Barnard, WihanOdendaal, J.W. (Johann Wilhelm)Joubert, Johan2023-10-042023-10-042023-02Barnard, W., Odendaal, J.W. & Joubert J. 2023, 'Anomalous reflection from a phase gradient metasurface with arbitrary incident angle', IEEE Access, vol. 11, pp. 18385-18390, doi : 10.1109/ACCESS.2023.3246503.2169-3536 (online)10.1109/ACCESS.2023.3246503http://hdl.handle.net/2263/92681A planar phase gradient metasurface (PGM) with phase gradients in two in-plane directions will introduce two additional wave vectors to the reflected wave vector. For small incident angles, close to the normal vector, the magnitude of the reflected wave vector is smaller than that of the incident wave vector and the direction of the anomalous reflected wave can be determined from the incident wave vector components and additional phase gradient components. The expanded generalized Snell’s law, which includes diffraction order modes, is combined with array theory to accurately predict the directions of the reflected waves from a planar PGM for incident angles where the magnitude of the reflected wave vector is larger than that of the incident wave vector. The predicted directions of the reflected waves from a planar PGM are compared with simulated RCS results obtained with CST Studio Suite and measured results obtained in a compact range.en© 2023. The Authors. Licensee IEEE: This work is licensed under a Creative Commons Attribution 4.0 License. https://creativecommons.org/licenses/by/4.0.Bistatic radarElectromagnetic metamaterialsElectromagnetic reflectionPhase gradient metasurface (PGM)Radar cross-section (RCS)Article