Simulation of OAM waves from an annular antenna array
This work presents the simulation of a ten-element helical antenna array performed in COMSOL Multiphysics, which generates electromagnetic waves carrying orbital angular momentum in the millimeter wave range. The radiation patterns and phase distributions for different topological charges ( l = 0, ±1, ±2, ±3) were investigated. The formation of a stable spiral wave front at a distance of ∼1.5λ from the emitter was demonstrated. Simulation of diffraction on a double slit and a triangular aperture revealed a characteristic shift of the interference pattern depending on the sign and magnitude of the OAM, as well as the preservation of polarization. The developed model shows promise for applications in spatial multiplexing systems and fundamental studies of the interaction of twisted radiation with matter.
Keywords
orbital angular momentum,
circular polarization,
ring antenna array,
helical antenna,
radiation patterns,
mathematical modelingAuthors
| Burnin Mark A. | Tomsk Polytechnic University | mab54@tpu.ru |
| Bogdanov Oleg V. | Tomsk Polytechnic University; Tomsk State University | bov@tpu.ru |
Всего: 2
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