Broadband wide-angle terahertz antenna based on the application of transformation optics to a Luneburg lens
Yasith Amarasinghe, Rajind Mendis, Rabi Shrestha, Hichem Guerboukha, Jochen Taiber, Martín Koch, Daniel M. Mittleman
Abstract
The design of antennas for terahertz systems remains a significant challenge. These antennas must provide very high gain to overcome significant free-space path loss, which limits their ability to broadcast or receive a beam over a wide angular range. To circumvent this limitation, here we describe a new device concept, based on the application of quasi-conformal transformation optics to the traditional Luneburg lens. This device offers the possibility for wide-angle beam steering and beam reception over a broad bandwidth, scalable to any frequency band in the THz range.
Topics & Concepts
Luneburg lensTerahertz radiationOpticsBroadbandTransformation opticsBandwidth (computing)PhysicsComputer scienceLens (geology)Achromatic lensBeam steeringOptoelectronicsBeam (structure)MetamaterialTelecommunicationsRefractive indexMetamaterials and Metasurfaces ApplicationsAdvanced Antenna and Metasurface TechnologiesMicrowave Engineering and Waveguides