In this paper, the generation of twisted pulses carrying orbital angular momentum is discussed. Such pulses are generated by polychromatic superposition of higher-order Bessel beams. The non-negligible effect of the wavenumber frequency-dispersion on the pulse propagation at millimeter waves is taken into account. Large operating bandwidths are required to synthesize spatially confined electromagnetic pulses. For this reason, a wideband Bessel-beam launcher is proposed, implementing an inward cylindrical traveling-wave aperture distribution with an azimuthal phase variation. Preliminary results clearly show the possibility of successful generation of twisted electromagnetic pulses at millimeter waves.

Generation of limited-diffractive twisted pulses at millimeter waves / Pavone, Santi C.; Comite, Davide; Fuscaldo, Walter; Valerio, Guido; Galli, Alessandro; Ettorre, Mauro; Albani, Matteo. - (2017), pp. 3511-3514. ((Intervento presentato al convegno 11th European Conference on Antennas and Propagation, EUCAP 2017 tenutosi a Paris; France [10.23919/EuCAP.2017.7928311].

Generation of limited-diffractive twisted pulses at millimeter waves

Comite, Davide;Fuscaldo, Walter;Galli, Alessandro;ETTORRE, MAURO;
2017

Abstract

In this paper, the generation of twisted pulses carrying orbital angular momentum is discussed. Such pulses are generated by polychromatic superposition of higher-order Bessel beams. The non-negligible effect of the wavenumber frequency-dispersion on the pulse propagation at millimeter waves is taken into account. Large operating bandwidths are required to synthesize spatially confined electromagnetic pulses. For this reason, a wideband Bessel-beam launcher is proposed, implementing an inward cylindrical traveling-wave aperture distribution with an azimuthal phase variation. Preliminary results clearly show the possibility of successful generation of twisted electromagnetic pulses at millimeter waves.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1189069
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