Cut-off bandwidth of metamaterial-based parallel plate gap waveguide with one textured metal pin surface

Conference: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
03/23/2009 - 03/27/2009 at Berlin, Germany

Proceedings: EuCAP 2009

Pages: 4Language: englishTyp: PDF

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Rajo-Iglesias, Eva (Signal Theory and Communication Department, University Carlos III of Madrid, Avda Universidad, 30, 28911 Leganes, Madrid, Spain)
Kildal, Per-Simon (Signals and System Department, Chalmers University of Technology, Gothenburg, Sweden)

This work explores the possibilities of creating stop bands (or bandgaps) for TEM mode in parallel plate waveguides by using artificial surfaces in one of the plates. Particularly, as artificial surface a textured periodic surface made of metal pins has been selected. The present paper reports a parametric study of the “Fakir’s bed of nails” structure in terms of the size of the achieved bandgap when the structure is placed within a parallel plate waveguide. Bandwidths larger than 2:1 are seen to be possible. The proposed structure could be used for the design of the new type of waveguides named gap waveguides.