TLM-based modal-extraction approach for the investigation of discontinuities in the rectangular waveguide and the NRD

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dc.contributor.authorGhosh, B
dc.contributor.authorSimons, NRS
dc.contributor.authorShafai, L
dc.contributor.authorIttipiboon, A
dc.contributor.authorPetosa, A
dc.date.accessioned2007-10-03T12:32:27Z
dc.date.available2007-10-03T12:32:27Z
dc.date.issued2002-10-31T12:32:27Z
dc.description.abstractThis paper describes the development of a rigorous transmission-line matrix-based modal-extraction approach to analyze discontinuities in guided-wave structures in general, with particular attention to the nonradiative dielectric waveguide (NRD). The motivation for this paper arose from the need to ascertain the admittance of a slot in the ground plane of an NRD without relying on experimental data. These data enabled one to design an NRD-based slot array following the methodology of Malherbe, Matherbe et al., and Ghosh et al.. Previous work in this area relied on placing observation points sufficiently remote from the discontinuity in order to ensure the decay of scattered evanescent modes to appreciably low levels. The method discussed here obviates this requirement and allows the evaluation of generalized scattering-matrix coefficients arbitrarily close to the discontinuity, thus significantly reducing the computational overhead. Results pertaining to discontinuities in the NRD and the rectangular waveguide have been presented and shown to give good agreement with those in the literature and with measurements. The perfectly matched layer has been used as an absorbing boundary condition in our simulations. Finally, the results have been verified using the power-conservation and Poynting's theorems.en
dc.format.extent478844 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.citation0018-9480; IEEE TRANS MICROWAVE THEORY, OCT 2002, vol. 50, no. 10, p.2294 to 2304.en
dc.identifier.urihttp://hdl.handle.net/1993/2850
dc.language.isoengen_US
dc.rights©2002 IEEE. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Manitoba's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.en
dc.rightsrestricted accessen_US
dc.statusPeer revieweden
dc.subjectdiscontinuitiesen
dc.subjectmodal extractionen
dc.subjectNRDen
dc.subjectPMLen
dc.subjectTLMen
dc.subjectPERFECTLY MATCHED-LAYERen
dc.subjectDIELECTRIC WAVE-GUIDEen
dc.subjectSLOT ARRAYen
dc.subjectDESIGNen
dc.subjectCOMPONENTSen
dc.subjectDIAKOPTICSen
dc.titleTLM-based modal-extraction approach for the investigation of discontinuities in the rectangular waveguide and the NRDen
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