Automatic generation of finite difference meshes by an evolutionary algorithm

Witting, Martin; Burkhardt, S.

doi:10.1109/20.497493

Cited by 5 publications

(4 citation statements)

References 7 publications

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“…The method starts with the definition of a generally rectangular mesh (with the choice of the step-sizes ∆x, ∆y and ∆z for the electric field and another staggered (by ∆x = 2, ∆y = 2 and ∆z = 2) grid for the magnetic field in the computational domain. The building blocks of this mesh are the so-called Yee-cells [10].…”

Section: Finite Difference Time Domain (Fdtd) Methodsmentioning

confidence: 99%

Power Density and SAR in Multi-Layered Life Tissue at Global System Mobile (GSM) Frequencies

Wasife¹

2011

JEMAA

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In this paper, the power density and specific absorption rat (SAR) distribution in multi-layered life tissues and exposed to electromagnetic field emitted from handheld cellular phone operating in the 900 MHz and 1800 MHz is studied. We modeled a life tissue by four layered system to represent skin-fat-muscles-organs respectively. Matlab program and finite difference time domain (FDTD) computations were used to evaluator the electric, magnetic field, power density and specific absorption rate. A one dimensional FDTD algorithm has been built, some simulations for electromagnetic wave through the life tissue is made. Results show that electro magnetic fields penetrate the life tissues and attenuate fast to reach zero at the organs layer. The absorbent power and SAR show maximum at the skin and fat layers

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Section: Finite Difference Time Domain (Fdtd) Methodsmentioning

confidence: 99%

Power Density and SAR in Multi-Layered Life Tissue at Global System Mobile (GSM) Frequencies

Wasife¹

2011

JEMAA

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“…Devices which have been designed by GA include monopole antennas, 11,12 antenna arrays, [13][14][15] antenna systems, 16 and electromagnetic device. 17,18 Also, GA has been successfully applied to natural resonance extraction, 19 scattering center analysis of radar targets, 20 generation of finite difference meshes, 21 and the design of perfectly matched layers for finite-difference frequency domain applications. 22 In particular, several studies for designing layered and dielectric filtering structures, 10,23 microwave absorbers, 12,24,25 and FSSs 12,26,27 have been demonstrated by using the GA.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of frequency selective surface by genetic algorithm

Shim

Lee

et al. 2010

Int. J. Precis. Eng. Manuf.

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In this paper, we describe an autonomous design procedure of frequency selective surface(FSS) with genetic algorithm(GA). With a set of characteristics specified by operators in frequency domain, the proposed system searches the best matching pre-manufactured FSS in the pre-constructed data base(DB), sets initial genes of GA with the searched FSS parameters, and then runs electromagnetic scattering theory on FSS as well as evolution process through GA until the solution settles down to the desired characteristics. DB implemented from manufactured real FSS is utilized as approximated solution set for GA. The system gives tolerable running time, and the results are verified by manufactured FSS.

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“…In the research reported, most of them were about two-dimensional mesh system generation [1][2][3], and more and more about three-dimensional mesh generation were reported in the recent years [4][5][6]. But most of them were about building up the mesh system of the blank, seldom were the reports about mesh generation of the stamping die.…”

Section: Introductionmentioning

confidence: 99%