A Method of Moments Approach for the Simulation of Truncated RIS

Abazi, Adam;Cavillot, Jean;Craeye, Christophe
(2025) 2025 19th European Conference on Antennas and Propagation (EuCAP) — Location: Stockholm, Sweden (30.March.2025)

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Abstract
A Method of Moments (MoM) approach for truncated Reflective Intelligent Surface (RIS) is proposed. The response of the truncated RIS is obtained as the sum of a term that includes only the grounded slab and a term with the response of the metallization on the same slab. The first term is truncated to the dimensions of the finite RIS based on a Physical Optics (PO) approximation. This approach is validated analytically and numerically in the case of a finite metallic plate on the grounded substrate. Besides, an analysis methodology for RIS made of printed parallel strips is developed assuming a structure infinite in one direction and is validated using a full 3D MoM code for a RIS finite in both directions.
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Abazi, A., Cavillot, J., & Craeye, C. (2025). A Method of Moments Approach for the Simulation of Truncated RIS. 2025 19th European Conference on Antennas and Propagation (EuCAP), 1-4. https://doi.org/10.23919/EuCAP63536.2025.10999857 (Original work published 2025)