Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 70, Issue 2, Pages 1068-1076Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2021.3111214
Keywords
Folded reflectarray (FRA); orbital angular momentum (OAM); programmable metasurface
Funding
- China Postdoctoral Science Foundation [2020M682876]
- Guangdong Basic and Applied Basic Research Foundation [2019A1515111127]
- State Key Laboratory of Millimeter Waves Foundation [K202113]
- Shenzhen Science and Technology Programs [JCYJ20190808145411289, JCYJ20180305124543176]
- Natural Science Foundation of Guangdong Province [2018A030313481]
- Shenzhen University [860-000002110311]
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In this study, an OAM generator based on a folded reflectarray with high-gain, low-profile, broadband, and programmable characteristics is proposed. The generator can generate high-gain and high mode purity OAM-mode-reconfigurable beams in a high-frequency range, and has the potential for integration with multiple functions in OAM-based wireless communications and radar detection.
Transmissive and reflective metasurfaces have been extensively studied for generating an orbital angular momentum (OAM)-carrying beam. However, the existing OAM generators suffer from feed blockage, large profile, OAM mode nonreconfigurable, and narrowband. An OAM generator that integrates multiple functions into a single module is in high demand in OAM-based applications. In this study, we proposed an OAM generator based on a folded reflectarray with high-gain low-profile broadband and programmable characteristics. The proposed multifunctional OAM generator, comprising half the volume of the normal OAM metasurfaces, can generate a high-gain l = 0, l = +1, and l = +2 OAM-mode-reconfigurable beams with high mode purity over the frequency range of 9.5-10.5 GHz. The proposed OAM generator-integrated multiple functions have potential applications in OAM-based wireless communications and radar detection.
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