Propagation Constant of a Rectangular Waveguides Completely Full of Ferrite Magnetized Longitudinally

Sakli, Hèdi; Benzina, Hafedh; Aguili, Taoufik; Tao, Junwu

doi:10.1007/s10762-009-9505-7

Cited by 7 publications

(7 citation statements)

References 17 publications

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“…The dispersion characteristic of the dominant quasi-TE 10 mode of this waveguide are shown in Fig. 2; good agreement with those are presented in [7]. Table I shows a comparison between the different algorithms (in addition to the usual algorithm based on the Polder tensor) in terms of code complexity, CPU time, and memory space required for the simulation of this small waveguide.…”

Section: Numerical Resultssupporting

confidence: 74%

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Alternative Formulations of the Fields’ Constitutive Relations for the Efficiency of the Time Domain Analysis of Magnetized Ferrites

Benouatas

2015

IEEE Trans. Magn.

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In this paper, the constitutive relation of longitudinally magnetized ferrites (LMF) is simplified and transformed to an equivalent relation involving tensors with first-order dispersive components more suitable for use in the time domain analysis. Further treatment leads to a diagonal permeability tensor that yields approximating formulas to relate the magnetic field to the magnetic flux density, which allows eliminating this later and reducing the number of field variables involved. Later, a similar result is achieved using a variable transformation. This reveals that magnetized ferrites actually have a permeability tensor simpler than the Polder tensor, in addition to a permittivity tensor with first-order dispersive components, which contradicts the known theory about ferrites. Finally, it is shown that the results obtained for the LMF case could be extended to the transversely magnetized ferrite case and to the general case of arbitrary state of magnetization. Some examples are presented with numerical results to validate the proposed formulations. Index Terms-Dispersion, finite-difference time domain (FDTD), gyromagnetic resonance, magnetized ferrites, Polder tensor.0018-9464

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Section: Numerical Resultssupporting

confidence: 74%

“…Many frequency-domain numerical methods have been applied for the analysis of ferrite structures [5]- [7]. Recently, due to the progress made in time-domain methods that allowed the integration of dispersive materials [8], ferrite structures were at the center of researchers' interest.…”

Section: Introductionmentioning

confidence: 99%

Alternative Formulations of the Fields’ Constitutive Relations for the Efficiency of the Time Domain Analysis of Magnetized Ferrites

Benouatas

2015

IEEE Trans. Magn.

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“…By considering the propagation according to direction OZ and by eliminating the longitudinal components from the electromagnetic field, we can get a new formulation in terms of two transverse magnetic components [10]…”

Section: Discussionmentioning

confidence: 99%

“…However, the analytical study of the electromagnetic wave propagation in guides partially charged with longitudinally magnetized ferrite presents an appreciable lack and finds difficulties due to the anisotropy of the medium and the coupling of the electromagnetic fields in the equation of propagation [4][5][6][7][8][9][10]. In this article, we present a thorough study of the TOM applied to the case of the anisotropic mediums by considering a tensorial representation of the permeability of ferrite.…”

Section: Introductionmentioning

confidence: 99%

Complex Mode in Rectangular Waveguide Filled With Longitudinally Magnetized Ferrite Slab

Benzina¹,

Sakli²,

Aguili³

et al. 2010

PIER M

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Abstract-In microwaves, ferrites are characterized by a tensorial permeability which represents their anisotropy under a constant magnetic field. We present, in this article, a rigorous study of the formulation of the transverse operator method (TOM) with an extension to the case of the guides of rectangular waves partially charged with longitudinally magnetized ferrite. We show the existence of the complex modes in these types of structures with ferrite. A good agreement of the constant of propagation with the literature is obtained.

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“…In this paper, we present an extension of the transverse operator method (TOM) [11] to the rectangular waveguides filled periodically with anisotropic metamaterial (Figure 1). We exploit the propagation modes in this structure.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic wave propagation in anisotropic metamaterial waveguides

Fathallah

Sakli

Aguili

2014

Int J Numerical Modelling

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In this paper, we present the formalism of the transverse operator method (TOM). A rigorous study of propagation in anisotropic and multi-layer medium using the tensor character of the permeability and permittivity is presented. With the application of the Galerkin method, the propagating modes in metallic rectangular waveguides filled with anisotropic metamaterial are exploited. The results are compared with those previously published and show a good agreement. The complex modes have been obtained.The advantages of the techniques used in this paper lie in the proper analytical formulation of the problem studied, on the one hand, and the speed of convergence, on the other hand. TOM offers a fast convergence of the propagation constant. This shows the effectiveness of our numerical model. As such, the formulation of the transverse operator could be a useful tool for microwave engineers. This type of materials known as metamaterial is widely used and needed by industries and information technology, especially in microwave and radiofrequency devices such as patch antennas, antennas waveguides, resonators, circulators, isolators, phase shifters, and filters.

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Propagation Constant of a Rectangular Waveguides Completely Full of Ferrite Magnetized Longitudinally

Cited by 7 publications

References 17 publications

Alternative Formulations of the Fields’ Constitutive Relations for the Efficiency of the Time Domain Analysis of Magnetized Ferrites

Alternative Formulations of the Fields’ Constitutive Relations for the Efficiency of the Time Domain Analysis of Magnetized Ferrites

Complex Mode in Rectangular Waveguide Filled With Longitudinally Magnetized Ferrite Slab

Electromagnetic wave propagation in anisotropic metamaterial waveguides

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