On Surface Losses in Direct Metal Laser Sintering Printed Millimeter and Submillimeter Waveguides

Holmberg, Max; Dancila, Dragos; Rydberg, Anders; Hjörvarsson, Bjørgvin; Jansson, Ulf; Marattukalam, Jithin James; Johansson, Niklas; Andersson, Joakim

doi:10.1007/s10762-018-0470-x

Cited by 12 publications

(5 citation statements)

References 9 publications

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“…[34]. It was shown previously, that the losses introduced by conductor roughness can significantly influence the performance of various microwave devices, especially at mm-wave frequencies [32]- [34]. For the numerical simulations, we use the commercial software CST Microwave Studio [39].…”

Section: A Cell Architecturementioning

confidence: 99%

“…[20] provides a basis for the synthesis of efficient mm-wave metasurfaces, several challenges in the circuit board design and the experimental characterization remain. At mmwave frequencies, fabrication tolerances [30], the choice of circuit board materials [31], surface roughness [32]- [34] and conductor coatings [35] play an important role.…”

Section: Introductionmentioning

confidence: 99%

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High-Efficiency Refracting Millimeter-Wave Metasurfaces

Olk¹,

Macchi²,

Powell

2020

IEEE Trans. Antennas Propagat.

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Printed circuit metasurfaces have attracted significant attention in the microwave community for their capability of versatile wavefront manipulation. Despite their promising potential in telecommunications and radar applications, few transmissive metasurfaces have been reported operating at millimeter-wave frequencies. Several secondary effects including fabrication tolerances, interlayer near-field coupling and the roughness of conductors are more severe at such high frequencies and can cause significant performance degradation. Additionally, experimental characterization techniques reported previously are not accurate enough for the verification of such effects. In this work, we present highly efficient refracting metasurfaces operating at 83 GHz. We use a sophisticated synthesis technique that minimizes possible effects of performance degradation such as interlayer near-field coupling and the influence of fabrication tolerances. Additionally, we propose a new experimental technique for the characterization of periodic metasurfaces. Using this technique, we present for the first time an accurate determination of the intensity of propagating Floquet harmonics in a broad frequency range. The proposed method gives deep insight into the beam refraction problem as it accurately quantifies in which direction energy is scattering. Additionally, it verifies our numerical model.

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Section: A Cell Architecturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-Efficiency Refracting Millimeter-Wave Metasurfaces

Olk¹,

Macchi²,

Powell

2020

IEEE Trans. Antennas Propagat.

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“…It has to be noted that, the terms SLM, LPBF and PBF-LB/M are synonyms and are terminology of AM processes defined in ISO/ASTM 52900 [189]. SLM is the most versatile form of AM and PBF-LB/M processes, and are promising techniques for producing various 3D metallic, polymers and ceramic components [190][191][192][193]. The working principle of SLM involved selective melting of metallic powder on a build platform using a laser beam.…”

Section: Laser Powder-bed Fusion Of Bmgsmentioning

confidence: 99%

Laser-based additive manufacturing of bulk metallic glasses: recent advances and future perspectives for biomedical applications

Aliyu

Panwisawas

Shinjo

et al. 2023

Journal of Materials Research and Technology

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“…Besides the well-known fabrication challenges, they have higher sensitivity to power loss compared to their microwave counterparts [71]. For instance, it has been shown in [72] that losses introduced by conductor irregularity could significantly impact the energy harvesting potential of a mmWave metasurface. Thus, further research is required to address these challenges.…”

Section: A Open Research Issues 1) Mmwave Metasurfaces For Wpt and Wehmentioning

confidence: 99%

Metasurface-Aided Wireless Power Transfer and Energy Harvesting for Future Wireless Networks

2022

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The desire for battery longevity and ubiquitous wireless charging of mobile devices is driving researchers to explore divergent strategies to extract and harness energy from ambient radio frequency (RF) signals. Different rectenna designs to convert or rectify energy from electromagnetic (EM) signals into direct current (DC) have been explored for wireless power transfer (WPT) and wireless energy harvesting (WEH). However, these rectennas are characterized by low energy capturing and RF-to-DC conversion deficiencies, complex rectifier design, and bulky size. Recently, man-made materials such as metasurfaces with unique EM properties have emerged to address these limitations of existing rectenna systems. This paper presents a comprehensive survey of not only the state-of-the-art advances in metasurface-aided WPT and WEH systems, but also their applications to emerging technologies for future wireless networks such as wireless powered communication network (WPCN), simultaneous wireless information and power transfer (SWIPT), and millimeter wave (mmWave) communication. Besides discussing the research challenges and opportunities, we also present our proposed approach of harnessing metasurface technology to enhance endto-end energy delivery in future wireless networks.

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On Surface Losses in Direct Metal Laser Sintering Printed Millimeter and Submillimeter Waveguides

Cited by 12 publications

References 9 publications

High-Efficiency Refracting Millimeter-Wave Metasurfaces

High-Efficiency Refracting Millimeter-Wave Metasurfaces

Laser-based additive manufacturing of bulk metallic glasses: recent advances and future perspectives for biomedical applications

Metasurface-Aided Wireless Power Transfer and Energy Harvesting for Future Wireless Networks

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