A miniaturized dual band RFID tag

Pachler, Walther; Grosinger, Jasmin; Bösch, Wolfgang; Holweg, Gerald; Steffan, Christoph

doi:10.1109/rfid-ta.2014.6934233

Cited by 9 publications

(4 citation statements)

References 10 publications

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“…6,7 The main functional components of a wireless sensor system include a power link module, a communication link, a controller, and one or multiple sensors. The typical implementation of such systems has been based on COTS, 6,7 while recent trends have moved towards a combination of integrated circuits (ICs) and discrete components and are finally evolving towards a complete monolithic integration [8][9][10][11][12][13][14][15] where the demand of footprint reduction is driven by upcoming applications. 16 Calpa et al 17 provides an interesting analysis of monolithic wireless powered systems by suggesting that the cost/mm 2 of finished silicon mass-produced in a 180-nm CMOS process, with the overhead of the spacing between individual chips, is about 9 cents, while the cost of a typical RFID tag is 20 cents.…”

Section: Discussionmentioning

confidence: 99%

“…Though for midrange, inductive or resonant magnetic coupling is preferred due to its high efficiency, inductive coupling-based techniques have demonstrated a power transfer in the range of few micro-Watts for a distance of few millimeter. 8,10,13,19 The inductive resonant coupling has been successfully employed for band-limited and high-efficiency power transfer either by employing series or parallel or mixed coupling model depending upon the load size and separation among the coupling coils. 20 A major factor determining system efficiency is the intercoil coupling coefficient, which depends on the distance between the coils, their geometry, self and mutual inductances, and the quality factor Q of the coils.…”

Section: Discussionmentioning

confidence: 99%

“…The microwaves power transfer, among the first technologies used for wireless transmission, provides an efficient power link for large distance applications. Though for midrange, inductive or resonant magnetic coupling is preferred due to its high efficiency, inductive coupling‐based techniques have demonstrated a power transfer in the range of few micro‐Watts for a distance of few millimeter . The inductive resonant coupling has been successfully employed for band‐limited and high‐efficiency power transfer either by employing series or parallel or mixed coupling model depending upon the load size and separation among the coupling coils .…”

Section: Introductionmentioning

confidence: 99%

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A wirelessly powered low‐power digital temperature sensor

Amin

Shahbaz

Jawed

et al. 2020

Circuit Theory & Apps

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Summary A wirelessly powered temperature sensor is presented in complementary metal‐oxide‐semiconductor (CMOS) 180‐nm process. The wireless power transfer (WPT) is performed using resonant magnetic coupling, and a diode‐less AC to DC conversion is achieved through a quadrature‐oscillator with native‐MOS. The quadrature‐signals are subsequently used to control the diode‐less rectifier switches. The on‐chip temperature sensor exploits the subthreshold region temperature, and the sensed temperature is converted to frequency using a ring‐oscillator, which is implemented using differential cross coupled oscillator‐based delay cells. The temperature sensor architecture also employs a temperature‐insensitive replica circuit to minimize process dependence and enhance power‐supply rejection ratio (PSRR) of the sensing process. The application‐specific integrated circuit has been designed and fabricated in 180‐nm CMOS process and has dimensions of 2 mm × 2 mm. The measurement results demonstrate that the WPT circuit generates a DC voltage of 1V with a power transfer efficiency of 85% for distances 2 to 8 mm with settling time of microseconds to milliseconds. The temperature sensor demonstrates a resolution of < ±0.6C with a sensitivity of 0.52 mV/C and 126.9 Hz/C along with PSRR of −63dB and Integral Non‐Linraity (INL) of 5% measured across six different dies. The back‐scattering communication demonstrates a −53‐dB signal at a distance of 4 mm without affecting the WPT efficiency. The total power consumption of the temperature sensor along with the integrated biases is 120 nW.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A wirelessly powered low‐power digital temperature sensor

Amin

Shahbaz

Jawed

et al. 2020

Circuit Theory & Apps

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“…The maximum reading ranges are 4.9 cm and 8.7 m for HF and UHF bands, respectively. Other dual-band RFID tag antennas were also presented by other researchers [14][15][16][17][18][19][20]. Most dual-band RFID tags are in the credit card size of 53.98 mm in width and 85.6 mm in length, which is quite a large and complicated structure.…”

Section: Introductionmentioning

confidence: 99%

A Novel Antenna Design of Compact HF and UHF Passive RFID Tags with Interconnected Structure for Energy Harvesting and Tracking Systems

Kawdungta,

Mhunkaew,

Torrungrueng

et al. 2024

International Journal of RF and Microwave Computer-Aided Engine

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We propose a new dual-band passive RFID tag antenna design by combining a rectangular spiral coil and patch-meander-line dipole with an interconnected structure. This design enables operation in high-frequency (HF) and ultra-high-frequency (UHF) RFID systems, suitable for energy harvesting and tracking applications. The simulations by the CST full-wave software demonstrate conjugate impedance matching between the tag antenna and two RFID tag chips. At 13.56 MHz (HF), the tag antenna exhibits an inductive reactance of 422.79 Ω, while at 922.5 MHz (UHF), it presents an impedance of 9.41+j174.96 Ω. The antenna generates a maximum magnetic field intensity of 0.5 A/m and omnidirectional electromagnetic fields with an antenna realized gain of -4.26 dBi at 922.5 MHz. We also analyze the impact of the tag antenna combination using numerical software. Furthermore, we fabricate a prototype tag antenna and validate its performance with RFID readers. The proposed tag antenna achieves the maximum read ranges of 11 cm and 6.9 m for the HF (13.56 MHz) and UHF (920-925 MHz) bands, respectively, accompanied by the energy harvesting of 1.48 volts at the HF band by the coupling magnetic field received by the HF antenna to the chip ST25DV04K at the output voltage pin.

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Effect of sintering atmospheres on printed silver nanoparticle patterns for flexible electronics application

Jang

Rahman

2021

Appl. Phys. A

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A miniaturized dual band RFID tag

Cited by 9 publications

References 10 publications

A wirelessly powered low‐power digital temperature sensor

A wirelessly powered low‐power digital temperature sensor

A Novel Antenna Design of Compact HF and UHF Passive RFID Tags with Interconnected Structure for Energy Harvesting and Tracking Systems

Effect of sintering atmospheres on printed silver nanoparticle patterns for flexible electronics application

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