A novel 915 MHz, RFID-based pressure sensor for glaucoma using an electrically small antenna

Faul, Andre; Naber, John

doi:10.1007/s10470-015-0580-5

Cited by 4 publications

(1 citation statement)

References 23 publications

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“…It can be utilized to perform as wireless sensors, which are easy to manufacture, low cost, and efficient [3,[6][7][8]. Adding sensing capabilities to passive RFID tags has been widely studied [9][10][11][12][13][14], and by tracking changes in the tags' backscattered signals, passive UHF RFID tags have been used for sensing without external sensors, such as strain [15][16][17][18][19], moisture [20][21][22][23][24], pressure [25,26], and especially temperature sensors [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

A Bending Passive RFID Tag as a Sensor for High-Temperature Exposure

Khan

Chen

et al. 2021

International Journal of Antennas and Propagation

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This paper introduces a prototype of a low-energy high-temperature exposure sensor, which is a temperature-sensitive passive UHF RFID tag that bends forward when exposed to warm air. This “Bending Tag” design is based on a simple dipole antenna fabricated from an electro-textile material. The antenna has a 3D-printed substrate, which is constructed from a commercial Thermo Reactive Filament that gets soft when exposed to 50°C for 30 seconds, causing the tag to bend forward and curve. The sensor tag initially has a read range of more than 6 meters throughout the global UHF RFID frequency band. After bending, there is a significant decrease in the read range (to around 2–3 meters), which is caused by the changed backscattered power of the sensor tag. In an office environment, the backscattered power changes from −36 dBm to −43 dBm. The change in a sensor tag-reference tag system as dP% is approximately 70%. Based on these initial results, our bending tag can be further developed to work as a cost-effective low-energy sensor for monitoring high-temperature exposure.

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Section: Introductionmentioning

confidence: 99%

A Bending Passive RFID Tag as a Sensor for High-Temperature Exposure

Khan

Chen

et al. 2021

International Journal of Antennas and Propagation

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Electrically Small Antenna Advances for Current 5G and Evolving 6G and Beyond Wireless Systems

Ziolkowski

2022

Antenna and Array Technologies for Future Wireless Ecosystems

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A RF Energy Supply Method for End Nodes in Smart Buildings

Chai

et al. 2019

IEEE Access

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The application of Internet of Things in smart buildings is becoming more and more extensive. The energy supply problem of end nodes has always been a concern of the field of research and industry areas, and an adaptive radio frequency energy conversion system is proposed for the low power node of the Internet of Things. By using the unipolar transistor control, the threshold voltage of the rectifier changes dynamically, through RF matching, and double voltage rectification measures the supply for the low power nodes. The proposed circuit is aimed at reducing the threshold voltage of the transistor forward bias to increase power and output voltage of the harvester and increasing the reverse bias of the threshold voltage for reducing the leakage current. It prevents the loss of stored energy. This paper presents a 12 stages adaptive thresholdcompensated rectifier circuit has reached the maximum power conversion efficiency 35.3% at −14 dBm. Meanwhile, when the input power is −12dBm, the output voltage is 3.2 V at the output load 1 M. The low power characteristics of the nodes at the end of the Internet of Things make it possible to convert the RF energy into electric energy. INDEX TERMS Low power node, smart building, radio frequency energy harvester, energy conversion efficiency.

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A novel 915 MHz, RFID-based pressure sensor for glaucoma using an electrically small antenna

Cited by 4 publications

References 23 publications

A Bending Passive RFID Tag as a Sensor for High-Temperature Exposure

A Bending Passive RFID Tag as a Sensor for High-Temperature Exposure

Electrically Small Antenna Advances for Current 5G and Evolving 6G and Beyond Wireless Systems

A RF Energy Supply Method for End Nodes in Smart Buildings

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