Large Depth of Field Pseudo-Bessel Beam Generation With a RLSA Antenna

Mazzinghi, Agnese; Balma, Massimo; Devona, Dorina; Guarnieri, Giacomo; Mauriello, Giuseppe; Albani, Matteo; Freni, A.

doi:10.1109/tap.2014.2324557

Cited by 92 publications

(47 citation statements)

References 27 publications

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“…The optimization procedure outlined in [10] has been used for defining the size and position of the slots of the RLSA antenna. It is worth mentioning that a similar procedure has been adopted in [11] for the generation of a circular polarized Bessel beam by an RLSA structure [12]. However, in this case, the aperture distribution over the slotted plate of the RLSA consists of an azimuthally invariant zeroth order Bessel function.…”

Section: Introductionmentioning

confidence: 99%

Experimental Validation of Bessel Beam Generation Using an Inward Hankel Aperture Distribution

Ettorre

Pavone

Casaletti

et al. 2015

IEEE Trans. Antennas Propagat.

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In this paper, we prove experimentally that nondiffractive Bessel beams can be generated by using inward cylindrical traveling wave aperture distributions. An azimuthally invariant inward traveling wave distribution is defined over the aperture of a radial line slot array (RLSA) to launch a Bessel beam whose normal electric-field component assumes a truncated, zeroth-order Bessel function. An optimization procedure based on a holographic approach is used for tuning the position and size of the slots of the RLSA. The antenna is centrally fed by a coaxial probe transition. The final structure operates at 12.5 GHz. Full-wave simulations and measurements of the vertical component of the electric field show that a non-diffractive radiation is obtained within a range larger than 12 wavelengths in front of the antenna. The generated Bessel beam presents a stable halfpower beamwidth of about 20 mm within this range. The proposed system may open new opportunities for planar, low-profile Bessel beam generators at millimeter waves, Terahertz, and optics.Index Terms-Bessel beams, focusing, near field, radial line slot array (RLSA).Massimiliano Casaletti (M'10) was born in Siena, Italy, in 1975.

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Section: Introductionmentioning

confidence: 99%

Experimental Validation of Bessel Beam Generation Using an Inward Hankel Aperture Distribution

Ettorre

Pavone

Casaletti

et al. 2015

IEEE Trans. Antennas Propagat.

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“…Bessel beams, a class of nondiffractive solutions of Helmholtz wave equation, have been widely used in many areas, such as wireless power transfer, medical imaging and near‐field probing . There have been two methods to generate the Bessel beam; one is the scalar design approach and the other is the vector approach.…”

Section: Introductionmentioning

confidence: 99%

“…There have been two methods to generate the Bessel beam; one is the scalar design approach and the other is the vector approach. The scalar design approach can be adopted to implement the Bessel launchers by using axicons, holograms, and metallic circular gratings . However, this approach is only valid for a large aperture ( ρ 1 > > λ 0 , where λ 0 is the wavelength in free space) and small radial wavenumber ( k ρ < 0.3 k 0 , where k 0 is the wavenumber in free space), which indicates a large beamwidth.…”

Section: Introductionmentioning

confidence: 99%

“…Bessel beams, a class of nondiffractive solutions of Helmholtz wave equation, have been widely used in many areas, such as wireless power transfer, medical imaging and nearfield probing. [1][2][3][4][5][6] There have been two methods to generate the Bessel beam; one is the scalar design approach and the other is the vector approach. The scalar design approach can be adopted to implement the Bessel launchers by using axicons, holograms, and metallic circular gratings.…”

Section: Introductionmentioning

confidence: 99%

“…The scalar design approach can be adopted to implement the Bessel launchers by using axicons, holograms, and metallic circular gratings. [1][2][3][4] However, this approach is only valid for a large aperture (ρ 1 > > λ 0 , where λ 0 is the wavelength in free space) and small radial wavenumber (k ρ < 0.3 k 0 , where k 0 is the wavenumber in free space), which indicates a large beamwidth. To improve the transverse resolution and concentrated beam power, a narrow beamwidth is typically required.…”

Section: Introductionmentioning

confidence: 99%

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A reconfigurable Bessel antenna for near‐field beam deflection

Cheng

Yang

et al. 2020

Micro & Optical Tech Letters

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This letter presents a reconfigurable leaky‐wave antenna for near‐field beam manipulation. The proposed antenna is based on a radial waveguide and a reconfigurable capacitive sheet, which is divided into four regions. To realize the reconfigurability, PIN diodes are electrically soldered to the gap between the adjacent patches in the upper surface except for the isolation zone, where no diodes are printed. By switching the states of PIN diodes in each region by turns, wavenumbers with two different azimuths are generated, thus the near‐field beam deflection can be achieved in different regions. By using the Genetic Algorithm, the PIN diodes are optimally deployed for realizing high antenna efficiency. The simulated (measured) results show that with the implementation of the reconfigurable capacitive sheet results in a near‐field beam scanning property. The beam deflection at a tilted angle of 17.4° (16.2°) can be achieved in different regions.

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Bessel‐Beam Antennas

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Fuscaldo

Burghignoli

et al. 2021

Wiley Encyclopedia of Electrical and Electronics Engineering

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The capability of controlling the spatial broadening of the radiation moving away from the relevant sources is considered a very attractive feature for a plethora of applications, such as imaging, diagnostic, and wireless power transfer. An important class of ideal solutions of the scalar wave equation that remain confined and do not undergo diffracting spreading are the so‐called Bessel beams.In the past few decades, several techniques have been proposed to design zeroth‐ and higher order Bessel beams, all based on the scalar wave theory.More recently, a significant amount of research activity has been devoted to design devices and techniques for the generation of Bessel beams at lower frequencies, thus based on conventional vector solutions of Maxwell's equation. A comprehensive review of the most representative approaches constitutes the main goal of this article.

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Large Depth of Field Pseudo-Bessel Beam Generation With a RLSA Antenna

Cited by 92 publications

References 27 publications

Experimental Validation of Bessel Beam Generation Using an Inward Hankel Aperture Distribution

Experimental Validation of Bessel Beam Generation Using an Inward Hankel Aperture Distribution

A reconfigurable Bessel antenna for near‐field beam deflection

Bessel‐Beam Antennas

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