2026-04-28T19:34:34Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/813652026-03-26T11:57:15Zcom_10324_1148com_10324_931com_10324_894col_10324_1270

Pseudospectral frequency‐domain analysis of rectangular waveguides filled by dielectrics whose permittivity varies continuously along the broad dimension Pereda, José A Grande Sáez, Ana María Producción Científica The calculation of dispersion diagrams and field patterns of metallic rectangular waveguides filled with an inhomogeneous dielectric whose permittivity varies continuously along the broad size of the guide is considered. In general, this problem has no exact solution, thus numerical techniques should be used. In this article, the pseudospectral frequency-domain (PSFD) method is proposed to address the problem. Starting from the Helmholtz equation, a matrix eigenvalue problem is obtained by applying the collocation technique with Chebyshev polynomials as basis functions. The results obtained are compared with those calculated by the conventional finite-difference frequency-domain method showing that the PSFD technique provides an excellent accuracy. 2026-01-12T15:21:01Z 2026-01-12T15:21:01Z 2020 info:eu-repo/semantics/article Microwave and Optical Technology Letters, 2020, vol. 9, p. 2830-2834 0895-2477 https://uvadoc.uva.es/handle/10324/81365 10.1002/mop.32390 2830 9 2834 Microwave and Optical Technology Letters 62 1098-2760 eng https://onlinelibrary.wiley.com/doi/10.1002/mop.32390 info:eu-repo/semantics/restrictedAccess John Wiley & Sons, Inc John Wiley and Sons Inc. SI