TUTCRIS - Tampereen teknillinen yliopisto

TUTCRIS

Wireless Measurement of RFID IC Impedance

Tutkimustuotosvertaisarvioitu

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut3194-3206
JulkaisuIEEE Transactions on Instrumentation and Measurement
Vuosikerta60
Numero9
DOI - pysyväislinkit
TilaJulkaistu - 2011
OKM-julkaisutyyppiA1 Alkuperäisartikkeli

Tiivistelmä

Accurate knowledge of the input impedance of an RFID IC at its wake-up power is valuable as it enables the design of a performance-optimized tag for a specific IC. However, since the IC impedance is power-dependent, few methods exist to measure it without advanced equipment. We propose and demonstrate a wireless method, based on electromagnetic simulation and threshold power measurement, applicable to fully assembled RFID tags, to determine the mounted IC’s input impedance in the absorbing state including any parasitics arising from the packaging and the antenna-IC connection. The proposed method can be extended to measure the IC’s input impedance in the modulating state as well.

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