In this paper the focusing capability of a radiating aperture implementing an inward cylindrical traveling wave tangential electric field distribution directed along a fixed polarization unit vector is investigated. In particular, it is shown that such an aperture distribution generates a non-diffractive Bessel beam whose transverse component (with respect to the normal of the radiating aperture) of the electric field takes the form of a zero-th order Bessel function. As a practical implementation of the theoretical analysis, a circular-polarized Bessel beam launcher, made by a radial parallel plate waveguide loaded with several slot pairs, arranged on a spiral pattern, is designed and optimized. The proposed launcher performance agrees with the theoretical model and exhibits an excellent polarization purity.

Pavone, S.C., Ettorre, M., Casaletti, M., Albani, M. (2016). Transverse circular-polarized Bessel beam generation by inward cylindrical aperture distribution. OPTICS EXPRESS, 24(10), 11103-11111 [10.1364/OE.24.011103].

Transverse circular-polarized Bessel beam generation by inward cylindrical aperture distribution

Pavone, Santi C.;Ettorre, M.;Casaletti, M.;Albani, M.
2016-01-01

Abstract

In this paper the focusing capability of a radiating aperture implementing an inward cylindrical traveling wave tangential electric field distribution directed along a fixed polarization unit vector is investigated. In particular, it is shown that such an aperture distribution generates a non-diffractive Bessel beam whose transverse component (with respect to the normal of the radiating aperture) of the electric field takes the form of a zero-th order Bessel function. As a practical implementation of the theoretical analysis, a circular-polarized Bessel beam launcher, made by a radial parallel plate waveguide loaded with several slot pairs, arranged on a spiral pattern, is designed and optimized. The proposed launcher performance agrees with the theoretical model and exhibits an excellent polarization purity.
2016
Pavone, S.C., Ettorre, M., Casaletti, M., Albani, M. (2016). Transverse circular-polarized Bessel beam generation by inward cylindrical aperture distribution. OPTICS EXPRESS, 24(10), 11103-11111 [10.1364/OE.24.011103].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/1007297