A Hybrid Time-Domain Technique That Combines the Finite Element, Finite Difference and Method of Moment Techniques to Solve Complex Electromagnetic Problems

Monorchio, Agostino; Bretones, A.R.; Mittra, R.; Manara, Giuliano; Martin, R.G.

doi:10.1109/tap.2004.834431

Cited by 44 publications

(28 citation statements)

References 37 publications

(36 reference statements)

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“…The TDIE/FDTD method and the FDTD/FETD/TDIE method have been proposed for complex electromagnetic problems [9,10]. Discontinuous Galerkin Time-Domain (DGTD) method [11][12][13][14][15] inherits from Finite Element Time-Domain (FETD) the advantage of unstructured grids without solving large linear systems.…”

Section: The Hybrid Methodsmentioning

confidence: 99%

Time-Domain Analytical Expression for Near Fields of Arbitrarily Oriented Electric Dipole and Its Application

Yang

Wei

et al. 2017

International Journal of Antennas and Propagation

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The near fields of electric dipole are commonly used in wide-band analysis of complex electromagnetic problems. In this paper, we propose new near field time-domain expressions for electric dipole. The analytical expressions for the frequency-domain of arbitrarily oriented electric dipole are given at first; next we give the time-domain expressions by time-frequency transformation. The proposed expressions are used in hybrid TDIE/DGTD method for analysis of circular antenna with radome. The accuracy of the proposed algorithm is verified by numerical examples.

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Section: The Hybrid Methodsmentioning

confidence: 99%

Time-Domain Analytical Expression for Near Fields of Arbitrarily Oriented Electric Dipole and Its Application

Yang

Wei

et al. 2017

International Journal of Antennas and Propagation

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“…In 2004, a new hybrid method brought together the FDTD, finite-element timedomain (FETD) and method of moments time-domain (MoMTD) methods to analyze problems of thin-wire antennas radiating in the vicinity of arbitrarily-shaped inhomogeneous bodies [22]. From [23], stair case errors [24] from FDTD can be mitigated by using a finite element method (FEM), but this method requires high computational resources.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Computational Scheme for Antenna-Human Body Interaction

Ramli¹,

Abd‐Alhameed²,

See³

et al. 2013

PIER

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Abstract-A new hybrid method of moments (MoM)/finite-difference time-domain (FDTD), with a sub-gridded finite-difference timedomain (SGFDTD) approach is presented. The method overcomes the drawbacks of homogeneous MoM and FDTD simulations, and so permits accurate analysis of realistic applications. As a demonstration, it is applied to the short-range interaction between an inhomogeneous human body and a small UHF RFID antenna tag, operating at 900 MHz. Near-field and far-field performance for the antenna are assessed for different placements over the body. The cumulative distribution function of the radiation efficiency and the absorbed power are presented and analyzed. The algorithm has a five-fold speed advantage over fine-gridded FDTD.

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“…In the area of antenna design several researchers have numerically modelled, and studied the performance and characteristics of their own custom-built GPR antennas (van Coevorden et al, 2006;Huang et al, 1999;Lestari et al, 2004Lestari et al, , 2005Monorchio et al, 2004;Shlager et al, 1994;Uduwawala and Norgren, 2006). Their antennas were planar or wire bowties, and loaded by discrete resistors or electromagnetic absorber material.…”

Section: Introductionmentioning

confidence: 99%

Creating finite-difference time-domain models of commercial ground-penetrating radar antennas using Taguchi’s optimization method

2011

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Very few researchers have developed numerical models of Ground-Penetrating Radar (GPR) that include realistic descriptions of both the antennas and the subsurface. This is essential to be able to accurately predict responses from near-surface, near-field targets. This paper presents detailed three-dimensional (3D) Finite-Difference Time-Domain (FDTD) models of two commercial GPR antennas-a Geophysical Survey Systems, Inc. (GSSI) 1.5 GHz antenna and a MALÅ Geoscience 1.2 GHz antenna-developed using simple analyses of the geometries and the main components of the antennas. Values for unknown parameters in the antenna models (due to commercial sensitivity) were estimated by using Taguchi's optimisation method, resulting in a good match between the real and modelled crosstalk responses in free-space. Validation using a series of oil-in-water emulsions to simulate the electrical properties of real materials demonstrated that it was essential to accurately model the permittivity and dispersive conductivity. When accurate descriptions of the emulsions were combined with the antenna models the simulated responses showed very good agreement with real data. This provides confidence for use of the antenna models in more advanced studies.

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A Hybrid Time-Domain Technique That Combines the Finite Element, Finite Difference and Method of Moment Techniques to Solve Complex Electromagnetic Problems

Abstract: Abstract-This paper describes a hybrid technique directly operating in time domain

Cited by 44 publications

References 37 publications

Time-Domain Analytical Expression for Near Fields of Arbitrarily Oriented Electric Dipole and Its Application

Time-Domain Analytical Expression for Near Fields of Arbitrarily Oriented Electric Dipole and Its Application

Hybrid Computational Scheme for Antenna-Human Body Interaction

Creating finite-difference time-domain models of commercial ground-penetrating radar antennas using Taguchi’s optimization method

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