A 900-MHz RFID system with TAG-antenna magnetically-coupled to the die

Finocchiaro, Alessandro; Ferla, G.; Girlando, G.; Carrara, F.; Palmisano, G.

doi:10.1109/rfic.2008.4561436

Cited by 13 publications

(7 citation statements)

References 2 publications

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“…To study this effect, the structure of Table I has been compared with a transformer having the same secondary coil and a single-turn primary winding [3]. The single-turn primary winding is designed in such a way as to have the same average side length of that with three turns, i.e., m. The MAG of the two structures is reported in Fig.…”

Section: Appendix a Heterogeneous Transformer Design Criteriamentioning

confidence: 99%

“…To this purpose, the CMOS chip is magnetically coupled to the antenna realized on the flexible substrate, thus eliminating all the galvanic contacts between the chip and the antenna itself [3], [4]. The magnetic coupling is established, as in Fig.…”

mentioning

confidence: 99%

“…A first experiment of a tag antenna magnetically coupled to an RFID chip has been demonstrated in [3]. In [12], a UHF RFID tag has been realized on a standard 0.18-m CMOS, including an on-chip loop antenna.…”

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confidence: 99%

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A New Contactless Assembly Method for Paper Substrate Antennas and UHF RFID Chips

Alimenti

Virili

Orecchini

et al. 2011

IEEE Trans. Microwave Theory Techn.

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Abstract-This paper deals with a low-cost method for the assembly of flexible substrate antennas and UHF RF identification silicon (Si) chips. Such a method exploits a magnetic coupling mechanism, thus not requiring for galvanic contacts between the Si chip and antenna itself. The magnetic coupling is established by a planar transformer, the primary and secondary windings of which are implemented on flexible substrate and Si chip, respectively. As a result, the Si chip can be assembled on the antenna with a mere placing and gluing process. First, the idea has been validated by theory. Electromagnetic simulations of a square heterogeneous transformer (1.0-mm side) show a maximum available power gain (MAG) of 0.4 dB at 868 MHz. In addition, the heterogeneous transformer is also quite tolerant with respect to misalignment between primary and secondary. An offset error of 150 m reduces the MAG to 0.5 dB. A sub-optimal matching strategy, exploiting a simple on-chip capacitor, is then developed for antennas with 50-input impedances. Finally, the idea has been experimentally validated exploiting printed circuit board (PCB) prototypes. A PCB transformer (1.5-mm side) and a transformer rectifier (two-diode Dickson multiplier) have been fabricated and tested. Measurements indicates a MAG of 0.3 dB at 868 MHz for the transformer and the capability of the developed rectifier to supply a 220-k load at 1.5 V with a 2-dBm input power.

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Section: Appendix a Heterogeneous Transformer Design Criteriamentioning

confidence: 99%

mentioning

confidence: 99%

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A New Contactless Assembly Method for Paper Substrate Antennas and UHF RFID Chips

Alimenti

Virili

Orecchini

et al. 2011

IEEE Trans. Microwave Theory Techn.

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show abstract

“…To extend its operation to the radiating near-or far-field ranges with acceptable efficiencies, the WPR must be coupled to more efficient radiators, as it is commonly carried out for ultra-high-frequency (UHF) RFID tags. For instance, in [12][13][14], the reading range of an integrated UHF near-field RFID tag was extended with the use of a contactless inductively coupled antenna. The operating distance was augmented from a few millimetres to 4 cm.…”

Section: Introductionmentioning

confidence: 99%

Design and measurement of a contactless interface between a dipole antenna and a CMOS fully integrated wireless power receiver

Menezes

Silva

Cabrera

et al. 2018

IET Microwaves, Antennas & Propagation

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Here, the authors present a study on a contactless interface between a fully integrated wireless power receiver (WPR) and a dipole antenna. The authors analyse the impedance matching between the antenna and the inductive link formed by the contactless interface for providing an appropriate design methodology. Furthermore, the authors developed a measurement strategy to verify the entire system comprised by a pair of dipole antennas, the inductive link, and the CMOS WPR. The results show that the CMOS die is well coupled to the antenna, the complete system operates correctly with a source of 26.6 dBm at 987 MHz when the distance between the dipole antennas is 58 cm.

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“…Generally, these subsystems, antennas and circuits, are directly interconnected by means of galvanic contacts, thus requiring a wire-bonding or a soldering process. Recently a novel method to connect such subsystems has been proposed in [5][6][7][8][9][10]. This method is based on magnetic coupling and promises to enhance the integration level of wearable electronic systems.…”

Section: Introductionmentioning

confidence: 99%

Wearable Textile Antenna Magnetically Coupled to Flexible Active Electronic Circuits

Virili

Rogier

Alimenti

et al. 2014

Antennas Wirel. Propag. Lett.

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Abstract-This paper proposes wearable electronic modules on textile, suitable for garment integration, based on antennas magnetically coupled to the active circuitry. The coupling mechanism is based on a heterogeneous transformer with the primary and secondary windings implemented in the antenna and in the circuitry substrate (hybrid or monolithic), respectively. The proposed coupling topology avoids galvanic contacts between the antenna and the active circuitry, allowing for interconnecting the antenna by a mere placing and gluing process. Bonding and soldering processes, often critical for textile materials are thus avoided. The proposed innovation, mitigating the industrial realization constraints posed by textile implementation of active antennas and RFID tags, should unsurprisingly enable and foster industrial developments of garment RFID, wearable electronics and body-centric communications systems. A patch antenna with transformer based on textile materials and operating in the frequency band 2.4-2.4835 GHz is designed, realized and measured.

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A 900-MHz RFID system with TAG-antenna magnetically-coupled to the die

Cited by 13 publications

References 2 publications

A New Contactless Assembly Method for Paper Substrate Antennas and UHF RFID Chips

A New Contactless Assembly Method for Paper Substrate Antennas and UHF RFID Chips

Design and measurement of a contactless interface between a dipole antenna and a CMOS fully integrated wireless power receiver

Wearable Textile Antenna Magnetically Coupled to Flexible Active Electronic Circuits

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