Long reading range for the frequency coded Chipless RFID system based on reflectarray antennas

Khaliel, Maher; El-Awamry, Ahmed; Fawky, Abdelfattah; Kaiser, Thomas

doi:10.1017/s1759078718000442

Cited by 15 publications

(4 citation statements)

References 14 publications

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“…where G T is the tag antenna gain, and IL( f ) is the filter insertion loss which varies with frequency. For both tag types, the reading methodology which is presented in [28] is utilized. This methodology is applied to the RCS tags where the RCS value of the peak is considered to be −10 dBsm, and the RCS value of the notch is −30 dBsm.…”

Section: Reading Rangementioning

confidence: 99%

Frequency-Coded Chipless RFID Tags: Notch Model, Detection, Angular Orientation, and Coverage Measurements

Alam

Khaliel

Fawky

et al. 2020

Sensors

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This paper focuses on the frequency coded chipless Radio Frequency Identification (RFID) wherein the tag’s information bits are physically encoded by the resonators’ notch position which has an effect on the frequency spectrum of the backscattered or retransmitted signal of the tag. In this regard, the notch analytical model is developed to consider the notch position and quality factor. Besides, the radar cross section (RCS) mathematical representation of the tag is introduced to consider the incident wave’s polarization and orientation angles. Hence, the influences of the incident wave’s orientation and polarization mismatches on the detection performance are quantified. After that, the tag measurement errors and limitations are comprehensively explained. Therefore, approaches to measureing RCS- and retransmission-based tags are introduced. Furthermore, the maximum reading range is theoretically calculated and practically verified considering the Federal Communications Commission (FCC) Ultra Wideband (UWB) regulations. In all simulations and experiments conducted, a mono-static configuration is considered, in which one antenna is utilized for transmission and reception.

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Section: Reading Rangementioning

confidence: 99%

Frequency-Coded Chipless RFID Tags: Notch Model, Detection, Angular Orientation, and Coverage Measurements

Alam

Khaliel

Fawky

et al. 2020

Sensors

Self Cite

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show abstract

“…The 15 cm reading distance demonstrated in this work may not be the best for real applications. Thus, the reading range could be improved by increasing the gain and directivity of the reader antennas, such as using reflectarray antennas [46]. Nevertheless, the bulkiness of reader antennas should also be considered in the efforts to improve the reading range.…”

Section: Further Discussionmentioning

confidence: 99%

Chipless RFID sensor for corrosion characterization based on frequency selective surface and feature fusion

Marindra

Tian

2020

Smart Mater. Struct.

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Chipless RFID sensors attract attention to structural health monitoring (SHM) because of its advantages of being low-cost, wireless, passive, and having multiple resonances for sensing. Its application for corrosion sensing, however, receives little attention and faces challenges in terms of sensitivity and reliability. This paper proposes a chipless RFID sensor for corrosion characterization based on frequency selective surface (FSS) and feature fusion. An FSS pattern on a substrate is designed to generate three resonances within 2-6 GHz. The ability of the FSS to characterize corrosion thickness was simulated and validated in the experiments. The experimental results using dedicated corrosion undercoating samples show that the FSS based chipless RFID sensor can be used to characterize corrosion, where the three resonance frequency features provide sensitivity and consistent monotonic relations to the corrosion progression. Furthermore, feature fusion using simple sum and confidence weighted averaging (CWA) can enhance the sensitivity and reliability of the sensor. With the lowprofile and printability of the sensor, this work paves the way for smart coatings for corrosion sensing and monitoring on metallic structures.

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“…The current short distance may not be suitable for large-scale applications in SHM. Increasing the gain and directivity of the reader antenna can improve the reading distance but increase the volume of the reader [ 100 , 120 ]. The cross-polarization reading and depolarizing sensor can reduce inevitable environmental reflections [ 95 ].…”

Section: Technical Challenges and Solutionsmentioning

confidence: 99%

A Review of Radio Frequency Identification Sensing Systems for Structural Health Monitoring

et al. 2022

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Structural health monitoring (SHM) plays a critical role in ensuring the safety of large-scale structures during their operational lifespan, such as pipelines, railways and buildings. In the last few years, radio frequency identification (RFID) combined with sensors has attracted increasing interest in SHM for the advantages of being low cost, passive and maintenance-free. Numerous scientific papers have demonstrated the great potential of RFID sensing technology in SHM, e.g., RFID vibration and crack sensing systems. Although considerable progress has been made in RFID-based SHM, there are still numerous scientific challenges to be addressed, for example, multi-parameters detection and the low sampling rate of RFID sensing systems. This paper aims to promote the application of SHM based on RFID from laboratory testing or modelling to large-scale realistic structures. First, based on the analysis of the fundamentals of the RFID sensing system, various topologies that transform RFID into passive wireless sensors are analyzed with their working mechanism and novel applications in SHM. Then, the technical challenges and solutions are summarized based on the in-depth analysis. Lastly, future directions about printable flexible sensor tags and structural health prognostics are suggested. The detailed discussion will be instructive to promote the application of RFID in SHM.

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Long reading range for the frequency coded Chipless RFID system based on reflectarray antennas

Cited by 15 publications

References 14 publications

Frequency-Coded Chipless RFID Tags: Notch Model, Detection, Angular Orientation, and Coverage Measurements

Frequency-Coded Chipless RFID Tags: Notch Model, Detection, Angular Orientation, and Coverage Measurements

Chipless RFID sensor for corrosion characterization based on frequency selective surface and feature fusion

A Review of Radio Frequency Identification Sensing Systems for Structural Health Monitoring

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