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Non-Linearities in Passive RFID

Non-Linearities in Passive RFID

Authors
Publisher ISTE
Year 01/01/2018
Edition First
Pages 192
Version hardback
Readership level Professional and scholarly
Language English
ISBN 9781786302267
Categories Electricity, electromagnetism & magnetism, Radio technology
$160.94 (with VAT)
625.91 PLN / €144.01 / £133.38
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Book description

This book concerns a new paradigm in the field of UHF RFID systems: the positive exploitation of nonlinear signals generated by the chips integrated into the RFID tags. After having recalled the main principles in RFID technology and its current challenges notably with the emergence of Internet of Things or the smart connected environments, the purpose is to focus on the presence of nonlinearities produced by the nonlinear circuits of RFID chips: effects, nuisances and solutions but also and especially use of the phenomena. The presentation covers all aspects from the characterization of the nonlinear behavior of RFID tags and the associated platforms (distinguishing conducted and radiated measurement) to the design of new types of tags where nonlinearities are exploited in order to offer new capabilities or enhanced performance.

Non-Linearities in Passive RFID

book_contentlist

Acknowledgments ix


Introduction xi


Chapter 1 History of Radio-frequency Identification: From Birth to Advanced Applications 1


1.1 Early facts about the genesis of RFID 1


1.2 Birth of RFID 2


1.3 Early modern RFID 4


1.4 The 1970s: The infancy age of RFID 7


1.5 The 1980s and 1990s: Implementation of RFID 8


1.6 RFID chip age 10


1.7 Maturation of RFID 11


1.8 Internet of Things: The next RFID frontier 15


1.9 Summary 19


Chapter 2 RFID Technology: Main Principles and Non-linear Behavior of Tags 21


2.1 RFID: A multilayer vision 21


2.2 Focus on passive UHF RFID technology 23


2.2.1 Working principle 23


2.2.2 Reader 24


2.2.3 Tag 25


2.3 Non-linear RF networks and harmonic generation 29


2.3.1 Effects of a non-linear device 29


2.3.2 Theory on the effects of a non-linear device 29


2.4 Non-linear behavior and associated applications in the RFID field 32


2.4.1 Measurement of backscattered harmonics 32


2.4.2 Wireless sensor tags 33


2.5 Summary 37


Chapter 3 Characterization Platforms for Passive RFID Chips and Tags 39


3.1 Introduction 39


3.2 Measuring the backscattered tag response 41


3.2.1 Harmonic backscattering 41


3.2.2 Measurement techniques 41


3.2.3 RFID air interface 42


3.2.4 Configuration of the physical layer in the UHF RFID system 43


3.3 Characterization of RFID tags - radiated measurements 45


3.3.1 Tags under test 46


3.3.2 Measurement system 46


3.3.3 Power budget 47


3.3.4 Power tag sensitivity 48


3.3.5 Radar cross-section and physical surface of a tag 49


3.3.6 Optimized PSD analysis of the RFID communication 52


3.3.7 Dependency analysis of harmonic scattering 58


3.3.8 Limitations of tag characterization by radiated measurements 65


3.4 Characterization of RFID chips-conducted measurements 66


3.4.1 Non-linear characterization platform 68


3.4.2 System operation description 68


3.4.3 Activation threshold and impedance measurement 72


3.4.4 Harmonic characterization 75


3.4.5 Result exploitation 79


3.5 Summary 80


Chapter 4 Modeling the Harmonic Signals Produced by RFID Chips 81


4.1 Introduction 81


4.2 Analysis of harmonic currents in RFID chips 82


4.2.1 Review of Dickson analysis 82


4.2.2 Calculation of the harmonic currents 84


4.3 Third harmonic in traditional RFID tags 88


4.3.1 Impedance matching network for f0 88


4.3.2 Influence of Q in the backscattered signal at 3f0 89


4.4 How to profit from the third harmonic signal 93


4.4.1 Dual-band impedance matching network 93


4.4.2 Backscattered signal at 3f0 by the HT 95

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