Beam Forming Design of Anomalously Reflective Metasurface Based on Quantum Annealing

This paper presents a beam forming design of an anomalously reflective metasurface aimed at reflecting an incident wave into a specified angular range with uniform power distribution for coverage expansion applications of 6G communication. To address the enormous design degree of freedom of practical reflective metasurface designs, we introduce a quantum annealing (QA)-assisted design framework. We derive a formulation that can be applied to comprehensive design problems where the design parameters, reflection phases of elements constituting a metasurface, are arbitrarily discretized. To demonstrate the validity of the proposed design framework, we design a metasurface that reflects a normal incident wave to generate a reflected beam with a beamwidth of 30° spanning over reflection angles from -15° to 15° and discuss its optimization performance.