Evaluation of dielectric properties of 3D printed objects based on printing resolution

Veselý, Petr; Tichý, Tomáš; Šefl, Ondřej; Horynová, Eva

doi:10.1088/1757-899x/461/1/012091

Cited by 38 publications

(20 citation statements)

References 5 publications

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“…Previously published papers [9,10] focused on the dielectric properties (permittivity, E p , or resistivity) of 3D filament materials and presented results for the most common materials, such as, in suitable conditions, biodegradable polylactic acid (PLA) [11], high temperature and impact resistant acrylonitrile butadiene styrene (ABS-T) [12], and chemically resistant polyethylene terephthalate glycol (PETG) [13]. However, various new materials for the use of 3D printing are still being developed.…”

Section: Introductionmentioning

confidence: 99%

FFF 3D Printing in Electronic Applications: Dielectric and Thermal Properties of Selected Polymers

et al. 2021

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The present study is a focused and comprehensive analysis of the dielectric and thermal properties of twenty-four 3D printed polymers suitable for fused filament fabrication (FFF) in electronic applications. The selected polymers include various thermoplastic elastomers, such as thermoplastics based on polycarbonate (PC), polyethylene terephthalate glycol (PETG), and acrylonitrile butadiene styrene (ABS-T). Their overall thermal behavior, including oxidation stability, glass transition, and melting temperature, was explored using simultaneous thermal analysis (STA) and differential scanning calorimetry (DSC). Considering their intended usage in electronic applications, the dielectric strength (Ep) and surface/volume resistivity (ρs/ρv) were comprehensively tested according to IEC 60243-1 and IEC 62631-3, respectively. The values of the dielectric constant (ε’) and loss factor (ε”) were also determined by broadband dielectric spectroscopy (BDS). While, on the one hand, exceptional dielectric properties were observed for some thermoplastic elastomers, the materials based on PCs, on the other hand, stood out from the others due to their high oxidation stability and above average dielectric properties. The low-cost materials based on PETG or ABS-T did not achieve thermal properties similar to those of the other tested polymers; nevertheless, considering the very reasonable price of these polymers, the obtained dielectric properties are promising for undemanding electronic applications.

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Section: Introductionmentioning

confidence: 99%

FFF 3D Printing in Electronic Applications: Dielectric and Thermal Properties of Selected Polymers

et al. 2021

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“…First of all, widely used and cheap materials like PLA, are not dedicated for precise RF applications, therefore the constant value of dielectric permittivity is not the manufacturer priority. As it was shown in [12] dielectric parameters also depend on the printing resolution. For this reason, their values used in this design were determined by measuring samples printed from the same spool of PLA material and with the same print settings as the desired dielectric cylinder.…”

Section: Influence Of 3d Printing Process On Miniaturized Espar mentioning

confidence: 73%

Miniaturization of ESPAR Antenna Using Low-Cost 3D Printing Process

Czelen

Rzymowski

Nyka

et al. 2020

2020 14th European Conference on Antennas and Propagation (EuCAP)

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In this paper, the miniaturized electronically steerable parasitic array radiator (ESPAR) antenna is presented. The size reduction was obtained by embedding its active and passive elements in polylactic acid (PLA) plastic material commonly used in low-cost 3D printing. The influence of 3D printing process imperfections on the ESPAR antenna design is investigated and a simple yet effective method to compensate them has been proposed. An antenna prototype was fabricated and measured, which showed that the experimental and simulated results are in good agreement. Realized antenna is characterized by 5.6 dBi peak gain and reflection coefficient of-17.6 dB. Base radius reduction of 23% and occupied area reduction of 40% were achieved.

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“…Despite the fact that PLA dielectric constant should be about 3.5 at a frequency range around 4 GHz [37,38], the value practically depends on 3D manufacturing properties such as printing temperature [47] and printing resolution [48]. Hence, by considering actual manufacturing conditions (printing temperature of 220 • C and layer thickness of 50 µm) and at the used frequency band, the dielectric constant would be affected to be slightly smaller (around 2.7) [47][48][49][50]. To see the effect of such changes in the dielectric constant, the array was resimulated using the new estimated dielectric constant.…”

Section: Fabrication and Measurementsmentioning

confidence: 99%

Standing-Wave Feeding for High-Gain Linear Dielectric Resonator Antenna (DRA) Array

Abdalmalak

Althuwayb

Lee

et al. 2022

Sensors

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A novel feeding method for linear DRA arrays is presented, illuminating the use of the power divider, transitions, and launchers, and keeping uniform excitation to array elements. This results in a high-gain DRA array with low losses with a design that is simple, compact and inexpensive. The proposed feeding method is based on exciting standing waves using discrete metallic patches in a simple design procedure. Two arrays with two and four DRA elements are presented as a proof of concept, which provide high gains of 12 and 15dBi, respectively, which are close to the theoretical limit based on array theory. The radiation efficiency for both arrays is about 93%, which is equal to the array element efficiency, confirming that the feeding method does not add losses as in the case of standard methods. To facilitate the fabrication process, the entire array structure is 3D-printed, which significantly decreases the complexity of fabrication and alignment. Compared to state-of-the-art feeding techniques, the proposed method provides higher gain and higher efficiency with a smaller electrical size.

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Evaluation of dielectric properties of 3D printed objects based on printing resolution

Cited by 38 publications

References 5 publications

FFF 3D Printing in Electronic Applications: Dielectric and Thermal Properties of Selected Polymers

FFF 3D Printing in Electronic Applications: Dielectric and Thermal Properties of Selected Polymers

Miniaturization of ESPAR Antenna Using Low-Cost 3D Printing Process

Standing-Wave Feeding for High-Gain Linear Dielectric Resonator Antenna (DRA) Array

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