642 citations · 3.2k across the 96 of their papers we have counts for
6 papers · 2 filters
Perfect Dispersive Medium
Shulabh Gupta, Christophe Caloz
Dispersion lies at the heart of real-time signal processing systems across the entire electromagnetic spectrum from radio to optics. However, the performance and applicability of s…
Synthesis of Electromagnetic Metasurfaces: Principles and Illustrations
Karim Achouri, Bakthiar Ali Khan, Shulabh Gupta +3
The paper presents partial overview of the mathematical synthesis and the physical realization of metasurfaces, and related illustrative examples. The synthesis consists in determi…
Metasurface Spatial Processor for Electromagnetic Remote Control
Karim Achouri, Guillaume Lavigne, Mohamed Ahmed Salem +1
We introduce the concept of metasurface spatial processor, whose transmission is remotely and coherently controlled by the superposition of an incident wave and a control wave thro…
Loss-Gain Equalized Reconfigurable Phaser for Dynamic Radio Analog Signal Processing (R-ASP)
Lianfeng Zou, Shulabh Gupta, Christophe Caloz
We present a loss-gain equalized reconfigurable phaser for dynamic radio analog signal processing (R-ASP). Such a phaser provides real-time tunable group delay response with all-pa…
Space-Time Cross-Mapping and Application to Wave Scattering
Mohamed A. Salem, Christophe Caloz
Causality creates an asymmetry between space and time, even though the wave equation treats them on equal footing. In this work, we leverage this asymmetry to construct a cross-map…
Single-Step Tunable Group Delay Phaser for Real-Time Spectrum Sniffing
Tongfeng Guo, Qingfeng Zhang, Yifan Chen +2
This paper presents a single-step tunable group delay phaser for spectrum sniffing. This device may be seen as a "time filter", where frequencies are suppressed by time separation…