Using a circularly polarized patch antenna to optimize the passive UHF RFID indoor channel

Author

Cremer, Markus ; Pervez, Anjum ; Dettmar, Uwe ; Knie, Thomas ; Kronberger, Rainer

Author_Institution

Fac. of Eng., Sci. & the Built Environ., London South Bank Univ., London, UK

fYear

2013

fDate

7-13 July 2013

Firstpage

1730

Lastpage

1731

Abstract

In this paper we describe the design and performance of a new circularly polarized broadband patch antenna for RFID applications. It works both in the current European UHF range (865 MHz - 868 MHz) and the new European UHF range according to ETSI TS 102 902 (915 MHz - 921 MHz). Simulations show that circular patch antennas improve the multipath behavior of the channel significantly. In [2] we show that switching the system frequency strongly improves the channel´s fading characteristic. Because an RFID system can be equipped with the new antenna for readers and tags we can make use of both beneficial effects to increase tag read probabilities and read ranges in typical indoor environments. RSS measurements are used to verify the simulation results and to quantify the performance of the new antenna.

Keywords

UHF antennas; fading channels; indoor radio; microstrip antennas; polarisation; radiofrequency identification; ETSI TS 102 902; European UHF range; RFID applications; RFID system; RSS measurements; circular patch antennas; circularly polarized broadband patch antenna; fading characteristic; frequency 865 MHz to 868 MHz; frequency 915 MHz to 921 MHz; indoor environments; multipath behavior; passive UHF RFID indoor channel; system frequency; tag read probabilities; Antenna measurements; Dipole antennas; Fading; Passive RFID tags; Patch antennas; Standards;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium (APSURSI), 2013 IEEE

Conference_Location

Orlando, FL

ISSN

1522-3965

Print_ISBN

978-1-4673-5315-1

Type

conf

DOI

10.1109/APS.2013.6711524

Filename

6711524