50 citations · 69 across the 4 of their papers we have counts for
4 papers
Investigating Sparse Reconfigurable Intelligent Surfaces (SRIS) via Maximum Power Transfer Efficiency Method Based on Convex Relaxation
Hans-Dieter Lang, Michel A. Nyffenegger, Heinz Mathis +1
Reconfigurable intelligent surfaces (RISs) are widely considered to become an integral part of future wireless communication systems. Various methodologies exist to design such sur…
Computation of High-Order Electromagnetic Field Derivatives with FDTD and the Complex-Step Derivative Approximation
Kae-An Liu, Hans-Dieter Lang, Costas D. Sarris
This paper introduces a new approach for the computation of electromagnetic field derivatives, up to any order, with respect to the material and geometric parameters of a given geo…
Optimization of Wireless Power Transfer Systems Enhanced by Passive Elements and Metasurfaces
Hans-Dieter Lang, Costas D. Sarris
This paper presents a rigorous optimization technique for wireless power transfer (WPT) systems enhanced by passive elements, ranging from simple reflectors and intermedi- ate rela…
Semidefinite Relaxation-Based Optimization of Multiple-Input Wireless Power Transfer Systems
Hans-Dieter Lang, Costas D. Sarris
An optimization procedure for multi-transmitter (MISO) wireless power transfer (WPT) systems based on tight semidefinite relaxation (SDR) is presented. This method ensures physical…