy is radiated from the buried antenna to above the ground, where it forms a spherical surface wave. Due to the wave propagating above the ground faster than below the ground, the penetration of the surface wave into the ground is shaped as a shock wakefield. This wakefield is absorbed into the ground due to the finite ground conductivity. The shock wavefront corresponds to the Cherenkov angle , where is the ground relative dielectric permittivity. The channel attenuation from the buried antenna to a receiving antenna located either above or below the ground surface scales as . Experimental demonstration was performed at 900 MHz. A good correlation was obtained for the channel attenuation between the experimental and simulation results, irrespective of whether the receiving antenna was located above or below the ground surface.Index Terms-Buried antennas, communication channels, finitedifference time-domain (FDTD) methods, shock waves.

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Full Wave Modeling of RF Propagation Between Low-to-the-Ground Antennas

Cited by 2 publications

References 4 publications

Multiple Signal Source Terrain Topography Determination using Labview VI Algorithm

Multiple Signal Source Terrain Topography Determination using Labview VI Algorithm

Wave Propagation Between Buried Antennas

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