Abstract
A simple scheme for the realization of the terahertz (THz) fundamental-mode closed-stopband composite right/left-handed leaky-wave antennas (CRLH LWAs) is presented. The proposed CRLH LWAs are reconstructed by graphene-based coplanar waveguide (CPW) transmission line supercells. Their shunt inductances achieved by narrow graphene strips of two unit cell structures are halved. The CRLH LWAs are designed and confirmed by numerical simulations. They also exhibit frequency-scannable behaviors at THz with narrower bandwidth than that of the conventional graphene-based fundamental-mode CPW unit cell CRLH LWAs at THz without stopbands. Therefore, the proposed supercell CRLH LWAs could further improve the performance of the beam-steering antennas at THz.
Highlights
With the rapid development of the transmission rates of wireless communication, radar, and satellite systems, terahertz (THz) antenna technology is a hot research area [1]
The proposed supercell LWAs would further improve the performance of beam-steering antennas at THz
The proposed supercell CRLH LWAs are developed by graphene metamaterial
Summary
With the rapid development of the transmission rates of wireless communication, radar, and satellite systems, terahertz (THz) antenna technology is a hot research area [1]. Graphene-based coplanar waveguide (CPW) technology could be applied for the development of the conventional CRLH LWAs at THz for their simple structure. The conventional graphene-based CPW unit cell CRLH LWAs cannot completely close the stopband. The implementation of the graphene-based CPW supercell technology is supposed to realize the CRLH LWAs at THz with closed-stopbands [8]. The graphene-based CPW supercells are reconstructed to achieve the narrow-band CRLH leaky-wave structures as Fig. 1(a) shows. The proposed supercell LWAs would further improve the performance of beam-steering antennas at THz
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