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
Published online: 4 August 2017
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
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