Thin wire dipoles—a finite-difference time-domain approach

Boonzaaier, J.J.; Pistorius, C.W.I.

doi:10.1049/el:19901217

Cited by 18 publications

(9 citation statements)

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“…The source used to excite the modes in the chamber is thought to be a thin wire dipole modeled as described in [19]. In that study, the near field physics of such a problem are included by assuming that the tangential electric field component on the dipole is zero except for the dipole's gap, where an appropriate excitation waveform is applied.…”

Section: Virc Modeling Methodsmentioning

confidence: 99%

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FDTD Modeling of a Vibrating Intrinsic Reverberation Chamber

Kouveliotis¹,

Trakadas²,

Capsalis³

2003

PIER

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Abstract-The field conditions inside a vibrating intrinsic reverberation chamber (VIRC) are examined. By the use of the Finite Difference Time Domain (FDTD) method, the field strength in the VIRC is calculated, and an investigation of the field uniformity and the field distribution is performed. The modes inside the cavity are excited by applying an appropriately modulated waveform on a dipoles gap. The use of this kind of waveform enables the study of the field conditions over a wide frequency range. On the contrary, an implementation of the field excitation with an unmodulated carrier would require a simulation of the FDTD method at each frequency of interest. Thus, a considerable reduction in the simulation time is achieved. The results presented, describing the field behavior inside the enclosure, agree with theory to a high degree.

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Section: Virc Modeling Methodsmentioning

confidence: 99%

“…Additionally, the field components near the dipole are calculated using the contour integral interpretations of Maxwell's equations [10]. Thus, for example the H y component is expressed as follows [19]:…”

Section: Virc Modeling Methodsmentioning

confidence: 99%

FDTD Modeling of a Vibrating Intrinsic Reverberation Chamber

Kouveliotis¹,

Trakadas²,

Capsalis³

2003

PIER

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“…Although the finite-difference time-domain (FD-TD) method has been applied to electromagnetic scattering problems [ 1, 21, it has been expanded to include the radiation by thin-wire dipoles [ 3 ] . For antenna problems the excitation source is located on or near the scattering elements and the total-and scattered-field boundary present for scattering problems must be removed.…”

Section: Problem Formulationmentioning

confidence: 99%

“…Assuming a delta gap source model, the voltage difference at the terminals of the dipole will give rise to a z-directed electric field in the source region. The modified time stepping expression for the circumferential magnetic field in the source region is given by [3] + where the Ell F(n 6t) term represents the amplitude and form of the excitation waveform. The excitation term can be placed inside or outside the brackets by the appropriate choice of E,,.…”

Section: Problem Formulationmentioning

confidence: 99%

Thin‐wire Yagi antenna radiation patterns using the finite‐difference time‐domain method

Boonzaaler¹,

Pistorius²

1991

Micro & Optical Tech Letters

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“…The merit of FDTD simulation is that quantitative analysis of realistic antenna geometry is possible without assuming any current distribution on antenna surface (e.g., [39] and [40]). By using the FDTD method with the plasma fluid approximation, we can analyze the antenna impedance in plasmas (e.g., [41]).…”

Section: A Introductionmentioning

confidence: 99%

Development and Application of Geospace Environment Simulator for the Analysis of Spacecraft–Plasma Interactions

Usui

Miyake

Okada

et al. 2006

IEEE Trans. Plasma Sci.

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Space development has been rapidly increasing, and a strong demand should arise regarding the understanding of the spacecraft-plasma interactions, which is one of the very important issues associated with the human activities in space. To evaluate the spacecraft-plasma interactions including plasma kinetics, transient process, and electromagnetic field variation, the authors have started to develop a numerical plasma chamber called Geospace Environment Simulator (GES) by making the most use of the conventional full particle-in-cell plasma simulations. For the development of a proto model of GES, the authors have used the Earth Simulator, which is one of the fastest supercomputers in the world. GES can be regarded as a numerical chamber in which space experiments can be virtually performed and temporal and spatial evolutions of spacecraft-plasma interactions can be analyzed. In this paper, the authors have briefly introduced GES in terms of its concept, modeling, and research targets. As one of the research topics of GES, the authors have investigated the impedance variation of electric field antenna onboard scientific satellites in the photoelectron environment in space. From the preliminary simulation results, the large change of reactance of the antenna impedance below the characteristic frequency corresponding to the local plasma frequency determined by the photoelectron density could be confirmed.

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Thin wire dipoles—a finite-difference time-domain approach

Cited by 18 publications

References 0 publications

FDTD Modeling of a Vibrating Intrinsic Reverberation Chamber

FDTD Modeling of a Vibrating Intrinsic Reverberation Chamber

Thin‐wire Yagi antenna radiation patterns using the finite‐difference time‐domain method

Development and Application of Geospace Environment Simulator for the Analysis of Spacecraft–Plasma Interactions

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