On the behavior of the LOD-FDTD method at dielectric interfaces

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URI: http://hdl.handle.net/10902/15706
ISSN: 1531-1309
ISSN: 1558-1764
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Autoría
Pereda Fernández, José AntonioAutoridad Unican; Grande Sáez, Ana María
Fecha
2018-06
Derechos
© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Publicado en
IEEE Microwave and Wireless Components Letters, 2018, 28(6), 461-463
Editorial
Institute of Electrical and Electronics Engineers Inc.
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Palabras clave
Locally one-dimensional finite-difference time-domain (LODFDTD) method
Alternating-direction implicit finite-difference time-domain (ADIFDTD) method
Resumen/Abstract
The electric field computed by the locally 1-D finite-difference time-domain (FDTD) method at dielectric interfaces is investigated. To this end, two comprehensive problems are considered, namely a dielectric step in a rectangular waveguide and a dielectric-loaded metallic cavity. We found that, in both problems, the electric field patterns exhibit an unexpected phase shift at the dielectric interface. By contrast, the alternating-direction implicit FDTD method does not present this unphysical behavior.
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