Analysis of Rapidly Twisted Hollow Waveguides

FD-TD analysis of bandwidth characteristics in the asymmetrical ridge rectangular waveguide

“…For a detailed account of the implementation of the FD-TD method for solution of homogeneous waveguide problems, a good reference is [8] [9].…”

“…The finitedifference time-domain (FDTD) method has been presented for analyzing the cutoff characteristics of some waveguides [8] [9]. In this paper, the FD-TD method is used to analyze the influence of the ridge position on the cutoff wavelength and bandwidth of the dominant mode in the ridge waveguide.…”

On the evaluation of quasi-periodic Green functions and wave-scattering at and around Rayleigh-Wood anomalies

“…Perhaps, in part, for these reasons, these type of configurations have received much less attention in the computational physics literature than their well-known bi-periodic relatives. The only d Λ = 1, d = 3 problems of which we are aware are computations of eigenmodes for twisted waveguides on the basis of either approximate models [41] or finite-difference methods in time-domain (FDTD) [53]. The contributions [11,29,46,51] consider linear arrays of spheres but they also focus on the study of guided modes in the periodic structure rather than the simulation of a wave-scattering process.…”

Multi-Mode Coupling Wave Theory for Helically Corrugated Waveguide

“…The price of using this technique is the uniform material properties in the twisted waveguide will become non-uniform and position dependent. This transformation method can greatly reduce the computing time in resolving the eigenwave dispersion when applying the FEM and FDTD methods in the 2-D geometries [16], [17]. It should be noted that the dispersions of the coupled waves and those initial partial waves are all existing and calculated at the same time when this method is used.…”