A Pulse Distortion Approach for Decoding Frequency-Coded Tags in Multicarrier Chipless RFID Systems

In this paper, we propose a novel design of low-profile fractal chipless tags with unique specific electromagnetic responses. The tags are designed using cellular automata (Game of Life) technique to ensure the randomness of the generated fractal tags. The tags are simulated in CST Microwave Studio for the frequency range of 2 to 10 GHz. The tags are realized on FR4 substrate and their radar cross-section (RCS) characteristics are analyzed for the nine different tags for the three different polarizations (horizontal, vertical, and oblique). Each tag shows a unique signature resonance response. The obtained results of coding capacity (16-20 bits), coding spatial capacity (1-1.25 bits/cm2), coding spectral capacity (2.15-2.9 bits/GHz), and coding density (0.15-0.18 bits/GHz x cm2) of realized tags are very good. The presented tags could be used for the development of secure RFID systems.

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A feasible detection technique for chipless RFID systems based on likelihood

2014 1st Australian Microwave Symposium (AMS) ◽

10.1109/ausms.2014.7017338 ◽

2014 ◽

Author(s):

Chamath Divarathne ◽

Nemai Karmakar

Keyword(s):

Detection Technique ◽

Rfid Systems ◽

Chipless Rfid

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A maximum likelihood based tag detection technique for MIMO chipless RFID systems

2014 IEEE International Microwave and RF Conference (IMaRC) ◽

10.1109/imarc.2014.7038958 ◽

2014 ◽

Cited By ~ 1

Author(s):

Chamath Divarathne ◽

Nemai Karmakar

Keyword(s):

Maximum Likelihood ◽

Detection Technique ◽

Rfid Systems ◽

Chipless Rfid

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Chipless RFID tags and sensors: a review on time-domain techniques

Wireless Power Transfer ◽

10.1017/wpt.2015.10 ◽

2015 ◽

Vol 2 (2) ◽

pp. 62-77 ◽

Cited By ~ 15

Author(s):

Mohammadali Forouzandeh ◽

Nemai Chandra Karmakar

Keyword(s):

Time Domain ◽

Radio Frequency Identification ◽

Time Domain Reflectometry ◽

Ultra Wideband ◽

Rfid Tags ◽

Data Encoding ◽

The Past ◽

Rfid Systems ◽

Chipless Rfid ◽

Frequency Identification

In the past few years Radio Frequency Identification(RFID)has grown to be one of the most popular technologies in the area of identification systems. Following a brief survey of RFID systems, this paper provides a technical review of work undertaken in the field of time-domain chipless RFID tags and sensors. This paper aims not only to address the chipless tags which use Time Domain Reflectometry (TDR) concept for data encoding but also for the use of Ultra-Wideband Impulse-Radar (UWB-IR) as a time-domain measurement technique. The penultimate section intends to focus on time-domain reading setups and finally, a brief comparison between this method and other chipless techniques is provided.

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