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Experimental evaluation of 3D printed spiral phase plates for enabling an orbital angular momentum multiplexed radio system
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Allen, B., Pelham, T., Wu, Y., Drysdale, T., Isakov, Dmitry, Gamlath, C., Stevens, C., Hilton, G., Grant, P. S. and Beach, M. A. (2019) Experimental evaluation of 3D printed spiral phase plates for enabling an orbital angular momentum multiplexed radio system. Royal Society Open Science, 6 (12). pp. 1-14. doi:10.1098/rsos.191419 ISSN 2054-5703.
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Official URL: https://doi.org/10.1098/rsos.191419
Abstract
This paper evaluates the performance of three-dimensionally (3D) printed spiral phase plates (SPPs) for enabling an orbital angular momentum (OAM) multiplexed radio system. The design and realization of the SPPs by means of additive manufacturing exploiting a high-permittivity material is described. Modes 1 and 2 SPPs are then evaluated at 15 GHz in terms of 3D complex radiation pattern, mode purity and beam collimation by means of a 3D printed dielectric lens. The results with the lens yield a crosstalk of −8 dB for between modes 1 and −1, and −11.4 dB for between modes 2 and −2. We suggest a mode multiplexer architecture that is expected to further reduce the crosstalk for each mode. An additional loss of 4.2 dB is incurred with the SPPs inserted into the communication link, which is undesirable for obtaining reliable LTE-based communications. Thus, we suggest: using lower loss materials, seeking ways to reduce material interface reflections or alternative ways of OAM multiplexing to realize a viable OAM multiplexed radio system.
| Item Type: | Journal Article | |||||||||
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| Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | |||||||||
| Library of Congress Subject Headings (LCSH): | Wireless communication systems, Angular momentum, Multiplexing | |||||||||
| Journal or Publication Title: | Royal Society Open Science | |||||||||
| Publisher: | The Royal Society Publishing | |||||||||
| ISSN: | 2054-5703 | |||||||||
| Official Date: | 11 December 2019 | |||||||||
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| Volume: | 6 | |||||||||
| Number: | 12 | |||||||||
| Page Range: | pp. 1-14 | |||||||||
| DOI: | 10.1098/rsos.191419 | |||||||||
| Status: | Peer Reviewed | |||||||||
| Publication Status: | Published | |||||||||
| Access rights to Published version: | Open Access (Creative Commons) | |||||||||
| Copyright Holders: | Authors | |||||||||
| Date of first compliant deposit: | 14 December 2019 | |||||||||
| Date of first compliant Open Access: | 18 December 2019 | |||||||||
| RIOXX Funder/Project Grant: |
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