Shifted Source Impedance and Nonlinearity Impact on RFID Transponder Communication for Drive-Level Offsets
Artikel i vetenskaplig tidskrift, 2016

A measurement and analysis method to quantify the communication quality for ultrahigh-frequency radio frequency identification (RFID) transponder chips under a shifting source environment is presented. A detailed description of theory, setup, and procedure is provided. The differences in on/off impedance (|ΔΓ|-value) of the transponder chip are critical for backscatter modulation and, therefore, the overall communication and transponder response. In the present work, a new quantity which includes the difference in on/off impedance, as well as arbitrary source impedance, is defined as an overall figure of merit. A qualitative analysis, considered as novel in the RFID community, shows the impact a source impedance shift has on the communication quality. The bare chip measurement setup enables an ASK modulated wake up signal, realized as a pulse train. The chip response consisting of modulated impedance states are measured in a pulse profile setup. Results show that different degrees of non-linearity in a transponder chip, depending on vendor and type, will have impact on the communication performance.

EPC Gen2

ultrahigh-frequency (UHF).

SG probe

mismatch

radio frequency identification (RFID)

differential

De-embedding

transponder

Författare

Markus Frank

Elektronikmaterial och system

Mattias Thorsell

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Peter Enoksson

Elektronikmaterial och system

IEEE Transactions on Microwave Theory and Techniques

0018-9480 (ISSN)

Vol. 64 299 - 309

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Telekommunikation

Drivkrafter

Innovation och entreprenörskap

DOI

10.1109/TMTT.2015.2504438