https://doi.org/10.1051/epjconf/201714904014
The gyrotron – a natural source of high-power orbital angular momentum millimeter-wave beams
1 Karlsruhe Institute of Technology (KIT), IHM and IHE, Karlsruhe, Germany
2 Department of Electrical Eng., Ulsan National Inst. of Science and Technology (UNIST), Ulsan, South Korea
3 Department of Physics, Ulsan National Institute of Science and Technology (UNIST), Ulsan, South Korea
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Published online: 4 August 2017
Abstract
Orbital angular momentum (OAM) of electromagnetic-wave beams provides further diversity to multiplexing in wireless communication. The present report shows that higher-order mode gyrotrons are natural sources of high-power OAM millimeter (mm) wave beams. The well-defined OAM of their rotating cavity modes operating at near cutoff frequency has been derived by photonic and electromagnetic wave approaches.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
