TUTCRIS - Tampereen teknillinen yliopisto


An enhanced-range RFID tag using an ambient energy powered reflection amplifier



Otsikko2014 IEEE MTT-S International Microwave Symposium, IMS 2014
KustantajaInstitute of Electrical and Electronics Engineers Inc.
ISBN (painettu)9781479938698
DOI - pysyväislinkit
TilaJulkaistu - 2014
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
Tapahtuma2014 IEEE MTT-S International Microwave Symposium, IMS 2014 - Tampa, FL, Yhdysvallat
Kesto: 1 kesäkuuta 20146 kesäkuuta 2014


Conference2014 IEEE MTT-S International Microwave Symposium, IMS 2014
KaupunkiTampa, FL


A great challenge in UHF RFID systems consists of increasing their operating range. In this work, a circuit topology consisting of a reflection amplifier and a passive coupler is proposed to both amplify the input signal to the tag as well as the backscattered signal towards the reader. System analysis is provided to estimate the performance requirements of the proposed circuit. The amplifier is optimized in order to maximize its gain while minimizing its dissipated power, thus allowing for low-power operation by using ambient energy harvesting devices such as solar cells. The circuit is compatible with commercial UHF RFID tags and is implemented using low-cost inkjet printing fabrication. Prototypes of the various circuit components are fabricated and evaluated demonstrating the feasibility of the proposed system. Interesting results are showcased for tag efficiency improvement through such non-conventional front-end designs.