کنفرانس مهندسی برق ایران

صفحه اصلی / سی و چهارمین کنفرانس بین المللی مهندسی برق

Reconfigurable VO2-Based Metasurface for Dual- and Quad-Directional Beam Splitting for 6G Applications

نویسندگان :

Abolfazl Ghaemi¹ Mohammad Hossein Mohebbi² Ramin Akbari Maham³ Mohammad Ali Shameli⁴

1- دانشگاه صنعتی خواجه نصیرالدین طوسی 2- دانشگاه صنعتی خواجه نصیرالدین طوسی 3- دانشگاه صنعتی خواجه نصیرالدین طوسی 4- دانشگاه صنعتی خواجه نصیرالدین طوسی

کلمات کلیدی :

Six-generation of wireless systems،Millimeter waves،Beam Splitting،Metasurface،Reconfigurable structure،VO2

چکیده :

This paper presents a reconfigurable vanadium dioxide (VO₂)-based metasurface that enables two-way and four-way beam splitting at 100 GHz for sixth-generation (6G) wireless system applications. The proposed design employs a supercell composed of silicon resonators with a thermally switchable VO₂ layer, enabling dynamic, reversible control of the reflected wavefront. In the insulating state of VO₂, the metasurface generates two reflected beams at ±30° in a one-dimensional configuration, while a two-dimensional configuration produces four symmetric beams. When VO₂ transitions to the metallic state, the engineered phase gradient collapses, and the structure exhibits mirror-like specular reflection. Full-wave simulations based on the finite-difference frequency-domain (FDFD) method show close agreement with theoretical predictions. For the two-way configuration, the main-to-side-lobe difference reaches 7.51 dB in the insulating state and 10.42 dB in the metallic state. In addition, the four-way configuration achieves corresponding values of 7 dB and 12.65 dB for the insulating and metallic, respectively. The compact footprint, stable lobe formation, and bistable switching behavior demonstrate the strong potential of the proposed metasurface as a low-loss and reconfigurable beam-control solution for future 6G wireless front-end systems.