11 papers
Robust Beamforming for Cell-Free Systems with Parallel-Plate-Waveguided Dynamic Metasurfaces
Konstantinos D. Katsanos, Panagiotis Gavriilidis, George C. Alexandropoulos
Dynamic Metasurface Antennas (DMAs) constitute a promising solution for extremely large antenna arrays, requiring lower power consumption and reduced hardware cost as compared to c…
A Near-Field Compatible Model for 2D Waveguide-Fed Metasurfaces
Panagiotis Gavriilidis, George C. Alexandropoulos
This paper presents a novel physically consistent analytical model for two-dimensional (2D) waveguide-fed metasurface antennas that is based on the discrete dipole approximation. T…
Near-Field Beam Focusing Characterization for 2D Waveguide-Fed Metasurface Antennas
Panagiotis Gavriilidis, George C. Alexandropoulos
Two-dimensional (2D) waveguide-fed metasurfaces enable scalable antenna apertures through guided wave excitation of distributed radiating elements. However, the resulting non-unifo…
2D Waveguide-Fed Metasurfaces: Physically Consistent Modeling, Validation, and Optimization
Panagiotis Gavriilidis, George C. Alexandropoulos
Antenna array architectures based on programmable metasurfaces are emerging as a promising solution for scalable implementations of the eXtremely Large Multiple-Input Multiple-Outp…
Sensing-Aided Near-Field Beam Tracking
Panagiotis Gavriilidis, George C. Alexandropoulos
The interplay between large antenna apertures and high carrier frequencies in future wireless systems gives rise to near-field communications, where the curvature of spherical wave…
2D Waveguide-Fed Metasurface Antenna Arrays: Modeling and Optimization for Bistatic Sensing
Ioannis Gavras, Panagiotis Gavriilidis, George C. Alexandropoulos
This paper presents a physics-consistent framework for bistatic sensing incorporating a 2-Dimensional (2D) waveguide-fed metasurface antenna array capable of realizing eXtremely-La…