volume | PIER Journals

Abstract

In this paper, a spatial-multiplexing-based transmission-reflection-integrated full-space metasurface (FS-MS) is proposed, which is applied to the generation of orbital angular momentum (OAM) beam. Using the principles of anisotropy and spatial multiplexing, the metasurface element is designed. The element consists of three dielectric substrates and four metal layers, which are of conventional cross-shaped and slotted cross-shaped construction. The designed element has the ability to independently modulate transmitted and reflected electromagnetic (EM) waves at 15 GHz. When EM waves with different polarizations are incident, the metasurface is capable of transmission at the incident x-polarized waves and reflection at the incident y-polarized waves. Using the designed element, the FS-MS was designed by combining the theories of OAM beam generation and phase superposition. The results show that the metasurface can generate the OAM beam with the topological charge of +2 in the transmission mode and +3 in the reflection mode at 15 GHz. The purity of the generated OAM beam is 78.88% in transmission mode, and 72.87% in reflection mode. The metasurface proposed in this paper is characterized by the integration of transmission and reflection, which is valuable for applications in wireless communications, sensing, and imaging.

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Professor Honggang Hao

Ms. Siyao Li

Dr. Wen Huang

Mr. Yi Shen

Dr. Zonggui Li

Dr. Ting Zhang