A miniaturized low-profile two-bit QPSK metamaterial inspired phase modulated chipless RFID tag

RFID is a non-contact automatic identification technology, which automatically identifies target objects and obtains relevant data by radio frequency (RF) signals without manual intervention. However, the high cost and difficulty to fabricate comparing with barcodes limits RFID tags to replace b...

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Main Author: Yang, Zhenning
Other Authors: Muhammad Faeyz Karim
Format: Theses and Dissertations
Language:English
Published: 2018
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Online Access:http://hdl.handle.net/10356/75988
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-759882023-07-04T15:55:45Z A miniaturized low-profile two-bit QPSK metamaterial inspired phase modulated chipless RFID tag Yang, Zhenning Muhammad Faeyz Karim School of Electrical and Electronic Engineering DRNTU::Engineering::Electrical and electronic engineering RFID is a non-contact automatic identification technology, which automatically identifies target objects and obtains relevant data by radio frequency (RF) signals without manual intervention. However, the high cost and difficulty to fabricate comparing with barcodes limits RFID tags to replace barcodes. Chipless RFID tags refer to RFID tags that do not contain silicon chips which mainly have advantages of low cost and ease to fabricate. In this thesis a vialess passive two-bit metamaterial based Quadrature Phase Shift Keying (QPSK) modulated Chipless RFID tag operating at 2.4 GHz is presented. Based on QPSK modulation, there are four different phase changes of the tag backscattered signal over a period of time. These four phase changes correspond four QPSK symbols by using four independent phase modulating sections which have unique reflection coefficients. The compact CRLH based vialess antenna is an open end zeroth order resonating antenna which is an open end CRLH transmission line(TL) structure with a 0.286λ0*0.168λ0*0.0065λ0 size at 2.4GHz. The time delay of vialess structure is realized by CRLH delay lines which proved to be very useful in reducing the overall size of the circuit while offering significantly longer delays at lower frequencies [1] comparing with conventional right hand true time delay lines. The composed CRLH delay line provides a 3ns time delay. SRRs and CSRRS are used as discontinuities to achieve abrupt phase changes of backscattered signals. The dimensions of the Chipless tag is 0.32λ0*0.546λ0*0.0065λ0. This Chipless RFID can be used by connected with temperature sensor as well [40] . Measurement and simulation results show that the proposed Chipless RFID tag is compact and delivers the desired performance. Master of Science (Communications Engineering) 2018-09-11T13:27:25Z 2018-09-11T13:27:25Z 2018 Thesis http://hdl.handle.net/10356/75988 en 73 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Electrical and electronic engineering
spellingShingle DRNTU::Engineering::Electrical and electronic engineering
Yang, Zhenning
A miniaturized low-profile two-bit QPSK metamaterial inspired phase modulated chipless RFID tag
description RFID is a non-contact automatic identification technology, which automatically identifies target objects and obtains relevant data by radio frequency (RF) signals without manual intervention. However, the high cost and difficulty to fabricate comparing with barcodes limits RFID tags to replace barcodes. Chipless RFID tags refer to RFID tags that do not contain silicon chips which mainly have advantages of low cost and ease to fabricate. In this thesis a vialess passive two-bit metamaterial based Quadrature Phase Shift Keying (QPSK) modulated Chipless RFID tag operating at 2.4 GHz is presented. Based on QPSK modulation, there are four different phase changes of the tag backscattered signal over a period of time. These four phase changes correspond four QPSK symbols by using four independent phase modulating sections which have unique reflection coefficients. The compact CRLH based vialess antenna is an open end zeroth order resonating antenna which is an open end CRLH transmission line(TL) structure with a 0.286λ0*0.168λ0*0.0065λ0 size at 2.4GHz. The time delay of vialess structure is realized by CRLH delay lines which proved to be very useful in reducing the overall size of the circuit while offering significantly longer delays at lower frequencies [1] comparing with conventional right hand true time delay lines. The composed CRLH delay line provides a 3ns time delay. SRRs and CSRRS are used as discontinuities to achieve abrupt phase changes of backscattered signals. The dimensions of the Chipless tag is 0.32λ0*0.546λ0*0.0065λ0. This Chipless RFID can be used by connected with temperature sensor as well [40] . Measurement and simulation results show that the proposed Chipless RFID tag is compact and delivers the desired performance.
author2 Muhammad Faeyz Karim
author_facet Muhammad Faeyz Karim
Yang, Zhenning
format Theses and Dissertations
author Yang, Zhenning
author_sort Yang, Zhenning
title A miniaturized low-profile two-bit QPSK metamaterial inspired phase modulated chipless RFID tag
title_short A miniaturized low-profile two-bit QPSK metamaterial inspired phase modulated chipless RFID tag
title_full A miniaturized low-profile two-bit QPSK metamaterial inspired phase modulated chipless RFID tag
title_fullStr A miniaturized low-profile two-bit QPSK metamaterial inspired phase modulated chipless RFID tag
title_full_unstemmed A miniaturized low-profile two-bit QPSK metamaterial inspired phase modulated chipless RFID tag
title_sort miniaturized low-profile two-bit qpsk metamaterial inspired phase modulated chipless rfid tag
publishDate 2018
url http://hdl.handle.net/10356/75988
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