Local Metamaterial-Based Waveguides in Gaps Between Parallel Metal Plates

This letter presents a new metamaterial-based waveguide technology referred to as ridge gap waveguides. The main advantages of the ridge gap waveguides compared to hollow waveguides are that they are planar and much cheaper to manufacture, in particular at high frequencies such as for millimeter and...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters Vol. 8; pp. 84 - 87
Main Authors: Kildal, P.-S., Alfonso, E., Valero-Nogueira, A., Rajo-Iglesias, E.
Format: Journal Article
Language:English
Published: New York IEEE 2009
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Gap waveguides
Hollow waveguides
Magnetic resonance
Metal plates
metamaterials
Microstrip
Millimeter wave technology
Millimeter waves
Packaging
Planar waveguides
Ridges
submillimeter waves
Surface layer
Surface texture
Surface waves
Texture
Wave propagation
Waveguide components
Waveguide discontinuities
Waveguides
ISSN:1536-1225, 1548-5757, 1548-5757
Online Access:Get full text
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Summary:This letter presents a new metamaterial-based waveguide technology referred to as ridge gap waveguides. The main advantages of the ridge gap waveguides compared to hollow waveguides are that they are planar and much cheaper to manufacture, in particular at high frequencies such as for millimeter and sub- millimeter waves. The latter is due to the fact that there are no mechanical joints across which electric currents must float. The gap waveguides have lower losses than microstrip lines, and they are completely shielded by metal so no additional packaging is needed, in contrast to the severe packaging problems associated with microstrip circuits. The gap waveguides are realized in a narrow gap between two parallel metal plates by using a texture or multilayer structure on one of the surfaces. The waves follow metal ridges in the textured surface. All wave propagation in other directions is prohibited (in cutoff) by realizing a high surface impedance (ideally a perfect magnetic conductor) in the textured surface at both sides of all ridges. Thereby, cavity resonances do not appear either within the band of operation. The present letter introduces the gap waveguide and presents some initial simulated results.
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ISSN:1536-1225
1548-5757
1548-5757
DOI:10.1109/LAWP.2008.2011147