Generation of limited-diffractive twisted pulses at millimeter waves

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. © 2017 Euraap.
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Submitted on : Tuesday, October 24, 2017 - 2:12:04 PM
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S.C. Pavone, D. Comite, W. Fuscaldo, G. Valerio, A. Galli, et al.. Generation of limited-diffractive twisted pulses at millimeter waves. 11th European Conference on Antennas and Propagation, EUCAP 2017, Mar 2017, Paris, France. ⟨10.23919/EuCAP.2017.7928311⟩. ⟨hal-01622473⟩



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