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.
Original language | English |
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Number of pages | 14 |
Journal | Royal Society Open Science |
Volume | 6 |
Issue number | 12 |
DOIs | |
Publication status | Published - 11 Dec 2019 |
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Data from OAM (09-2019)
Hilton, G. (Creator), Beach, M. (Creator) & Pelham, T. (Creator), University of Bristol, 4 Sept 2019
DOI: 10.5523/bris.3juehd5wwl6491zzz99038tll9, http://data.bris.ac.uk/data/dataset/3juehd5wwl6491zzz99038tll9
Dataset
Profiles
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Dr Geoff Hilton
- School of Electrical, Electronic and Mechanical Engineering - Senior Lecturer in Electrical & Electronic Engineering
- Communication Systems and Networks
Person: Academic , Member