Broadband slot array antenna with full‐space steerable pattern in a composite right/left‐handed waveguide

Abstract

[1] The aim of this paper is twofold. On the one hand, to provide a better understanding of a composite right/left-handed (CRLH) waveguide, going into those aspects of interest for an antenna designer. A longitudinal slot as a radiating element has been considered to be studied and compared with its classic counterpart. On the other hand, to present the new design approach that is needed when using the CRLH waveguide technology to built array antennas. To that end, a slot array antenna has been designed, built, and measured. The simulations and measurements are in excellent agreement, confirming not only the backward-to-forward beam steering and broadband far-field performance, but also the validity of the design procedure used.Citation: Navarro-Tapia, M., J. Esteban, and C. Camacho-Peñalosa (2013), Broadband slot array antenna with full-space steerable pattern in a composite right/left-handed waveguide, Radio Sci., 48,[406][407][408][409][410][411][412][413][414][415]

Study of Forward and Backward Modes in Double-Sided Dielectric-Filled Corrugated Waveguides

“…In order to overcome these drawbacks, several studies adding metasurfaces have been conducted in order to allow for backward modes, which can propagate below the cut-off frequency [ 2 , 3 , 4 , 5 ]. In [ 6 , 7 , 8 , 9 ], it was demonstrated that a hollow waveguide with dielectric-filled periodic corrugations on the bottom wall allows the propagation of backward modes. Among other possible applications, this characteristic was advantageously employed in [ 6 , 7 ] to build slot-array antennas.…”

“…In [ 6 , 7 , 8 , 9 ], it was demonstrated that a hollow waveguide with dielectric-filled periodic corrugations on the bottom wall allows the propagation of backward modes. Among other possible applications, this characteristic was advantageously employed in [ 6 , 7 ] to build slot-array antennas. Corrugated waveguides have also been proposed for sensing electric and magnetic fields [ 10 ], as well as temperature in the THz regime [ 11 ].…”

Bandwidth improvement of planar antennas using a single-layer metamaterial substrate for X-band application

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