Study of Forward and Backward Modes in Double-Sided Dielectric-Filled Corrugated Waveguides
This work studies the propagation characteristics of a rectangular waveguide with aligned/misaligned double-sided dielectric-filled metallic corrugations. Two modes are found to propagate in the proposed double-sided configuration below the hollow-waveguide cutoff frequency: a quasi-resonant mode an...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-09-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/18/6293 |
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| author | Pilar Castillo-Tapia Francisco Mesa Alexander Yakovlev Guido Valerio Oscar Quevedo-Teruel |
| author_facet | Pilar Castillo-Tapia Francisco Mesa Alexander Yakovlev Guido Valerio Oscar Quevedo-Teruel |
| author_sort | Pilar Castillo-Tapia |
| collection | DOAJ |
| description | This work studies the propagation characteristics of a rectangular waveguide with aligned/misaligned double-sided dielectric-filled metallic corrugations. Two modes are found to propagate in the proposed double-sided configuration below the hollow-waveguide cutoff frequency: a quasi-resonant mode and a backward mode. This is in contrast to the single-sided configuration, which only allows for backward propagation. Moreover, the double-sided configuration can be of interest for waveguide miniaturization on account of the broader band of its backward mode. The width of the stopband between the quasi-resonant and backward modes can be controlled by the misalignment of the top and bottom corrugations, being null for the glide-symmetric case. The previous study is complemented with numerical results showing the impact of the height of the corrugations, as well as the filling dielectric permittivity, on the bandwidth and location of the appearing negative-effective-permeability band. The multi-modal transmission-matrix method has also been employed to estimate the rejection level and material losses in the structure and to determine which port modes are associated with the quasi-resonant and backward modes. Finally, it is shown that glide symmetry can advantageously be used to reduce the dispersion and broadens the operating band of the modes. |
| first_indexed | 2024-03-10T07:13:35Z |
| format | Article |
| id | doaj.art-837ed3a6d2bc4354bef88d29f7933e38 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T07:13:35Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-837ed3a6d2bc4354bef88d29f7933e382023-11-22T15:14:38ZengMDPI AGSensors1424-82202021-09-012118629310.3390/s21186293Study of Forward and Backward Modes in Double-Sided Dielectric-Filled Corrugated WaveguidesPilar Castillo-Tapia0Francisco Mesa1Alexander Yakovlev2Guido Valerio3Oscar Quevedo-Teruel4Division of Electromagnetic Engineering, KTH Royal Institute of Technology, 114 28 Stockholm, SwedenDepartment of Applied Physics 1, E.T.S. de Ingeniería Informática, University of Seville, 41012 Seville, SpainDepartment of Electrical and Computer Engineering, The University of Mississippi, Oxford, MS 38677, USALaboratoire de Génie Electrique et Electronique de Paris, CNRS, Sorbonne Université, 75252 Paris, FranceDivision of Electromagnetic Engineering, KTH Royal Institute of Technology, 114 28 Stockholm, SwedenThis work studies the propagation characteristics of a rectangular waveguide with aligned/misaligned double-sided dielectric-filled metallic corrugations. Two modes are found to propagate in the proposed double-sided configuration below the hollow-waveguide cutoff frequency: a quasi-resonant mode and a backward mode. This is in contrast to the single-sided configuration, which only allows for backward propagation. Moreover, the double-sided configuration can be of interest for waveguide miniaturization on account of the broader band of its backward mode. The width of the stopband between the quasi-resonant and backward modes can be controlled by the misalignment of the top and bottom corrugations, being null for the glide-symmetric case. The previous study is complemented with numerical results showing the impact of the height of the corrugations, as well as the filling dielectric permittivity, on the bandwidth and location of the appearing negative-effective-permeability band. The multi-modal transmission-matrix method has also been employed to estimate the rejection level and material losses in the structure and to determine which port modes are associated with the quasi-resonant and backward modes. Finally, it is shown that glide symmetry can advantageously be used to reduce the dispersion and broadens the operating band of the modes.https://www.mdpi.com/1424-8220/21/18/6293corrugated waveguideglide symmetryhigher symmetriesBloch analysis |
| spellingShingle | Pilar Castillo-Tapia Francisco Mesa Alexander Yakovlev Guido Valerio Oscar Quevedo-Teruel Study of Forward and Backward Modes in Double-Sided Dielectric-Filled Corrugated Waveguides Sensors corrugated waveguide glide symmetry higher symmetries Bloch analysis |
| title | Study of Forward and Backward Modes in Double-Sided Dielectric-Filled Corrugated Waveguides |
| title_full | Study of Forward and Backward Modes in Double-Sided Dielectric-Filled Corrugated Waveguides |
| title_fullStr | Study of Forward and Backward Modes in Double-Sided Dielectric-Filled Corrugated Waveguides |
| title_full_unstemmed | Study of Forward and Backward Modes in Double-Sided Dielectric-Filled Corrugated Waveguides |
| title_short | Study of Forward and Backward Modes in Double-Sided Dielectric-Filled Corrugated Waveguides |
| title_sort | study of forward and backward modes in double sided dielectric filled corrugated waveguides |
| topic | corrugated waveguide glide symmetry higher symmetries Bloch analysis |
| url | https://www.mdpi.com/1424-8220/21/18/6293 |
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