Delta RCS of UHF RFID taking into account the shunt resistance in the tag model

Author

Colin, E. ; Moretto, A. ; Ripoll, C. ; Chakra, S. Abou

Author_Institution

ESIGETEL, Avon, France

fYear

2009

fDate

June 28 2009-July 1 2009

Firstpage

1

Lastpage

4

Abstract

This paper deals with UHF RFID tag modeling. Recent electrical models present theory and measurements of backscattering by load modulation in RFID systems. These models fit with measurements in far field conditions. Load modulation and loading effect are based on the same physical phenomenon: the antenna current is modified by the load impedance. In far field, we can assume that the load modulation is made by switching between two impedances which are frequency dependent. These models neglect the shunt resistance which can deeply affect the load impedance and may produce failures in the communication system.

Keywords

electric impedance; radar antennas; radar cross-sections; radiofrequency identification; Delta RCS; UHF RFID; antenna current; electrical models; far field conditions; load impedance; load modulation; loading effect; radar cross section; shunt resistance; tag model; Antenna measurements; Backscatter; Electric resistance; Electric variables measurement; Electrical resistance measurement; Impedance; Loaded antennas; RFID tags; Radiofrequency identification; UHF measurements; Radar Cross Section; UHF tag model; loading effect; shunt resistance;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems and TAISA Conference, 2009. NEWCAS-TAISA '09. Joint IEEE North-East Workshop on

Conference_Location

Toulouse

Print_ISBN

978-1-4244-4573-8

Electronic_ISBN

978-1-4244-4574-5

Type

conf

DOI

10.1109/NEWCAS.2009.5290435

Filename

5290435