Bessel-Gauss beams have mainly been proposed in optics as a solution for reducing the on-axis intensity oscillations typical of Bessel beams. Previous investigations on Bessel-Gauss beams are based on a scalar theory in the paraxial approximation, and thus cannot be extended to the microwave range where a fully vectorial approach is needed. Here, the generation of Bessel-Gauss beams through leaky waves is investigated. First, the nondiffractive and focusing properties of Bessel-Gauss beams generated through leaky waves are extensively examined in the frame of a vectorial approach. Useful design criteria are derived to optimize both the radiation and the focusing efficiency of such beams. On this basis, leaky-wave radiators synthesized to support the generation of a Bessel-Gauss beam over a given frequency band in the microwave range are presented. Full-wave results corroborate the concept.

Bessel-Gauss beams through leaky waves: Focusing and diffractive properties / Fuscaldo, W; Benedetti, A; Comite, D; Baccarelli, P; Burghignoli, P; Galli, A. - In: PHYSICAL REVIEW APPLIED. - ISSN 2331-7019. - 13:6(2020). [10.1103/PhysRevApplied.13.064040]

Bessel-Gauss beams through leaky waves: Focusing and diffractive properties

Fuscaldo, W
Primo
;
Benedetti, A
Secondo
;
Comite, D;Burghignoli, P;Galli, A
Ultimo
2020

Abstract

Bessel-Gauss beams have mainly been proposed in optics as a solution for reducing the on-axis intensity oscillations typical of Bessel beams. Previous investigations on Bessel-Gauss beams are based on a scalar theory in the paraxial approximation, and thus cannot be extended to the microwave range where a fully vectorial approach is needed. Here, the generation of Bessel-Gauss beams through leaky waves is investigated. First, the nondiffractive and focusing properties of Bessel-Gauss beams generated through leaky waves are extensively examined in the frame of a vectorial approach. Useful design criteria are derived to optimize both the radiation and the focusing efficiency of such beams. On this basis, leaky-wave radiators synthesized to support the generation of a Bessel-Gauss beam over a given frequency band in the microwave range are presented. Full-wave results corroborate the concept.
2020
Bessel-Gauss beams; near-field focusing; leaky waves; leaky wave antennas; localized waves; nondiffracting waves; Bessel beams; diffraction
01 Pubblicazione su rivista::01a Articolo in rivista
Bessel-Gauss beams through leaky waves: Focusing and diffractive properties / Fuscaldo, W; Benedetti, A; Comite, D; Baccarelli, P; Burghignoli, P; Galli, A. - In: PHYSICAL REVIEW APPLIED. - ISSN 2331-7019. - 13:6(2020). [10.1103/PhysRevApplied.13.064040]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1427867
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