Effect of Material Properties on a Subdermal UHF RFID Antenna

Chrysler, Andrew; Furse, Cynthia; Hall, Kaitlin; Chung, Youchung

doi:10.1109/jrfid.2018.2791919

Cited by 18 publications

(5 citation statements)

References 30 publications

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“…Lower values of S11 indicate higher received power (higher probability of receiving a channel at its designated frequency). As per the literature, return loss of less than 10 dB indicates an acceptable sensitivity. , Antennas on PET provided a better response in the upper VHF band.…”

Section: Resultssupporting

confidence: 55%

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Formulation of Screen-Printable Cu Molecular Ink for Conductive/Flexible/Solderable Cu Traces

Deore

Paquet

Kell

et al. 2019

ACS Appl. Mater. Interfaces

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Screen printing is the most common method used for the production of printed electronics. Formulating copper (Cu) inks that yield conductive fine features with oxidation and mechanical robustness on low-temperature substrates will open up opportunities to fabricate cost-effective devices. We have formulated a screen-printable Cu metal-organic decomposition (MOD) ink comprising Cu formate coordinated to 3-(diethylamino)-1,2-propanediol, a fractional amount of Cu nanoparticles (CuNPs), and a binder. This simple formulation enables ∼70–550 μm trace widths with excellent electrical [∼8–15 mΩ/□/mil or 20–38 μΩ·cm] and mechanical properties with submicron-thick traces obtained by intense pulse light (IPL) sintering on Kapton and poly(ethylene terephthalate) (PET) substrates. These traces are mechanically robust to flexing and creasing where less than 10% change in resistance is observed on Kapton and ∼20% change is observed on PET. Solderable Cu traces were obtained only with the combination of the Cu MOD precursor, CuNP, and polymer binder. Both thermally and IPL sintered traces showed shelf stability (<10% change in resistance) of over a month in ambient conditions and 10–70% relative humidity, suitable for day-to-day fabrication. To demonstrate utility, light-emitting diodes (LEDs) were directly soldered to IPL sintered Cu traces in a reflow oven without the need for a precious metal interlayer. The LEDs were functional not only during bending and creasing of the Cu traces but even after 180 min at 140 °C in ambient air without losing illumination intensity. High definition television antennas printed on Kapton and PET were found to perform well in the ultrahigh frequency region. Lastly, single-walled carbon nanotube-based thin-film transistors on a silicon wafer were fabricated with a screen-printed Cu source and drain electrodes, which performed comparably to silver electrodes with mobility values of 12–15 cm2 V−1 s−1 and current on/off ratios of ∼105 and as effective ammonia sensors providing parts per billion-level detection.

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Section: Resultssupporting

confidence: 55%

“…As per the literature, return loss of less than 10 dB indicates an acceptable sensitivity. 64,65 Antennas on PET provided a better response in the upper VHF band.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Formulation of Screen-Printable Cu Molecular Ink for Conductive/Flexible/Solderable Cu Traces

Deore

Paquet

Kell

et al. 2019

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…In polymer thick film technology, the usage of conductive paste as substrate is due to improved electrical performance of printed RFID antennas even though the conductive paste gives rise to increase in resistance [5]. is technology works well at low temperatures on cost-effective substrates, especially in membrane keyboards and electromagnetic shielding to avoid electromagnetic interferences in the miniaturized electronic devices.…”

Section: Composite Materials In Rfids As Radiating Element and Substratesmentioning

confidence: 99%

[Retracted] Characterization of Composite RFID Antennas Based on Thermal Properties: A Survey

Varadhan

Chamatu

Subramanian

2021

Advances in Materials Science and Engineering

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In this paper, a comprehensive survey on thermal and geometric design parameters of composite materials utilized in the fabrication of modern RFID systems has been discussed mainly due to its advantages such as lightweight and high strength. Designing of RF antenna setup requires careful consideration of material, geometric and fabrication parameters. Polymer materials were chosen as the substrate and subjected to extensive studies to determine and predict the capability of the miniaturized RFID antenna. The effect of the polymer matrix composite (PMC) material on the antenna parameters such as gain, bandwidth, and return loss is analyzed and realized that improvement in bandwidth and perfection in impedance matching can be further accomplished by employing fractal structure. It is also discovered that the thermal properties affect the impedance and operating frequencies, thus enabling multilayer PMC deploying fractal structured RFID antennas to be used for many applications such as logistics, aerospace, biomedical, and mining.

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“…8-9, the return losses of the GC switches are greater than those of the GS switches and silver switches. At high frequencies, when the conductivity of metal increases, the reflection increases, and the return losses decrease [27][28]. For silver and GS switches, the difference is not very important because the current flows through the silver in the first four bands for both switches, as shown in Fig.…”

Section: Comparison Between the Return Losses Of The Switchesmentioning

confidence: 99%

Quantitative and Qualitative Characterization of Coatings Added to Low Voltage Switches

Troudi

Jelassi

2022

Adv. technol. innov.

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Electroplating is one of the most important processes in the manufacturing of switches. Coating the conductive parts of switches improves their appearance and increases their durability, even in severe environments. This study proposes a non-destructive testing method to qualitatively and quantitatively characterize coatings added to the conductive parts of low voltage switches (contacts and terminals). The method is based on the injection of a high-frequency signal into a switch using the vector network analyzer (VNA). An in-depth analysis of the reflected signal is conducted to characterize the coatings. For the quantitative characterization, a comparison is made between switches that are plated with different coating thicknesses. As for the qualitative characterization, a comparison is made between switches that are manufactured with different types of metals. The results show that each switch type has an electromagnetic signature that varies according to the conductivity and the thickness of the metals used for coating.

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Effect of Material Properties on a Subdermal UHF RFID Antenna

Cited by 18 publications

References 30 publications

Formulation of Screen-Printable Cu Molecular Ink for Conductive/Flexible/Solderable Cu Traces

Formulation of Screen-Printable Cu Molecular Ink for Conductive/Flexible/Solderable Cu Traces

[Retracted] Characterization of Composite RFID Antennas Based on Thermal Properties: A Survey

Quantitative and Qualitative Characterization of Coatings Added to Low Voltage Switches

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