Chipless RFID Tag Exploiting Multifrequency Delta-Phase Quantization Encoding

Genovesi, Simone; Costa, Filippo; Monorchio, Agostino; Manara, Giuliano

doi:10.1109/lawp.2015.2471101

Cited by 65 publications

(27 citation statements)

References 14 publications

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“…This task obviously presents different challenges that have been faced in the last years by original approaches to the exploitation of different EM signature strategies for encoding the information. For example, the ID has been stored in the frequency response of the tag [16,17], as well as in the timing of the response [18,19],and also by exploiting the phase [20,21] or the polarization [22,23] of the scattered field. Moreover, a suitably designed chipless RFID can be also employed as a sensor for monitoring quantities, such as humidity [24][25][26], temperature [27], and gas [28], even in harsh environments [29].…”

Section: Introductionmentioning

confidence: 99%

Chipless Radio Frequency Identification (RFID) Sensor for Angular Rotation Monitoring

Genovesi

Costa

Borgese³

et al. 2018

Technologies

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A novel, chipless, Radio Frequency Identification (RFID) sensor is proposed for monitoring angular rotation. The rotation state is recovered by collecting the cross polar response of a tag, based on a periodic surface composed of a set of dipoles. The encoding mechanism allows the sensor to be very robust, even if it is applied on metallic objects, or in an environment with strong multipath. The proposed sensor does not require a large operational bandwidth. Instead, only a small set of reading frequencies are required. The number of reading frequencies required is dependent on the number of the employed dipoles. It is demonstrated that the rotation state of an object can be monitored within a span of 180 degrees, with up to a three-degree resolution, by employing a chipless RFID sensor comprising of four dipoles. The far field reading scheme and the absence of any electronics device allow the sensor to be employed in harsh environments.

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Section: Introductionmentioning

confidence: 99%

Chipless Radio Frequency Identification (RFID) Sensor for Angular Rotation Monitoring

Genovesi

Costa

Borgese³

et al. 2018

Technologies

Self Cite

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“…Strategies to enhance the number of bits without an increase in the number of resonators (and hence bandwidth and size) include multi-state multi-resonator tags [34]- [36] and hybrid tags [27], [30]- [33]. The former exploits the fact that more than two states can be achieved by a single resonant element.…”

Section: Introductionmentioning

confidence: 99%

Near-Field Chipless-RFID System With High Data Capacity for Security and Authentication Applications

Herrojo

Mata-Contreras

Núñez

et al. 2017

IEEE Trans. Microwave Theory Techn.

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Abstract-A high data capacity chipless radiofrequency identification (chipless-RFID) system, useful for security and authentication applications, is presented in this paper. Reading is based on near-field coupling between the tag, a chain of identical split ring resonators (SRRs) printed on a (typically flexible) dielectric substrate (e.g., liquid crystal polymer, plastic, paper, etc.), and the reader. Encoding is achieved by the presence or absence of SRRs at predefined (equidistant) positions in the chain, and tag identification is based on sequential bit reading. Namely, the tag must be longitudinally displaced, at short distance, over the reader, a microstrip line loaded with a SRR and fed by a harmonic signal. By this means, the harmonic signal is amplitude modulated, and the identification (ID) code is contained in the envelope function, which can be obtained by means of an envelope detector. With this system, tag reading requires proximity with the reader, but this is not an issue in many applications within the domain of security and authentication (e.g., secure paper for corporate documents, certificates, etc.). Several circularly-shaped 40-bit encoders (implemented in a commercial microwave substrate), and the corresponding reader, are designed and fabricated as proof-of-concept demonstrators. Strategies for programming the tags and a first proof-of-concept chipless-RFID tag fabricated on plastic substrate through inkjet printing are included in the paper.

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“…However, by this means, the number of bits achievable is still far from those of chipped RFID tags. Hybrid tags [52][53][54][55][56] are multi-domain tags where more than one domain (e.g. time, frequency, phase, polarization, etc.)…”

Section: Introduction Ransmission Lines Loaded With Electrically Smentioning

confidence: 99%

Microwave Encoders for Chipless RFID and Angular Velocity Sensors Based on S-Shaped Split Ring Resonators

et al. 2017

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In this paper, it is demonstrated that a chain of Sshaped split ring resonators (S-SRRs) etched on a dielectric substrate can modulate the amplitude of a carrier signal injected to a transmission line (a coplanar waveguide-CPW). To this end, the S-SRR chain must be transversally displaced above the CPW, in close proximity to it. By this means, the transmission coefficient of the line is modulated by the time-varying electromagnetic (inductive) coupling between the line and the S-SRRs of the chain, related to their relative motion. Based on this principle, two different applications can be envisaged: (i) angular velocity sensors, and (ii) near-field chipless radiofrequency identification (chipless-RFID) tags. In the former application, the S-SRR chain is circularly shaped and the S-SRRs are distributed uniformly along the perimeter of the rotor, at equidistant positions. By this means, the amplitude modulated signal generated by rotor motion exhibits envelope peaks whose distance is related to the angular velocity of the rotor. In the use of S-SRRs as microwave encoders for chipless RFID tags, not all the S-SRRs of the chain are present. Their presence or absence at the predefined (equidistant) positions is related to the logic state '1' or '0'. Tag reading is sequential and it is achieved through tag motion (at constant velocity) above the reader, a CPW transmission line fed by a carrier signal. The identification (ID) code is contained in the envelope function of the resulting amplitude modulated signal, which can be obtained by means of an envelope detector. With the proposed approach, a high number of pulses in angular velocity sensors can be achieved (with direct impact on angle resolution and sensitivity to changes in instantaneous rotation speed). Moreover, chipless-RFID tags with unprecedented number of bits can be obtained. The proposed angular velocity sensors can be useful in space environments, whereas the chipless-RFID systems based on the proposed tags are useful in applications where reading range can be sacrificed in favor of high data capacity (large number of bits), e.g., security and authentication.

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Chipless RFID Tag Exploiting Multifrequency Delta-Phase Quantization Encoding

Cited by 65 publications

References 14 publications

Chipless Radio Frequency Identification (RFID) Sensor for Angular Rotation Monitoring

Chipless Radio Frequency Identification (RFID) Sensor for Angular Rotation Monitoring

Near-Field Chipless-RFID System With High Data Capacity for Security and Authentication Applications

Microwave Encoders for Chipless RFID and Angular Velocity Sensors Based on S-Shaped Split Ring Resonators

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