Low-Cost, Ubiquitous RFID-Tag-Antenna-Based Sensing

Bhattacharyya, Rahul; Floerkemeier, Christian; Sarma, Sanjay E.

doi:10.1109/jproc.2010.2051790

Cited by 149 publications

(70 citation statements)

References 23 publications

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“…RFID tag antennas coated with a sensing film or when brought in proximity of metals/dielectric result in change in the read rate, operating range and turn-on power of the tag. These changes can be detected to develop humidity sensors [6], displacements sensors, and temperature sensors [7]. However, tag antenna based sensing has very limited resolution and is limited to slowly varying quantities.…”

Section: B Analog Backscatter Sensingmentioning

confidence: 99%

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Hybrid analog-digital backscatter: A new approach for battery-free sensing

Talla

Smith

2013

2013 IEEE International Conference on RFID (RFID)

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Abstract-After comparing the properties of analog backscatter and digital backscatter, we propose that a combination of the two can provide a solution for high data rate battery free wireless sensing that is superior to either approach on its own. We present a hybrid analog-digital backscatter platform that uses digital backscatter for addressability and control but switches into analog backscatter mode for high data rate transmission of sensor data.Using hybrid backscatter, we report the first digitally addressable real-time battery free wireless microphone. We develop the hybrid backscatter platform by integrating an electret microphone and RF switch with a digital RFID platform (WISP). The hybrid WISP operates by default in digital mode, transmitting and receiving digital data using the EPC Gen 2 RFID protocol but switching into analog mode to backscatter audio sensor data when activated by Gen 2 READ command. The data is recovered using a USRP-based Software Defined RFID reader. We report an operating range of 7.4 meters for the analog backscatter microphone and 2.7 meters for hybrid microphone with 26.7 dBm output power USRP-based RFID reader.

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Section: B Analog Backscatter Sensingmentioning

confidence: 99%

“…Traditional approaches to analog backscatter use the antenna as the sensing element [6], [7]. However, our approach to analog backscatter sensing (as shown in Figure 2(b)) consists of a sensor (passive or active) directly connected to the terminals of the antennas.…”

Section: B Backscatter Communicationmentioning

confidence: 99%

Hybrid analog-digital backscatter: A new approach for battery-free sensing

Talla

Smith

2013

2013 IEEE International Conference on RFID (RFID)

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“…In [7]- [10], a change in a physical parameter that needs to be sensed at an RFID tag is translated to an analog variation in the received signal strength indicator (RSSI) or response frequency at an RFID reader. This method only allows sensing of a few discrete levels or threshold violations in the sensed parameter.…”

Section: Introductionmentioning

confidence: 99%

A novel communication method for semi-passive RFID based sensors

Kalansuriya

Bhattacharyya

2014

2014 IEEE International Conference on Communications (ICC)

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Abstract-This paper presents a novel communication method for semi-passive RFID based sensors. The new method uses a digitally reconfigurable UHF RFID tag antenna to modulate sensed information at an RFID tag on to the received signal strength indicator (RSSI) response perceived at an RFID reader. This technique is completely compatible with the existing class 1 generation 2 UHF air interface protocol thereby enabling the use of existing RFID reader infrastructure to decode the additional sensed information. The effect of read distance, environment and bit duration on the performance of the communication method is examined through measurements obtained from a prototype. Through experimental verification, it is demonstrated that error free transmission of sensor information can be achieved up to 3.5 meters in different environments with a bit duration of 500 ms. Prospective future research directions are also discussed.

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“…RFID faces several critical challenges of cost, reliability and eco-friendliness when evaluating, planning and implementing it for most exciting unfolding era of Ubiquitous Sensor Networks (USN). However, the present sensor-enabled RFID solutions downgrade their effectiveness on account of extra cost [1] by employing additional components or materials [2,3,4] to achieve sensor module. Likewise, the vast fated implementation of sensor nodes demands a design with the capability of customizable calibration function in order to replicate it without additional costs.…”

Section: Introductionmentioning

confidence: 99%

RFID antenna humidity sensor co-design for USN applications

Amin

Feng

Chen

et al. 2013

IEICE Electron. Express

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Abstract:We demonstrate for the first time an RFID tag antenna which itself is humidity sensor and also provides calibration functionality. The antenna is comprised of T-matching network and horizontally meandered lines for impedance matching and reliable near-field communication. The novel contour design provides humidity sensing, and calibration functions whilst concurrently acts as a radiating element along with quadrangular capacitive tip-loading with covered middle portion for far-field communication. The inkjet printed prototypes of the antenna provide effective ambient humidity sensing while demonstrating stable RFID communication. The antenna has a compact size of 1.1 × 10.2 cm for 902-928 MHz band.

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Low-Cost, Ubiquitous RFID-Tag-Antenna-Based Sensing

Abstract: The authors of this paper propose a means for providing low-cost, long-lifetime temperature-threshold sensing, displacement sensing, and fluid level sensing for RFID systems.

Cited by 149 publications

References 23 publications

Hybrid analog-digital backscatter: A new approach for battery-free sensing

Hybrid analog-digital backscatter: A new approach for battery-free sensing

A novel communication method for semi-passive RFID based sensors

RFID antenna humidity sensor co-design for USN applications

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