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

Content Provider	Springer Nature Link
Author	Faul, Andre Naber, John
Copyright Year	2015
Abstract	The design and development of a radio frequency identification based pressure-sensing system to increase the range of current intra-ocular pressure sensing systems is described. Most current systems use near-field inductive coupling for the transfer of energy and data, which limits the operational range to only a few centimeters and prevents continuous monitoring. Increasing the powering range of the telemetry system offers continuous monitoring capability since the reader can be attached to a waist belt or put on a night stand when sleeping. The system operates at ultra-high frequencies and uses the electromagnetic far field to transfer energy and data, which increases the potential range of operation and allows for the use of smaller antennas. The system uses a novel electrically small antenna (ESA) to receive the incident RF signal. A four stage Schottky diode circuit rectifies and multiplies the received RF signal and provides DC power to a Colpitts oscillator. The oscillator is connected to a pressure sensor and provides an output signal frequency that is proportional to the change in pressure. The system was fabricated using a mature, inexpensive 0.5 μm CMOS process. The performance of the system compares well with current state of the art, but uses a smaller antenna and a less expensive fabrication process. The system was powered over a range of at least 6.4 cm when the ESA with a ka value of 0.096 was used as the receiving antenna for the pressure sensing system.
Starting Page	167
Ending Page	180
Page Count	14
File Format	PDF
ISSN	09251030
Journal	Analog Integrated Circuits and Signal Processing
Volume Number	85
Issue Number	1
e-ISSN	15731979
Language	English
Publisher	Springer US
Publisher Date	2015-06-19
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Electrically small antenna Energy harvesting UHF RFID Intra-ocular pressure sensing Implantable sensors Circuits and Systems Electrical Engineering Signal, Image and Speech Processing
Content Type	Text
Resource Type	Article
Subject	Surfaces, Coatings and Films Signal Processing Hardware and Architecture

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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