A study of the nonorthogonal FDTD method versus the conventional FDTD technique for computing resonant frequencies of cylindrical cavities

Harms, P.H.; Lee, J.-F.; Mittra, R.

doi:10.1109/22.127524

Cited by 77 publications

(30 citation statements)

References 5 publications

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“…This algorithm creates finite boundary grids that conform to geometric surfaces to accurately match detailed irregularities, while retaining the simplicity of the regular grids used in the conventional FDTD algorithm for the other parts of the three-dimensional domain. A detailed description of the conformal FDTD algorithm is provided in numerous literatures (Harms et al, 1992;Holland, 1993;Madsen and Ziolkowski, 1988). Holland (1993) discussed the disadvantages of the classic staircase FDTD algorithm that significantly hindered its practical applications.…”

Section: Introductionmentioning

confidence: 99%

Simulation model for moving food packages in microwave heating processes using conformal FDTD method

Chen

Tang

Liu

2008

Journal of Food Engineering

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Section: Introductionmentioning

confidence: 99%

Simulation model for moving food packages in microwave heating processes using conformal FDTD method

Chen

Tang

Liu

2008

Journal of Food Engineering

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“…Agreement is good with the errors not exceeding 5%. It can be seen that for the CPFDTD method, some modes are not seen when a 12 12 grid is used, and slightly higher errors occur for the simulation of a rectangular waveguide. The reason is that the singular points at the corners of the rectangle are not taken into account in the CPFDTD approach.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…Apart from the staircase approximation, there are three different commonly used types of the FDTD method which have been put forward to analyze electromagnetic structures with curved boundaries: The contour path algorithm [3]- [6], formulas in the curvilinear coordinate system [9], and the nonorthogonal FDTD method [7], [10]- [12]. In addition, the problem has also been addressed using a hybrid finite-volume finitedifference approach [13].…”

mentioning

confidence: 99%

Analyzing electromagnetic structures with curved boundaries on Cartesian FDTD meshes

Hao

Railton

1998

IEEE Trans. Microwave Theory Techn.

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“…A three dimensional non orthogonal FDTD method has been proposed in [17]. Time-domain processing and fast Fourier transform are needed to reduce the number of iterations.…”

Section: Introductionmentioning

confidence: 99%

A Novel and Accurate Method for Designing Dielectric Resonator Filter

Saliminejad¹,

Fard²

2008

PIER B

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Abstract-The Development of numerical techniques enables us toanalyze a large number of complex structures such as dielectric resonator (DR) filters and planar passive elements for coplanar monolithic microwave integrated circuits.As for DR filters, numerical analysis of these structure is highly intricate mostly because of their non-homogenous composition (dielectric constant of DR is greater than 80, dielectric constant of the maintainer is less than 2 and dielectric constant of the atmosphere is 1). Hence, numerical analysis of such a structure, either in time domain (TLM, FDTD and . . . ) or frequency domain (FE, moment, mode matching, boundary element, FD and . . . ) is both complex and time-consuming. From one hand, the non-homogenous structure and from the other hand, the high frequency of applications, demand high density meshing in order to achieve accurate response [1][2][3].The explained method in this paper enables us to design a Chebyshev band passes filter by coaxially placing high-Q TM 01δ dielectric resonators in a cutoff circular waveguide. In the presented work, discussions are made regarding high-Q resonators and interresonator coupling. It can be used for TE and TM modes of dielectric resonators. The advantages of such a method are simplicity and accuracy. Furthermore, this method is very quick in calculating resonant frequencies of a single dielectric resonator and coupling factor between two dielectric resonators. Compared with HFSS software, the total required time in this method is less than 1 percent. 294 Saliminejad and GhafourifardBased on the presented method, a DR filter is designed, implemented and fabricated and the results are provided. The fabricated filter has an exclusive feature, i.e., it contains no screw for frequency tuning and it gives out the desired result without a need to modification.

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A study of the nonorthogonal FDTD method versus the conventional FDTD technique for computing resonant frequencies of cylindrical cavities

Cited by 77 publications

References 5 publications

Simulation model for moving food packages in microwave heating processes using conformal FDTD method

Simulation model for moving food packages in microwave heating processes using conformal FDTD method

Analyzing electromagnetic structures with curved boundaries on Cartesian FDTD meshes

A Novel and Accurate Method for Designing Dielectric Resonator Filter

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