volume | PIER Journals

Abstract

This paper presents a single-layer reflective metasurface for generating dual-linearly polarized orbital angular momentum (OAM) beams with mode number l=-1 at X-band. Phase modulation is achieved by adjusting the unit cell dimensions, which efficiently converts linearly polarized waves into vortex waves with the desired OAM mode. The proposed unit cell integrates a compact `米'-shaped inner patch with a square frame, with a compact size of 0.4λ₀ × 0.4λ₀, enabling independent control of both x-polarized and y-polarized waves. By varying the unit size,a broad phase shift range of 374° is achieved at 8-12 GHz. Based on phase compensation principles, the designed metasurface array is successfully generates dual-polarized vortex waves at X-band. The proposed metasurface exhibits high gain, narrow divergence angle, bandwidth, and dual-polarization capability, demonstrating significant potential for OAM wave multiplexing in wireless communication systems.

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Dr. Shuman Li

Dr. Leyuan Li

Dr. Ying Sun

Professor Zhuopeng Wang

Professor Lin Shao