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Orbital Angular Momentum in Radio—A System Study

IEEE Transactions on Antennas and Propagation · 2009 · Vol. 58(2) · pp. 565–572

Siavoush M. Mohammadi✉(Swedish Institute of Space Physics)L. K. S. Daldorff(Uppsala University)J. Bergman(Swedish Institute of Space Physics)R. Karlsson(Uppsala University)B. Thidé(Swedish Institute of Space Physics)Kamyar Forozesh(Uppsala University)T. D. Carozzi(University of Glasgow)B. Isham(InterAmerican University of Puerto Rico)

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Abstract

Recent discoveries concerning rotating (helical) phase fronts and orbital angular momentum (OAM) of laser beams are applied to radio frequencies and comprehensive simulations of a radio OAM system are performed. We find that with the use of vector field-sensing electric and magnetic triaxial antennas, it is possible to unambiguously estimate the OAM in radio beams by local measurements at a single point, assuming ideal (noiseless) conditions and that the beam axis is known. Furthermore, we show that conventional antenna pattern optimization methods can be applied to OAM-generating circular arrays to enhance their directivity.

Orbital Angular Momentum in Optics Microfluidic and Bio-sensing Technologies Metamaterials and Metasurfaces ApplicationsAngular momentumPhysicsDirectivityAntenna (radio)OpticsRadio frequencyRadio waveMagnetic fieldAcousticsComputational physics

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