High gain low profile horn array with circular polarization using a 3D printed anisotropic dielectric composite material at 38 GHz

Castro, Nelson; Pizarro, Francisco; Rajo‐Iglesias, Eva

doi:10.1038/s41598-022-23441-0

Cited by 4 publications

(3 citation statements)

References 30 publications

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“…Once the parameters are defined, we proceed to print samples and characterize their relative permittivity using the Nicolson-Ross-Weir method 22 , 23 in the band of interest. It is known that there can be differences between the nominal value of the relative permittivity of the filament and the actual printed value depending on the printing parameters 24 , and therefore the characterization of samples is relevant for these implementations. The samples were characterized in the 4.9 GHz to 7.0 GHz band, using a WR159 standard waveguide.…”

Section: Antenna Manufacturing Using 3d-printingmentioning

confidence: 99%

Circular polarized 3D-printed cylindrical DRA using parasitic dielectric helix

Díaz¹,

Díaz²,

Rajo‐Iglesias³

et al. 2023

Sci Rep

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This article presents a 3D-printed cylindrical dielectric resonator antenna operating at 5.8 GHz that achieves circular polarization by integrating a fully dielectric parasitic helix with a higher permittivity than the cylindrical resonator. The antenna polarization can be right-handed or left-handed depending on the turning sense of the helix. An extensive parametric study was done for the helix design to evaluate the effects of the dimensions and dielectric constant of the helix over the matching and axial ratio of the antenna. The manufacturing is made using low-loss dielectric filaments and a low-cost 3D printer. Simulation and measurement results show that both antennas are well-matched and operate with the corresponding circular polarization, with an axial ratio bandwidth compatible with UAV applications.

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Section: Antenna Manufacturing Using 3d-printingmentioning

confidence: 99%

Circular polarized 3D-printed cylindrical DRA using parasitic dielectric helix

Díaz¹,

Díaz²,

Rajo‐Iglesias³

et al. 2023

Sci Rep

Self Cite

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“…where ϵ ⊥ and ϵ ∥ are the effective permittivity along the grating's extraordinary and ordinary optic axes, and f is the filling ratio of medium 1. Numerous examples of simple polarization devices using subwavelength gratings have been demonstrated including achromatic quarter-wave plates [9]- [11], half-wave plates [12], and anti-reflection coatings [13]. More exotic broadband, multiband, and multifunctional polarization converters have also been proposed using more complex structures with cascaded and rotated dielectric elements [14]- [16].…”

Section: Introductionmentioning

confidence: 99%

Additively-Manufactured All-Dielectric Microwave Polarization Converters Using Ceramic Stereolithography

Young

Kauf

Kutsch

et al. 2023

IEEE Open J. Antennas Propag.

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We report a class of all-dielectric, additively-manufactured polarization converters with tailored temporal frequency responses within the Ku and Ka microwave bands (15 -40 GHz). These multi-layer devices consist of cascaded, subwavelength, high-contrast gratings with different fill fractions and orientations, providing control over the effective anisotropic properties of each layer. In design, the subwavelength gratings are modeled as homogeneous anisotropic layers. This allows the overall metastructure to be treated as a stratified dielectric medium. Therefore, it can be analyzed and optimized using plane-wave transfer matrix techniques that fully account for multiple reflections between layers. Using this cascaded grating geometry, a variety of high-efficiency microwave polarization converters can be realized with broadband, multiband, or multifunctional behavior. The transmissive metastructures do not require anti-reflection layers since impedance matching is incorporated into their design. Three example devices based on alumina/air gratings have been monolithically fabricated using ceramic stereolithography: a broadband reflective half-wave plate, a broadband isotropic polarization rotator, and a dual-band linearto-circular polarization converter.

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“…In particular, highfrequency topologies have gotten special interest due to the appearance of low-cost and low-loss dielectric filaments suitable for this technology. Among others, in recent implementations we can find lenses [3], [4], dielectric resonator antennas [5], [6] or polarizers [7], [8].…”

Section: Introductionmentioning

confidence: 99%

3-D-Printed Spiral Leaky Wave Antenna With Circular Polarization

Lira-VALDES¹,

Rajo‐Iglesias

Pizarro³

2023

IEEE Open J. Antennas Propag.

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This article presents the design, manufacturing and measurement of a fully dielectric leaky wave antenna operating at 18 GHz. The antenna is composed of a grounded dielectric substrate with a top dielectric Archimedean spiral corrugation, which allows obtaining a directive pencil-beam in broadside direction with circular polarization depending on the turning sense of the spiral. The 3D-printing implementation allows having two new degrees of freedom for the spiral when compared to other previous implementations based on metals, which are the relative permittivity and the height of the spiral. A study about the effect of these two parameters is presented and one proposed antenna is manufactured using lowloss and low-cost ABS filaments. Measurement results show good agreement with simulations, validating the implementation of this kind of antennas using low-cost 3D-printing.

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High gain low profile horn array with circular polarization using a 3D printed anisotropic dielectric composite material at 38 GHz

Cited by 4 publications

References 30 publications

Circular polarized 3D-printed cylindrical DRA using parasitic dielectric helix

Circular polarized 3D-printed cylindrical DRA using parasitic dielectric helix

Additively-Manufactured All-Dielectric Microwave Polarization Converters Using Ceramic Stereolithography

3-D-Printed Spiral Leaky Wave Antenna With Circular Polarization

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