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A Transmission Metasurface for Generating OAM Beams.
- Source :
- IEEE Antennas & Wireless Propagation Letters; Oct2018, Vol. 17 Issue 10, p1793-1796, 4p
- Publication Year :
- 2018
-
Abstract
- This letter presents a novel transmission metasurface to achieve orbital angular momentum (OAM) waves at the X-band. The unit cell of the proposed metasurface consists of three dielectric layers and four metallic layers, where the metallic layer is composed of an outer metallic ring and a center quasi-snow patch. A good transmission coefficient of the unit cell is obtained at the operating frequency. Meanwhile, a full 360° phase shift can be achieved by changing the length of the quasi-snow patch. The method of generating OAM waves is studied and analyzed. Based on this method, a metasurface producing a +1-mode OAM wave is designed and simulated. To verify this concept, one prototype is fabricated, assembled, and measured. The measured results agree well with the simulated ones, showing that the +1-mode OAM wave can be generated successfully with a high gain of 14.5 dBi. Moreover, a narrow divergence angle of +/−9° is achieved in the produced OAM wave. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15361225
- Volume :
- 17
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- IEEE Antennas & Wireless Propagation Letters
- Publication Type :
- Academic Journal
- Accession number :
- 132209371
- Full Text :
- https://doi.org/10.1109/LAWP.2018.2867045