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.

transponder

mismatch

radio frequency identification (RFID)

De-embedding

ultrahigh-frequency (UHF).

differential

SG probe

EPC Gen2

Författare

Markus Frank

Chalmers, Mikroteknologi och nanovetenskap, Elektronikmaterial

Mattias Thorsell

Chalmers, Mikroteknologi och nanovetenskap, Mikrovågselektronik

Peter Enoksson

Chalmers, Mikroteknologi och nanovetenskap, Elektronikmaterial

Publicerad i

IEEE Transactions on Microwave Theory and Techniques

0018-9480 (ISSN) 15579670 (eISSN)

Vol. 64 Nummer/häfte 1 s. 299 - 309 art. nr 7350257

Kategorisering

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier (SSIF 2011)

Telekommunikation

Drivkrafter

Innovation och entreprenörskap

Identifikatorer

DOI

10.1109/TMTT.2015.2504438

Mer information

Senast uppdaterat

2022-04-05