4 papers
Measurement of Liquid Water Content in Snow from Density-Insensitive Microwave Attenuation
Marco Niederberger, Sebastian Droz, Shaarujan Kamalanathan +3
A measurement principle for determining liquid water content (LWC) in snow is presented that does not require a priori knowledge or separate measurement of snow density. LWC affect…
Reducing Simulation Effort for RIS Optimization using an Efficient Far-Field Approximation
Hans-Dieter Lang, Michel A. Nyffenegger, Heinz Mathis +1
Optimization of Reconfigurable Intelligent Surfaces (RIS) via a previously introduced method is effective, but time-consuming, because multiport impedance or scatter matrices are r…
Validating Convex Optimization of Reconfigurable Intelligent Surfaces via Measurements
Hans-Dieter Lang, Michel A. Nyffenegger, Sven Keller +4
Reconfigurable Intelligent Surfaces (RISs) can be designed in various ways. A previously proposed semidefinite relaxation-based optimization method for maximizing power transfer ef…
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…