Coupling Analysis in Concentric Ring Waveguides

Torres, João Paulo N.; Baptista, António; Machado, V. Maló

doi:10.1109/jlt.2013.2263633

Cited by 12 publications

(12 citation statements)

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“…The main objective of this section is the validation of the new HFEM method. This section is divided into three subsections: in the first one, the electromagnetic wave propagation in a disk waveguide was considered, and the results were compared with RFEM method results [18]; in the second and third ones the electromagnetic wave propagation in an infinite height ring waveguide and in a finite height ring waveguide was considered, and the results were compared with the results of an analytical model presented by Marcatili [22] and, in the third case, also with an analytical model presented by Torres [23].The HFEM and the RFEM were implemented using a set of routines encoded in the "Mathematica" language.…”

Section: Results and Hfem Validationmentioning

confidence: 99%

“…The validation of the method was done through a comparative analysis of the HFEM results with other analytical and numerical methods, for typical configurations described in the literature, namely with the RFEM method results and the analytical results of Marcatili [22], and Torres [23].…”

Section: Discussionmentioning

confidence: 99%

“…The Discrete Fourier Transform (DFT) is now used, by discretizing (22) and (23). Considering the fictitious boundary, discretized with N e equidistant points, the following DFT, in normalized form, is obtained:…”

Section: Hybrid Methods (Hfem)mentioning

confidence: 99%

“…To this end, using the HFEM and the RFEM methods, we simulate the wave propagation in a cylindrical waveguide, similar to Marcatili structure, figure 1, but with a finite height. Then, we compare the simulation results with those obtained from the analytical models of Marcatili [22] and Torres [23]. The model developed by Torres is a generalization of the Marcatili model.…”

Section: Electromagnetic Wave Propagation In a Tube Waveguidementioning

confidence: 99%

“…The discretization was performed according to the Delaunay triangulation method [21] showing important advantages in the number of nodes compared with uniform node distribution strategies for the same accuracy. The results were validated by comparison with the analytical results of Marcatilli [22] and the analytical model of Torres [23]. Once the method was validated, the effect of the waveguide geometrical configuration in the curvature losses, considering 2 nd order basis functions, was also analyzed, through the inspection of the propagation constant.…”

Section: Introductionmentioning

confidence: 99%

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A new hybrid finite element method (HFEM) was developed, using basis functions of first and second order, to analyse the electromagnetic wave propagation in three types of waveguides: disk waveguides, ring waveguides and cylindrical waveguides. For validation purposes, results obtained with the HFEM method were compared with those obtained with a recursive finite element method (RFEM) and with two different analytical methods. The domain discretization effect on the results of the new HFEM method was examined using either a uniform distribution of nodes or a Delaunay distribution method. The results show that the Delaunay method, used in the mesh definition, is important, not only to assure the reliability of the method but also to significantly reduce the computation time and memory consumption. Also, the influence of the distance between the fictitious boundary and the waveguide core was analysed showing an important effect on the result numerical accuracy. In conclusion, results show that the new hybrid finite element method presented has a significant advantage on calculation time over the recursive finite element method.

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Section: Results and Hfem Validationmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%