11 papers
Wideband Sensing with Dynamic Metasurface Antennas under Realistic Phase Response Modeling
Ioannis Gavras, George C. Alexandropoulos
This paper investigates the impact of practical features of the emerging antenna array technology of Dynamic Metasurface Antennas (DMAs) when used for wideband sensing. By adopting…
Electromagnetics-Compliant Optimization of Dynamic Metasurface Antennas for Bistatic Sensing
Ioannis Gavras, George C. Alexandropoulos
Dynamic Metasurface Antennas (DMAs) are recently attracting considerable research interests due to their potential to enable low-cost, reconfigurable, and highly scalable antenna a…
RIS-Enabled Spoofing Against Adversary Sensing: CRB-Maximizing Design and Decoying Analysis
Ioannis Gavras, Giuseppe Thadeu Freitas de Abreu, George C. Alexandropoulos
This paper studies the capability of a Reconfigurable Intelligent Surface (RIS), when transparently covering a User Equipment (UE), to deceive an adversary monostatic radar system.…
RIS-Enabled Smart Wireless Environments: Fundamentals and Distributed Optimization
George C. Alexandropoulos, Kostantinos D. Katsanos, George Stamatelis +1
This chapter overviews the concept of Smart Wireless Environments (SWEs) motivated by the emerging technology of Reconfigurable Intelligent Surfaces (RISs). The operating principle…
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…
Hybrid RISs for Simultaneous Tunable Reflections and Sensing
George C. Alexandropoulos, Nir Shlezinger, Ioannis Gavras +1
The concept of smart wireless environments envisions dynamic programmable propagation of information-bearing signals through the deployment of Reconfigurable Intelligent Surfaces (…