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Article

Rapid Prototyping of Bio-Inspired Dielectric Resonator Antennas for Sub-6 GHz Applications

1
STIIMA CNR, Institute of Intelligent Industrial Technologies and Systems for Advanced Manufacturing, National Research Council, Via P. Lembo, 38/F, 70124 Bari, Italy
2
Politecnico di Bari, Dipartimento di Ingegneria Elettrica e dell’Informazione, Via E. Orabona 4, 70125 Bari, Italy
3
Center for Biomolecular Nanotechnolgies, Istituto Italiano di Tecnologia (IIT), Via E. Barsanti 14, 73010 Arnesano, Italy
4
STIIMA CNR, Institute of Intelligent Industrial Technologies and Systems for Advanced Manufacturing, National Research Council, Via A. Corti, 12, 20133 Milan, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Paulo M. Mendes
Micromachines 2021, 12(9), 1046; https://doi.org/10.3390/mi12091046
Received: 26 July 2021 / Revised: 24 August 2021 / Accepted: 26 August 2021 / Published: 29 August 2021
(This article belongs to the Special Issue Micro Manufacturing for 5G Communications)
Bio-inspired Dielectric Resonator Antennas (DRAs) are engaging more and more attention from the scientific community due to their exceptional wideband characteristic, which is especially desirable for the implementation of 5G communications. Nonetheless, since these antennas exhibit peculiar geometries in their micro-features, high dimensional accuracy must be accomplished via the selection of the most suitable fabrication process. In this study, the challenges to the manufacturing process presented by the wideband Spiral shell Dielectric Resonator Antenna (SsDRA), based on the Gielis superformula, are addressed. Three prototypes, made of three different photopolymer resins, were manufactured by bottom-up micro-Stereolithography (SLA). This process allows to cope with SsDRA’s fabrication criticalities, especially concerning the wavy features characterizing the thin spiral surface and the micro-features located in close proximity to the spiral origin. The assembly of the SsDRAs with a ground plane and feed probe was also accurately managed in order to guarantee reliable and repeatable measurements. The scattering parameter S11 trends were then measured by means of a Vector Network Analyzer, while the realized gains and 3D radiation diagrams were measured in the anechoic chamber. The experimental results show that all SsDRAs display relevant wideband behavior of 2 GHz at −10 dB in the sub-6 GHz range. View Full-Text
Keywords: stereolithography; dielectric resonator antennas; Gielis superformula; wideband; sub-6 GHz applications stereolithography; dielectric resonator antennas; Gielis superformula; wideband; sub-6 GHz applications
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MDPI and ACS Style

Marrocco, V.; Basile, V.; Marasco, I.; Niro, G.; Melchiorre, L.; D’Orazio, A.; Grande, M.; Fassi, I. Rapid Prototyping of Bio-Inspired Dielectric Resonator Antennas for Sub-6 GHz Applications. Micromachines 2021, 12, 1046. https://doi.org/10.3390/mi12091046

AMA Style

Marrocco V, Basile V, Marasco I, Niro G, Melchiorre L, D’Orazio A, Grande M, Fassi I. Rapid Prototyping of Bio-Inspired Dielectric Resonator Antennas for Sub-6 GHz Applications. Micromachines. 2021; 12(9):1046. https://doi.org/10.3390/mi12091046

Chicago/Turabian Style

Marrocco, Valeria, Vito Basile, Ilaria Marasco, Giovanni Niro, Luigi Melchiorre, Antonella D’Orazio, Marco Grande, and Irene Fassi. 2021. "Rapid Prototyping of Bio-Inspired Dielectric Resonator Antennas for Sub-6 GHz Applications" Micromachines 12, no. 9: 1046. https://doi.org/10.3390/mi12091046

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