An Inverted L-Shaped Multi-Layer Reconfigurable Intelligent Surface for THz Communications

Realizing the gains of reconfigurable intelligent surfaces (RISs) for terahertz (THz) frequencies requires the practical design of reconfigurable surfaces. In this paper, we propose the design of a compact reconfigurable surface composed of meta-materials equipped with a voltage-controlled tunable d...

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Bibliographic Details
Main Authors: Saab, Sandy, Surra, Shadi Abu, Xu, Gary, Heath, Robert
Format: Conference Proceeding
Language:English
Subjects:
Beam-steering
Beamforming
Computers
Dielectric constant
Dielectric substrates
Dielectrics
Frequency selective surface
Meta-materials
MIMO
Phased arrays
Reconfigurable Intelligent Surfaces
Reflective Intelligent Surfaces
Surface waves
THz
Wireless networks
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Summary:Realizing the gains of reconfigurable intelligent surfaces (RISs) for terahertz (THz) frequencies requires the practical design of reconfigurable surfaces. In this paper, we propose the design of a compact reconfigurable surface composed of meta-materials equipped with a voltage-controlled tunable dielectric substrate. We show that controlling the tunable dielectric substrate's dielectric properties is conducted by varying the voltage source at each unit cell. We show that the use of independent voltage sources at each unit surface introduces a linear and progressive phase variation to the reflected signal from the surface of the RIS. The reflection coefficient performance at each voltage level conveys the phase shifts for different dielectric constants. As a result, we derive the maximum beam-steering angle from the phase shifts to redirect the signal in the intended direction.
ISSN:2576-2303
DOI:10.1109/IEEECONF56349.2022.10052030