Attenuation in Rectangular Waveguides with Finite Conductivity Walls

We present a fundamental and accurate approach to compute the attenuation of electromagnetic waves propagating in rectangular waveguides with finite conductivity walls. The wavenumbers kx and ky in the x and y directions respectively, are obtained as roots of a set of transcendental equations derive...

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Váldodahkkit: Yeap, K, Tham, C, Yassin, G, Yeong, K
Materiálatiipa: Journal article
Giella:English
Almmustuhtton: 2011
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author Yeap, K
Tham, C
Yassin, G
Yeong, K
author_facet Yeap, K
Tham, C
Yassin, G
Yeong, K
author_sort Yeap, K
collection OXFORD
description We present a fundamental and accurate approach to compute the attenuation of electromagnetic waves propagating in rectangular waveguides with finite conductivity walls. The wavenumbers kx and ky in the x and y directions respectively, are obtained as roots of a set of transcendental equations derived by matching the tangential component of the electric field (E) and the magnetic field (H) at the surface of the waveguide walls. The electrical properties of the wall material are determined by the complex permittivity ε, permeability μ, and conductivity σ. We have examined the validity of our model by carrying out measurements on the loss arising from the fundamental TE10 mode near the cutoff frequency. We also found good agreement between our results and those obtained by others including Papadopoulos' perturbation method across a wide range of frequencies, in particular in the vicinity of cutoff. In the presence of degenerate modes however, our method gives higher losses, which we attribute to the coupling between modes as a result of dispersion.
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spelling oxford-uuid:0732c44d-2ef5-4a3a-b6fd-a9ad4081f1a62022-03-26T09:06:23ZAttenuation in Rectangular Waveguides with Finite Conductivity WallsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:0732c44d-2ef5-4a3a-b6fd-a9ad4081f1a6EnglishSymplectic Elements at Oxford2011Yeap, KTham, CYassin, GYeong, KWe present a fundamental and accurate approach to compute the attenuation of electromagnetic waves propagating in rectangular waveguides with finite conductivity walls. The wavenumbers kx and ky in the x and y directions respectively, are obtained as roots of a set of transcendental equations derived by matching the tangential component of the electric field (E) and the magnetic field (H) at the surface of the waveguide walls. The electrical properties of the wall material are determined by the complex permittivity ε, permeability μ, and conductivity σ. We have examined the validity of our model by carrying out measurements on the loss arising from the fundamental TE10 mode near the cutoff frequency. We also found good agreement between our results and those obtained by others including Papadopoulos' perturbation method across a wide range of frequencies, in particular in the vicinity of cutoff. In the presence of degenerate modes however, our method gives higher losses, which we attribute to the coupling between modes as a result of dispersion.
spellingShingle Yeap, K
Tham, C
Yassin, G
Yeong, K
Attenuation in Rectangular Waveguides with Finite Conductivity Walls
title Attenuation in Rectangular Waveguides with Finite Conductivity Walls
title_full Attenuation in Rectangular Waveguides with Finite Conductivity Walls
title_fullStr Attenuation in Rectangular Waveguides with Finite Conductivity Walls
title_full_unstemmed Attenuation in Rectangular Waveguides with Finite Conductivity Walls
title_short Attenuation in Rectangular Waveguides with Finite Conductivity Walls
title_sort attenuation in rectangular waveguides with finite conductivity walls
work_keys_str_mv AT yeapk attenuationinrectangularwaveguideswithfiniteconductivitywalls
AT thamc attenuationinrectangularwaveguideswithfiniteconductivitywalls
AT yassing attenuationinrectangularwaveguideswithfiniteconductivitywalls
AT yeongk attenuationinrectangularwaveguideswithfiniteconductivitywalls