Harmonic-WISP: A passive broadband harmonic RFID platform

Ma, Yunfei; Hui, Xiaonan; Kan, Edwin C.

doi:10.1109/mwsym.2016.7540224

Cited by 27 publications

(17 citation statements)

References 7 publications

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“…The tag remains a passive backscatterer, which can easily comply with current RF protocols. A schematic of the harmonic tag 24 is shown in Fig. 2a (for a photograph of the printed circuit board (PCB) prototype see Supplementary Fig.…”

Section: Nature Electronicsmentioning

confidence: 99%

“…The passive harmonic backscattering tag was prototyped by a custom PCB 24 as shown in the Supplementary Information, modified from the Wireless Identification and Sensing Platform (WISP) 34 . The harmonic generator on the tag was designed with a nonlinear transmission line (NLTL) 21 , which consists of a ladder structure of inductors and varactors.…”

Section: Nature Electronicsmentioning

confidence: 99%

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Monitoring vital signs over multiplexed radio by near-field coherent sensing

2017

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Section: Nature Electronicsmentioning

confidence: 99%

Section: Nature Electronicsmentioning

confidence: 99%

Monitoring vital signs over multiplexed radio by near-field coherent sensing

2017

Self Cite

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“…A humidity sensor based on a modulated tag has been presented by the authors of [ 38 ] with a read range of 7 m in free space. In the literature [ 44 ], modulated harmonic tags have been proposed for sensing applications where a read range of 4.5 m in free space is obtained using a non-linear transmission line as a frequency doubler. The main advantage of using the modulated harmonic tag compared with harmonic tags without modulation is the simplification in the receiver design as the modulated tag response at the second harmonic can be easily separated from the coupling at the second harmonic generated by the reader.…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, the modulated harmonic tags and chip-based RFID have the common drawback that the electronics used to modulate the harmonic components require a DC power source. In both cases, the tags [ 38 , 44 ] are powered based on an energy harvesting module, which converts the interrogation signal at UHF band to DC.…”

Section: Introductionmentioning

confidence: 99%

Passive Harmonic RFID System for Buried Assets Localization

Abdelnour

Lázaro

Villarino

et al. 2018

Sensors

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A passive harmonic tag for buried assets localization is presented for utility localization. The tag design is based on a dual-polarized patch antenna at Ultra High Frequency (UHF) band. One of its feeders is connected to a frequency doubler based on a Schottky diode that generates the second harmonic, which is transmitted using a linear-polarized patch tuned at this frequency. The power received at the other feeder of the dual-polarized antenna is harvested by an RF to DC converter based on a five-stage voltage multiplier whose energy is used to bias a low-power quartz oscillator that modulates the output of the doubler. The different parts of the system are presented, and the theoretical read range is estimated as a function of the soil composition and the water content. A low-cost reader based on a software defined radio is also presented. Finally, experiments with a prototype of the tag are performed for different soil conditions.

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“…In [5], a 23 m read-range Class-3 RFID system is realised by commercial UHF RFID reader with high cost and complex front-end with BAP tag. Different from carrier isolation and carrier cancellation technologies, harmonic technology [8][9][10][11] can solve the carrier leakage issue by using the second harmonics generated from non-linear components in tags for uplink. This technology has been used for inductive wireless power transfer system [10] and second harmonic-wireless identification and sensing platform RFID tag [11] for reduce reader to reader interference.…”

mentioning

confidence: 99%

Long read range Class‐3 UHF RFID system based on harmonic backscattering

Chen

Zhang

et al. 2018

Electron. lett.

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A high sensitivity Class-3 ultra high-frequency (UHF) radio-frequency identification (RFID) system based on harmonic backscattering to achieve a long read-range is presented. Harmonic backscattering is a promising solution to solve the carrier leakage issue of UHF RFID reader to improve the sensitivity. In the proposed RFID system based on harmonic backscattering, the RFID reader transmits data with the fundamental frequency carrier and receives data with its second harmonic carrier, and the RFID tag employs a rectifier to generate both DC power and the second harmonic carrier for backscattering without impedance mismatch. The first harmonic Class-3 UHF RFID system based on National Instruments software defined radio platform is proposed and implemented. The proposed semi-passive harmonic RFID tag has −20 dBm sensitivity. Test results show that the harmonic RFID system has a −101 dBm sensitivity with the harmonic RFID tag whose signal-to-blocker ratio is −7 dB at 20 m communication distance.

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Harmonic-WISP: A passive broadband harmonic RFID platform

Cited by 27 publications

References 7 publications

Monitoring vital signs over multiplexed radio by near-field coherent sensing

Monitoring vital signs over multiplexed radio by near-field coherent sensing

Passive Harmonic RFID System for Buried Assets Localization

Long read range Class‐3 UHF RFID system based on harmonic backscattering

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