| 1. |
- Amin, Yasar, et al.
(författare)
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RFID antenna humidity sensor co-design for USN applications
- 2013
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Ingår i: IEICE Electronics Express. - : Institute of Electronics, Information and Communications Engineers (IEICE). - 1349-2543. ; 10:4, s. 20130003-
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Tidskriftsartikel (refereegranskat)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 x 10.2 cm for 902-928MHz band.
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| 2. |
- Shen, Jue, et al.
(författare)
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A 180 nm-CMOS Asymmetric UWB-RFID Tag with Real-time Remote-monitored ECG-sensing
- 2015
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Ingår i: Proceedings of the International Conference on Biomedical Electronics and Devices. - : SCITEPRESS - Science and and Technology Publications. - 9789897580710 ; , s. 210-215
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Konferensbidrag (refereegranskat)abstract
- This paper proposes an asymmetric ultra-wideband - radio frequency identification (UWB-RFID) tag with electrocardiogram (ECG)-sensing capability for patients remote-monitoring in hospital environment. A UWB-RFID communication protocol is suggested for real-time transmission of undistorted ECG by interleaving ADC sampling and burst-mode UWB transmission. The proposed system shows a maximum accessing capability of 400 tags/second at 1.5 KHz ECG sampling rate with 10 Mbps UWB pulse rate. The tag consists of UHF-RFID receiver, UWB transmitter, ECG analog front-end, multi-input ADC and baseband circuitry integrated on two silicon dies. It was implemented by 6 mm2 -sized 180 nm CMOS technology. Electrodes for ECG-sensing are manufactured by inkjet-printing on polyimide substrate. Experiment results show that the tag transmits UWB pulses at 1 Mbps rate with 18 µW power. The printed electrodes conduct ECG waveform comparable to commercial electrodes.
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| 3. |
- Shen, Jue, et al.
(författare)
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Interactive UHF/UWB RFID tag for mass customization
- 2017
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Ingår i: Information Systems Frontiers. - : Springer. - 1387-3326 .- 1572-9419. ; 19:5, s. 1177-1190
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Tidskriftsartikel (refereegranskat)abstract
- Mass customization (MC) under the context of the Internet of Things (IoT) is expected to reform the traditional mass manufacturing. To contribute to MC from information communication and user interaction aspects, this work proposes an Ultra-High Frequency (UHF) RFID tag with an Impulse-Radio Ultra-Wide Band (IR-UWB) transmitter and an inkjet-printed Electrochromic (EC) display. First, compared to the conventional UHF RFID tags, the proposed tag shows the advantage of higher transmission data rate with still low power consumption. The response time in multi-tag accessing scenarios can be reduced to less than 500 ms per 1000 tags by the pipeline of the tag responses in IR-UWB link and the reader acknowledgments in UHF RFID link as well as by reducing the length of empty slots. Second, the tag is integrated with a flexible EC display manufactured by inkjet-printing on the polyimide substrate. It works as an automatically refreshed paper label that offers an intuitive human-to-device interface to improve the efficiency of the offline workers. To conquer the material variations and make use of the long retention time of the printed EC display, its threshold voltage is utilized and a feedback comparator enabling the display driver by the threshold voltage is designed. A System-on-Chip (SoC) is implemented in UMC 0.18 mu m CMOS process. According to the experimental results: 1) the IR-UWB transmitter achieves 1.02 V pulse amplitude and 900 ps pulse duration with 18 pJ/pulse energy consumption; 2) the EC display driver automatically refreshes the display when the image fades out, and consumes 1.98 mu W per 1 cm(2) display size to retain an image. The UHF/UWB RFID display tag integrated on polyimide substrate is conceptually demonstrated at the end of the paper.
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| 4. |
- Shen, Jue, et al.
(författare)
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Interactive UHF/UWB RFID Tag for Mass Customization
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Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- Mass customization (MC) under the context ofthe Internet of Things (IoT) is expected to reform traditionalmass manufacturing. To contribute to MC from information communication and user interaction aspects, this work proposes an Ultra-High Frequency (UHF) RFID tag with Impulse-Radio Ultra-Wide Band (IR UWB) transmitter and inkjet-printed Electrochromic (EC) display. First, compared to conventional UHF RFID tags, the proposed tag shows advantages of higher data rate while still keeping low power consumption. A modified communication protocol for such tag is proposed to decrease the response time in multi-tag accessing scenarios to less than 500 ms/1000 tags by the pipeline of IR UWB transmission of tag response and UHF RFID reception of reader acknowledgement and by reducingthe length of empty slots. Secondly, the tag is integrated with a flexible Electro-chromic (EC) display manufactured by inkjet-printing on the polyimide substrate. The tag with the display works as an automatically refreshed paper label which offers an intuitive human-to-device interface to improve the efficiency of the offline workers. To conquer material variation while make use of long retention time of the printed EC display, the threshold voltage of EC display is utilized and a feedback comparator is designed to start refreshing EC display based on the threshold voltage. For functional verification, a Silicon-on-Chip (SoC) is implementedin UMC 180 nm CMOS process. According to experimental results: 1) the IR UWB transmitter shows performances of 1.02 V pulse amplitude, 900 ps pulse duration and 18 pJ/pulse energy consumption; 2) the EC display driver with a feedback comparator automatically starts to refresh display when the image fades out, and reduces the power consumption for retaining image to 1.98 mW per 1 cm2 display size. The UHF/UWB RFID display tag integrated on polyimide substrate is conceptually demonstrated at the end of the paper.
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