Reducing mutual coupling in chipless rfid tags composed of U‐folded dipole scatterers

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

doi:10.1002/mop.30138

Cited by 10 publications

(19 citation statements)

References 13 publications

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“…The paper further compares predicted and measured RCS response of the tag composed of U-folded dipoles presented in Reference [1] with recently proposed tapered U-folded dipoles [8] and with the tag composed of resonators rearranged in their positions [9]. Based on that evidence, the advantage of the tags with reduced mutual coupling between neighboring resonators is shown.…”

Section: Introductionmentioning

confidence: 85%

“…The geometry of the recently proposed uniplanar strip scatterer with tapered arms [8] was originally inspired by the U-folded dipole presented in Reference [1]. All scatterers were designed on the low loss substrate Rogers RO4003 (ε r = 3.38, tgδ = 0.002) of the thickness 0.2 mm.…”

Section: Tags With Reduced Inter Element Couplingmentioning

confidence: 99%

“…Figure 1a shows the original U-folded dipole (UD) that has the outer size 20 × 2.5 mm with the strip width 1 mm and the gap size 0.5 mm in accordance with Reference [1]. The tapered U-folded dipole (T-UD) of the same outer size is depicted in Figure 1b This paper employs a simple equivalent circuit model (ECM) (originally proposed in [11]) of the RFID tag composed of an array of U-folded dipoles [8,9] to predict and study its RCS response. RCS at each frequency is related to currents flowing in individual coupled resonant circuits representing original tag scatterers.…”

Section: Tags With Reduced Inter Element Couplingmentioning

confidence: 99%

“…The width of arms is 1 mm. This paper employs a simple equivalent circuit model (ECM) (originally proposed in [11]) of the RFID tag composed of an array of U-folded dipoles [8,9] to predict and study its RCS response. RCS at each frequency is related to currents flowing in individual coupled resonant circuits representing original tag scatterers.…”

Section: Tags With Reduced Inter Element Couplingmentioning

confidence: 99%

“…We have proposed two ways for reducing the mutual coupling. This includes increasing the distance between resonators by tapering their arms [8] and rearranging positions of resonators in the tag [9]. In this scenario, the resonators with neighboring resonant frequencies are located at a higher distance, which means their coupling is reduced.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2018

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The paper investigates the influence of mutual coupling between individual scatterings of chipless Radio Frequency Identification (RFID) tags based on its frequency-domain performance using a simplified equivalent circuit model. The proposed steady state analysis predicts a fast and satisfactory amplitude level and frequency position of resonant peaks of a predicted radar cross section (RCS) response. The proposed approach is capable of pre-evaluating a suitability of the particular scattered topology for implementing in chipless RFID tags. It is demonstrated on two different geometries.

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Section: Introductionmentioning

confidence: 85%

Section: Tags With Reduced Inter Element Couplingmentioning

confidence: 99%

Section: Tags With Reduced Inter Element Couplingmentioning

confidence: 99%

Section: Tags With Reduced Inter Element Couplingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2018

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Compact multi‐band chipless RFID resonators for identification and authentication applications

Babaeian

Karmakar

2020

Electron. lett.

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Moving towards commercialisation of chipless RFID systems, there are still some pressing issues. In the tag design level, the issues are high data capacity in the order of tens of bits, compact design and the immunity to the interference which can be achieved by a cross-polar response. It is demanded to yield the highest numbers of bits in a tag ID while the occupied physical space and allocated bandwidth are minimised. Increasing the number of resonators in a conventional multi-resonator chipless tag causes a significant tag size growth. The destructive coupling effect between resonators in multi-resonator tags is another critical issue. In this Letter, to combat those issues, a multi-band resonator is proposed. The comb-shaped tags contain both co-polar and crosspolar Radar cross section (RCS) responses, hence they can be used in high reflective environments. Two samples of 14-bit and 40-bit combshaped tags are designed, which have physical sizes of 17 mm × 13 and 30 mm × 45 mm, respectively. The promising performance of the proposed structure, which is beyond the state of art hybrid and frequency-domain tags, shows the potential of the proposed designs for identification and authentication applications.

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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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Reducing mutual coupling in chipless rfid tags composed of U‐folded dipole scatterers

Cited by 10 publications

References 13 publications

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

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

Compact multi‐band chipless RFID resonators for identification and authentication applications

Encoding Capacity Enhancement for Chipless RFID Tag Using Resonant Frequency Placement

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