Single-Pixel Chaotic Cavity Bandwidth Control using Rotman Lens-Based Multiplexer/Demultiplexer

This paper presents the integration of a microwave multiplexer/demultiplexer based on a Rotman Lens, with a cavity-backed metasurface antenna, for the first time, which represents a key step towards achieving efficient and cost-effective channel characterisation at microwave frequencies. Converting wideband signals into multiple sub-band signals and distributing their computations to parallel processing units can enable high-performance characterisation with low-order computational complexities.