A mode-matching solution for the study of cylindrical waveguide bifurcation via closed-form coupling integrals

Lima, André Luiz dos Santos; Rosa, Guilherme S.; Bergmann, J.R.

doi:10.1016/j.aeue.2020.153135

Cited by 6 publications

(5 citation statements)

References 19 publications

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“…Also, all waveguides are filled with vacuum and are radially truncated by PECs. The mode-matching coupling integrals we have used to computing the reaction integrals ( 6) and ( 7) are available in closed-forms in [14], [20], [22], [25], [26] and will not be repeated here. In what follows, we will compare the results of the present approach with those obtained by a frequency-domain finite-element method (FEM) from CST [27].…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…The present matrix formulation also allows a straightforward model to waveguide terminations by just updating some sub-matrices of the GSM formalism, without requiring the redefinition of eigenfunction in such cavity-backed scenarios. This characteristic confers an advantage upon the method in [20] and others found in the specialized MMT literature [4], [11], [18], [19]. In short, the major contribution of this work is the formulation of a matrix-friendly GSM representation of multifurcated waveguide junctions that can recycle the coupling integrals of two-port devices that are already known in the MMT literature.…”

Section: Introductionmentioning

confidence: 99%

“…Our formulation relates the coupling integrals directly with the unified scattering matrix. The present method can be seen as a generalization of the MMT solution in [20], where particular bifurcated waveguide junctions were analyzed, namely, geometries with two input waveguides connected to one output waveguide. In the present notation, this corresponds to a total of N = 3 waveguides.…”

Section: Introductionmentioning

confidence: 99%

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A Novel Mode-Matching Formulation of Multifurcated Waveguide Junctions

Rosa

2021

J. Microw. Optoelectron. Electromagn. Appl.

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In this paper, we present a mode-matching-based formulation for the electromagnetic analysis of multifurcated waveguide problems, that is, the junction of a number of input waveguides with an output region of larger cross-section area. A generalized scattering matrix (GSM) representation is obtained for relating the forward and backward modal field amplitudes in each of the waveguides in terms of coupling integrals representing the conservation of the reaction of the electromagnetic fields. Numerical results for several multifurcated coaxial waveguide devices are provided to validate the formulation. Comparisons against the finite-element method demonstrate that the present approach can accurately model multifurcated waveguide problems. The method introduced here provides useful matrix formulas that allow us to model multi-port waveguide devices by reusing well-known coupling integrals of two-port problems.

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Section: Numerical Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Novel Mode-Matching Formulation of Multifurcated Waveguide Junctions

Rosa

2021

J. Microw. Optoelectron. Electromagn. Appl.

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“…Lima analyzed electromagnetic waves in a circular waveguide using the mode matching method. The circular waveguide was divided into each sub-domain, and the S-parameter was calculated by constructing a matrix by obtaining the boundary conditions on the coupling plane [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Intentional Electromagnetic Interference on GENEC Model Using Cylindrical Mode Matching

Kang

Lee

et al. 2023

Sensors

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In recent times, due to the high operating frequency and low operating voltage of modern electronic devices, intended electromagnetic interference (IEMI) has been the cause of increasing damage. In particular, targets with precision electronics such as aircrafts or missiles have shown that a high-power microwave (HPM) may cause malfunction or partial destruction of the GPS or the avionic control system. Analysis of the effects of IEMI requires electromagnetic numerical analyses. However, there are limitations to conventional numerical techniques, such as the finite element method, method of moment, or finite difference time domain method, due to the complexity and large electrical length of a real target system. In this paper, we proposed a new cylindrical mode matching (CMM) technique to analyze IEMI of the generic missile (GENEC) model, which is a hollow metal cylinder with multiple apertures. Using the CMM, we can quickly analyze the effect of the IEMI inside the GENEC model from 1.7 to 2.5 GHz. The results were compared with those of the measurements and, for verification, with the FEKO, a commercial software program developed by Altair Engineering, and showed good agreement. In this paper, the electro-optic (EO) probe was used to measure the electric field inside the GENEC model.

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“…A normalization of the GSM will be used to make it independent of the fields amplitudes. The normalized matrix is given by [78,81]…”

Section: Cascading Generalized Scattering Matricesmentioning

confidence: 99%

Electromagnetic Characterization of Inhomogeneous Cylindrical Waveguides Using Mode-Matching-Based Methods

COSENZA¹

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A mode-matching solution for the study of cylindrical waveguide bifurcation via closed-form coupling integrals

Cited by 6 publications

References 19 publications

A Novel Mode-Matching Formulation of Multifurcated Waveguide Junctions

A Novel Mode-Matching Formulation of Multifurcated Waveguide Junctions

Analysis of Intentional Electromagnetic Interference on GENEC Model Using Cylindrical Mode Matching

Electromagnetic Characterization of Inhomogeneous Cylindrical Waveguides Using Mode-Matching-Based Methods

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