Waveguide filters with multiple passbands and stopbands achieved by bed of nails implanted within sidewall dielectric loadings

Mou-Kehn Ng, Eva Rajo-Iglesias, Oscar Quevedo-Teruel

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Lately, there had been keen explorations into a new type of novel waveguide that enjoys, over a wide bandwidth, the desirable trait of having only one TEM mode propagating along just the direction of a metallic rectangular ridge embossed onto a wall of a parallel-plate waveguide and existing only within the resultant ridge-gap, achieved by a textured high-impedance surface surrounding the ridge which suppresses the propagation of global TEM modes along all other directions. Referred to as gap-waveguides [1], a typical bandgap structure that has been used is the so-called bed-of-nails comprising simply an array of grounded metallic pins [2]. Motivated by the broadband nature of such high-impedance surfaces, it could hence also be interesting and worthwhile to investigate how such a pin-lattice, when implanted within the sidewall dielectric slab-loadings of a rectangular waveguide, could affect the bandgap properties. An asymptotic treatment of this pin-lattice loaded waveguide is proposed, through the use of classical analysis by vector potentials and assuming a "TEM-to-slab-surface-normal" solution inside the pin-lattice layer. Hence, the approach is plausible only within the premise of diminishingly small pin-periods, i.e. the spatial density of the pins tends to infinity. Nevertheless, this method provides extremely rapid analysis processes as compared to full-wave solvers, which is vital for design and optimization procedures.

Original languageEnglish
Title of host publication2010 14th International Symposium on Antenna Technology and Applied Electromagnetics and the American Electromagnetics Conference, ANTEM/AMEREM 2010
DOIs
StatePublished - 11 Oct 2010
Event2010 14th International Symposium on Antenna Technology and Applied Electromagnetics and the American Electromagnetics Conference, ANTEM/AMEREM 2010 - Ottawa, ON, Canada
Duration: 5 Jul 20108 Jul 2010

Publication series

Name2010 14th International Symposium on Antenna Technology and Applied Electromagnetics and the American Electromagnetics Conference, ANTEM/AMEREM 2010

Conference

Conference2010 14th International Symposium on Antenna Technology and Applied Electromagnetics and the American Electromagnetics Conference, ANTEM/AMEREM 2010
CountryCanada
CityOttawa, ON
Period5/07/108/07/10

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