Additively Manufactured Dielectric Waveguides for Advanced Concepts for Millimeter-Wave Interconnects

Distler, Felix; Sippel, M.; Schür, Jan; Gold, G.; Helmreich, K.; Vossiek, Martin

doi:10.1109/tmtt.2019.2939831

Cited by 13 publications

(2 citation statements)

References 28 publications

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“…Moreover, custom foundry services for specially designed tubes are available. Especially, a PTFE tubing with air holes can be extruded in a hot pressurized dye to maintain the air hole structures for a long tube length [28]- [30]. It is known that cyclic olefin copolymer (COC, TOPAS/ZEONEX) can provide a lower material loss than PTFE (TEFLON) for transmitting THz waves.…”

Section: Waveguide Structure and Thz Measurements Set-upmentioning

confidence: 99%

Low-Loss Polytetrafluoroethylene Hexagonal Porous Fiber for Terahertz Pulse Transmission in the 6G Mobile Communication Window

Lee

Choi

Kim

et al. 2021

IEEE Trans. Microwave Theory Techn.

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Hexagonal porous optical fiber without a central defect is proposed and numerically analyzed with the finite element method (FEM) for transmitting terahertz (THz) electromagnetic wave pulse. In experiments, the transmission characteristics of polytetrafluoroethylene (PTFE) hexagonal porous optical fibers were measured using a THz time-domain spectroscopy (THz-TDS) system. To precisely estimate the effective material loss (EML), we measured the refractive index and absorption coefficient of PTFE in the THz range to use them in FEM analyses, and the EML of the porous fiber was estimated to be lower than that of a bulk rod as large as by a factor of 2 in the frequency range from 0.1 to 0.33 THz. In experiments, we measured the transmission characteristics of both the porous fibers and the bulk rod, to confirm a significant improvement in THz wave transmission nearly by an order of magnitude in the 6G telecommunication window, showing a better performance than theoretical estimations.

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Section: Waveguide Structure and Thz Measurements Set-upmentioning

confidence: 99%

Low-Loss Polytetrafluoroethylene Hexagonal Porous Fiber for Terahertz Pulse Transmission in the 6G Mobile Communication Window

Lee

Choi

Kim

et al. 2021

IEEE Trans. Microwave Theory Techn.

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“…The use of additive manufacturing (AM) techniques, also known as 3D printing, is becoming very popular in a wide range of disciplines, ranging from medicine to mechanics and building construction. In the last few years, AM was also applied in the implementation of microwave components and antennas [1]- [15].…”

Section: Introductionmentioning

confidence: 99%

Microwave Components Realized by Additive Manufacturing Techniques

Tomassoni¹,

Bozzi²

2020

RADIOENGINEERING

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This paper presents an overview of the use of additive manufacturing (AM) technologies for the implementation of microwave components. Two major technological solutions, based on the AM of plastic materials, are discussed: in the former case, the AM plastic is used as a dielectric material that constitutes the component. Conversely, in the latter case, the plastic material is a mere support of the metallization, thus avoiding the contact of the AM plastic with the electromagnetic field and reducing losses. Several examples are illustrated and discussed, to highlight benefits and limitations of AM techniques in the current scenario of microwave applications.

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New insights from broadband simulations into small overmoded smooth and corrugated terahertz waveguides and transitions for NMR-DNP

Doty

Staab

et al. 2021

Journal of Magnetic Resonance Open

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The primary impetus for the work reported in this paper is to develop efficient overmoded waveguides (OMWGs) that employ broadband downtaper transitions that would be compatible with the severe space constraints in high-field NB magnets. Further, it is essential these would be readily manufacturable, as high precision corrugated metallic downtapers for the sub-mmw regime are very difficult to produce. We have simulated numerous alternatives to corrugated circular OMWGs, including most of the previously reported alternatives (except for many of the low-power fiberoptics options) and several novel designs. We conclude that corrugated circular metallic OMWGs are the best of the reported options to date (except from a cost perspective) for diameters down to ~1.5 λ , but the corrugation parameters for small OMWGs need to be significantly different from the previously published guidelines that have worked well for large OMWGs. With numerically optimized small OMWGs, easily manufacturable smooth downtapers appear to work as well as corrugated downtapers in many cases relevant to MAS-DNP probes. Our example simulations will be for the 170–230 GHz range, but the lessons and results should be readily applicable to other ranges by simple scaling.

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Additively Manufactured Dielectric Waveguides for Advanced Concepts for Millimeter-Wave Interconnects

Cited by 13 publications

References 28 publications

Low-Loss Polytetrafluoroethylene Hexagonal Porous Fiber for Terahertz Pulse Transmission in the 6G Mobile Communication Window

Low-Loss Polytetrafluoroethylene Hexagonal Porous Fiber for Terahertz Pulse Transmission in the 6G Mobile Communication Window

Microwave Components Realized by Additive Manufacturing Techniques

New insights from broadband simulations into small overmoded smooth and corrugated terahertz waveguides and transitions for NMR-DNP

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