Diode‐switched thermal‐transfer printed antenna on flexible substrate

Kgwadi, Monageng; Drysdale, Timothy D.

doi:10.1049/el.2015.3060

Cited by 9 publications

(9 citation statements)

References 10 publications

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“…TTP is an attractive alternative to inkjet printing because it does not require sintering, thus eliminating an additional step from the tag fabrication process, saving time and money. There are opportunities for future work in the area of multiple‐pass TTP, establishing the fine resolution printing limits, and automating the assembly of printed structures that incorporate electronic elements such as switching elements that permit antenna reconfigurability [27].…”

Section: Resultsmentioning

confidence: 99%

Performance comparison of inkjet and thermal transfer printed passive ultra‐high‐frequency radio‐frequency identification tags

Kgwadi

Rizwan²,

Kutty³

et al. 2016

IET Microwaves, Antennas & Propagation

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Abstract:We compare the maximum read range of passive ultra high frequency (UHF) radio frequency identification (RFID) tags that have been produced using different metal printing techniques, specifically inkjet printing and thermal transfer printing. We used the same substrate (THERMLfilm), antenna designs, and electronic circuitry in our comparison so as to isolate the effect of the metal printing. Due to the high metal conductivity, the thermal transfer printed tags printed with copper ink performed as well or better than the inkjet printed tags printed with silver ink, even when we changed the inkjet printed tags to a Kapton substrate that is better suited to inkjet printing. The aluminium thermal transfer printed tags had up to 33% less read range than copper thermal transfer printed tags. Thermal transfer printing needs no sintering, and provides an attractive alternative low-cost fabrication method. Characterisation of the printed traces by both methods reveals that the printing techniques achieve similar surface roughness between 19.8 nm and 21.2 nm RMS. The achieved conductivities for thermal transfer printing on THERMLfilm were 2.6⇥10 7 S/m and 3.9⇥10 7 S/m for aluminium and copper films respectively while inkjet printing achieved 1.7⇥10 7 S/m conductivity on the same substrate. The best measured read range 1 for THERMLfilm was 10.6m . Across the different tag designs, the measured read ranges were 15-60% (1-10%) better for thermal printing, compared to inkjet printing on THERMLfilm (Kapton).

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Section: Resultsmentioning

confidence: 99%

Performance comparison of inkjet and thermal transfer printed passive ultra‐high‐frequency radio‐frequency identification tags

Kgwadi

Rizwan²,

Kutty³

et al. 2016

IET Microwaves, Antennas & Propagation

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“…In [94], a sensor for a Moore fractal antenna is proposed to detect partial discharge (PD) in gas-insulated substations that can work at an ultra-high frequency. In [95] a low-cost, frequency-agile triangular Sierpesnki gasket-based antenna is proposed for use by wireless sensor nodes in IoT applications. The antenna consists of PIN diodes, inductors as well as a single bias line to switch between two modes of operation.…”

Section: Fractal Antennas For Multiband Wireless Applicationsmentioning

confidence: 99%

Fractal antennas and arrays: a review and recent developments

Karmakar

2020

Int. J. Microw. Wireless Technol.

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In mathematical definition, a fractal is a self-similar subset of Euclidean space whose fractal dimension strictly exceeds its topological dimension which in turn involves a recursive generating methodology that results in contours with infinitely intricate fine structures. Fractal geometry has been used to model complex natural objects such as clouds coastlines, etc., that has space-filling properties. In the past years, several groups of scientists around the globe tried to implement the structure of fractal geometry for applications in the field of electromagnetism, which led to the development of new innovative antenna configurations called “fractal antennas” which is primarily focused in fractal antenna elements, and fractal antenna arrays. It has been demonstrated that by exploiting the recursive nature of fractals, several marvellous kinds of properties can be observed in antennas and arrays. The primary focus of this article is to provide a compressed overview of the developments in fractal-shaped antennas as well as arrays over the last few decades where the most prominent contributions mostly from IEEE journals have been highlighted. The open intention of this review work is to show an encouraging path to antenna researchers for its advancement using fractal geometries.

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“…Inkjet [1] and thermal [2] printing are two attractive additive manufacturing methods for printing antennas, as shown in our previous work [3]- [5]. Although these printing methods offer new opportunities for antenna manufacturing, the cost of printed conductor materials needs to be reduced as well.…”

Section: Introductionmentioning

confidence: 99%

Possibilities of Fabricating Copper-based RFID Tags with Photonic-sintered Inkjet Printing and Thermal Transfer Printing

Rizwan

Kutty

Kgwadi

et al. 2017

Antennas Wirel. Propag. Lett.

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Abstract-This letter studies the possibilities of manufacturing copper-based passive ultrahigh frequency (UHF) radio frequency identification (RFID) tags using inkjet and thermal printing on two substrate materials, polyimide (Kapton), and a polyester-based substrate (Flexcon THERMLfilm). Both printing methods are tested to fabricate different tag designs, and the performance of successfully printed tags is evaluated using wireless measurements. Measurement results show that both printing methods, while using copper material, can be used to effectively fabricate passive UHF RFID tag antennas on selected substrates.

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Diode‐switched thermal‐transfer printed antenna on flexible substrate

Cited by 9 publications

References 10 publications

Performance comparison of inkjet and thermal transfer printed passive ultra‐high‐frequency radio‐frequency identification tags

Performance comparison of inkjet and thermal transfer printed passive ultra‐high‐frequency radio‐frequency identification tags

Fractal antennas and arrays: a review and recent developments

Possibilities of Fabricating Copper-based RFID Tags with Photonic-sintered Inkjet Printing and Thermal Transfer Printing

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