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High-Order Vortex Beams Generation in the Radio-Frequency Domain

2015; IEEE Antennas & Propagation Society; Volume: 15; Linguagem: Inglês

10.1109/lawp.2015.2479044

1548-5757

Fabio Spinello, Giuseppe Parisi, Fabrizio Tamburini, Giovanni Massaro, C.G. Someda, Matteo Oldoni, Roberto A. Ravanelli, Filippo Romanato, Elettra Mari,

Microfluidic and Bio-sensing Technologies

A novel technique for generating high-order vortex beams in the radio-frequency domain is reported. Vortex beams with non-null radial index are generated by means of a dielectric mask, mounted upon either a twisted parabolic reflector or a conventional one. The far-field intensity pattern is compared to analytical models and numerical simulations, thus illustrating how diffraction and illumination can affect the generated fields.