Dual-band circularly polarized antenna for RFID reader applications

Author

Lin, Shin-Chiang ; Huang, Ting-Jui ; Hsu, Heng-Tung

Author_Institution

Dept. of Commun. Eng. & Commun. Res. Center, Yuan Ze Univ., Chungli, Taiwan

fYear

2012

fDate

8-14 July 2012

Firstpage

1

Lastpage

2

Abstract

This paper presents a novel design of dual-band and circularly-polarized antenna for RFID reader applications. Aperture-coupled ring radiators at 900 MHz and 2.4 GHz were adopted for dual-band operation. The coupling apertures were arranged orthogonally with proper phase offset to achieve circular polarization (CP) at both bands. The fabricated prototype exhibited good impedance bandwidth covering both UHF (902 MHz ~ 928 MHz) and microwave (2.4 GHz ~ 2.5 GHz) bands. Additionally, an axial ratio of less than 3 dB with better than 5 dBi gain was achieved at both bands.

Keywords

multifrequency antennas; polarisation; radiofrequency identification; RFID reader applications; UHF bands; aperture-coupled ring radiators; dual-band circularly polarized antenna; frequency 2.4 GHz to 2.5 GHz; frequency 900 MHz to 2.4 GHz; impedance bandwidth; microwave bands; phase offset; Antenna measurements; Apertures; Couplings; Dual band; Radiofrequency identification; UHF measurements;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium (APSURSI), 2012 IEEE

Conference_Location

Chicago, IL

ISSN

1522-3965

Print_ISBN

978-1-4673-0461-0

Type

conf

DOI

10.1109/APS.2012.6349201

Filename

6349201