Capacitively-tuned split microstrip resonators for RFID barcodes

Jalaly, I.; Robertson, I.D.

doi:10.1109/eumc.2005.1610138

Cited by 124 publications

(64 citation statements)

References 5 publications

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“…The received and transmitted signals are cross-polarized in order to achieve good isolation between the two. Due to these differences, we believe to have achieved less mutual coupling effects, greater number of possible bits, and easier encoding than reported in [7] and [8].…”

mentioning

confidence: 77%

“…We have reported preliminary results on our system, but only focusing on the proof of concept [13]. The main differences between our system and the ones reported in [7], [8], and [13] are that we encode data in both amplitude and phase, show the possibility of designing a UWB chipless tag, and that the system is not based on radar cross section (RCS) backscattering, but on retransmission of the interrogation signal with the encoded unique spectral ID. The received and transmitted signals are cross-polarized in order to achieve good isolation between the two.…”

mentioning

confidence: 99%

“…Fully printable chipless RFID tags have been reported using space-filling curves [7] and capacitively tuned dipoles [8]. The space-filling curves require considerable layout modifications for data encoding, while capacitively tuned dipoles could have undesired parasitic mutual coupling effects and size limitations restricting efficient data encoding.…”

mentioning

confidence: 99%

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Multiresonator-Based Chipless RFID System for Low-Cost Item Tracking

Preradovic

Balbin

Karmakar

et al. 2009

IEEE Trans. Microwave Theory Techn.

432

212

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A fully passive printable chipless RFID system is presented. The chipless tag uses the amplitude and phase of the spectral signature of a multiresonator circuit and provides I : 1 correspondence of data bits. The tag comprises of a microstrip spiral multiresonator and cross-polarized transmitting and receiving microstrip ultra-wideband disc loaded monopole antennas. The reader antenna is a log periodic dipole antenna with average 5.5-dBi gain. Firstly, a 6-bit chipless tag is designed to encode 000000 and 010101 IDs. Finally, a 35-bit chipless tag based on the same principle is presented. The tag has potentials for low-cost item tagging such as banknotes and secured documents. Abstract-A fully passive printable chipless RFID system is presented. The chipless tag uses the amplitude and phase of the spectral signature of a multiresonator circuit and provides 1 : 1 correspondence of data bits. The tag comprises of a microstrip spiral multiresonator and cross-polarized transmitting and receiving microstrip ultra-wideband disc loaded monopole antennas. The reader antenna is a log periodic dipole antenna with average 5.5-dBi gain. Firstly, a 6-bit chipless tag is designed to encode 000000 and 010101 IDs. Finally, a 35-bit chipless tag based on the same principle is presented. The tag has potentials for low-cost item tagging such as banknotes and secured documents.

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confidence: 77%

mentioning

confidence: 99%

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Multiresonator-Based Chipless RFID System for Low-Cost Item Tracking

Preradovic

Balbin

Karmakar

et al. 2009

IEEE Trans. Microwave Theory Techn.

432

212

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“…Thus the S 11 parameters at the input port of the sensor will reflect the pressure as well. In [29][30][31], it was demonstrated that the reflected signal frequency or time domain information changes with S 11 . By modulating the S 11 magnitude or phase, pressure information can be effectively transmitted through the RF signal.…”

Section: Wireless Transmissionmentioning

confidence: 99%

A wireless low-range pressure sensor based on P(VDF-TrFE) piezoelectric resonance

Kan

2010

Sensors and Actuators A: Physical

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A low-range bio-compatible pressure sensor based on P(VDF-TrFE) piezoelectric resonance has been tested and integrated to a wireless platform. Many critical physiological applications and in-vivo diagnosis require highly sensitive pressure monitoring in the 0-100kPa range, with negligible long-term drift and robust integration platform. The PVDF film and its copolymers exhibit significant piezoelectric properties after poling. P(VDF-TrFE) is preferred for its flexible film structure, low modulus, high yield strength and resistance to corrosive chemicals. All piezoelectric materials are lossy and thus the leakage current will cause drift of instantaneous response, which limits the direct use of piezoelectric charges in sensing.In this paper, the pressure sensor which adopts the appropriate properties of P(VDFTrFE) for low pressure levels, works as an acoustic wave resonator to avoid long-term

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“…Concerning chipless RFID tags, the interest in this work, transmission lines loaded with multiple resonant elements, each tuned to a different frequency, have been proposed as multi-resonant frequency domain based tags [31][32][33][34][35][36][37][38][39][40][41][42][43][44]. In such chipless-RFID systems, the interrogation signal is a multi-frequency sweeping signal covering the spectral bandwidth of the resonant elements, and the ID code is inferred from the dips present in the frequency response (retransmission based tags) [31][32][33][34][35][36][37] or in the radar cross section response (backscattered tags) [38][39][40][41][42][43][44], caused by the resonant elements. Therefore, the presence or absence of dips at predefined frequencies (each one corresponding to a different bit) is associated with the logic state '1' or '0'.…”

Section: Introductionmentioning

confidence: 99%

High data density and capacity in chipless radiofrequency identification (chipless-RFID) tags based on double-chains of S-shaped split ring resonators (S-SRRs)

et al. 2017

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Abstract. The data density per surface (DPS) is a figure of merit in chipless radiofrequency identification (chipless-RFID) tags. In this paper, it is demonstrated that chipless-RFID tags with high DPS can be implemented by using double-chains of S-shaped split ring resonators (S-SRRs). Tag reading is achieved by near-field coupling between the tag and the reader, a CPW transmission line fed by a harmonic signal tuned to the resonance frequency of the S-SRRs. By transversally displacing the tag over the CPW, the transmission coefficient of the line is modulated by tag motion. This effectively modulates the amplitude of the injected (carrier) signal at the output port of the line, and the identification (ID) code, determined by the presence or absence of S-SRRs at predefined and equidistant positions in the chains, is contained in the envelope function. The DPS is determined by S-SRR dimensions and by the distance between S-SRRs in the chains. However, by using two chains of S-SRRs, the number of bits per unit length that can be accommodated is very high. This chipless-RFID system is of special interest in applications where the reading distance can be sacrificed in favor of data capacity (e.g., security and authentication). Encoding of corporate documents, ballots, exams, etc., by directly printing the proposed tags on the item product to prevent counterfeiting is envisaged.

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Capacitively-tuned split microstrip resonators for RFID barcodes

Cited by 124 publications

References 5 publications

Multiresonator-Based Chipless RFID System for Low-Cost Item Tracking

Multiresonator-Based Chipless RFID System for Low-Cost Item Tracking

A wireless low-range pressure sensor based on P(VDF-TrFE) piezoelectric resonance

High data density and capacity in chipless radiofrequency identification (chipless-RFID) tags based on double-chains of S-shaped split ring resonators (S-SRRs)

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