Influence of Mutual Coupling on Stability of RCS Response in Chipless RFID

Macháč, Jan; Boussada, Amine; Švanda, Milan; Havlicek, Jaroslav; Polívka, Milan

doi:10.3390/technologies6030067

Cited by 6 publications

(2 citation statements)

References 12 publications

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“…Fig. 2 illustrates the mutual coupling effect among adjacent resonators by modeling each element as an equivalent LRC oscillating circuit [32]. The voltage source originates from the electric field radiating to the tag.…”

Section: Figure 1 Frequency Shift Coded (Fsc) Methodsmentioning

confidence: 99%

Encoding Capacity Enhancement for Chipless RFID Tag Using Resonant Frequency Placement

Le,

Dao,

Pham

et al. 2023

IEEE Access

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In this study, a novel encoding approach for chipless radio frequency identification (RFID) tags is proposed. This tag is designed with 𝑁 resonant elements, each of which can be parameterized to resonate at 𝑀 individual desired frequencies. Therefore, the number of encoded data points is ∑ 𝐶 . The introduced design concept is supported by a new mechanism to deal with the mutual coupling effect between elements, thus making the tag resonate at any desired frequency. The proposed mechanism is based on applying the particle swarm optimization (PSO) algorithm in the optimization of the tag structure parameters so that the resonant frequencies approach those determined by the user in advance. Simulation and experimental results show that the proposed approach not only overcomes one of the most troublesome pitfalls in designing chipless RFID tags, which include the limitation in data encoding capacity while keeping the tag small and uncomplex, but also changes the steps the tags are designed in such a way that the resonant frequencies can be determined before designing the tag structure.INDEX TERMS Frequency Shift Code (FSC), On/Off Keying (OOK), Chipless RFID, Particle Swarm Optimization (PSO)

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Section: Figure 1 Frequency Shift Coded (Fsc) Methodsmentioning

confidence: 99%

Encoding Capacity Enhancement for Chipless RFID Tag Using Resonant Frequency Placement

Le,

Dao,

Pham

et al. 2023

IEEE Access

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show abstract

“…Because of the closer proximity of the resonators, there is a possibility of mutual coupling, which causes the responses of the surrounding resonators in the tag to become detuned. The researchers utilized an approach that is outlined in [38,39] and is meant to limit the amount of inter-resonator mutual coupling. The goal of this strategy is to ensure that the locations of the peaks do not vary regardless of the tag that is being used.…”

Section: Design Chipless Tag With Resonatorsmentioning

confidence: 99%

Development of a New 24-bit High-Performance Chipless RFID Tag for Accurate Identification in IoT Systems

Mekki,

Necibi,

Boulejfen

et al. 2023

IEEE Access

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Chipless RFID has the potential to bring in a paradigm change in industrial applications, notably in the world of the Internet of Things (IoT). This wireless technology permits distant identification, sensing, and tracking, giving tremendous development prospects. Despite substantial advances over the previous century, designing high-performance chipless RFID for IoT applications remains a problem. This research presents a new chipless planar RFID tag for item tracking and identification in IoT systems. The suggested tag uses numerous T-shaped slow-wave structures as micro-reflecting resonators with different dimensions on a lossy substrate to encode information in the tag's backscattered signal after illumination. The mutual coupling between the resonators has been minimized to improve tag performance and printing variety. A tag with a coding capacity of 24 bits and a compact size of 60 x 40 mm 2 was simulated in CST Microwave Studio to validate the suggested approach. To create tags, several patterned configurations were applied on a Rogers RO4350B substrate, and their radar cross-section responses were studied. When compared to typical multi-resonator tags, the suggested tag design demonstrated excellent downsizing and efficient frequency spectrum usage. Furthermore, the Q-factor and coding strength were both high, showing that the suggested technology is capable of manufacturing high-performance chipless tags.INDEX TERMS Internet of Things (IoT), chipless RFID tag, slow wave structure, RCS, resonators.

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