Broadband circularly polarized microstrip antenna for RFID reader applications

Author

Boo, Yan Shan ; Nasimuddin ; Chen, Z.N. ; Alphones, A.

Author_Institution

Sch. of EEE, Nanyang Technol. Univ., Singapore, Singapore

fYear

2009

fDate

7-10 Dec. 2009

Firstpage

625

Lastpage

628

Abstract

A broadband single-feed compact circularly polarized stacked microstrip antenna for radiofrequency identification (RFID) reader applications is proposed and investigated. The proposed antenna achieved a gain of more than 5.0 dBic, impedance bandwidth with VSWR less than 2 and a wide 3-dB axial-ratio (AR) bandwidth of more than 12% over ultra-high frequency (UHF) band (840 - 940 MHz). The overall antenna size is 0.48Â¿_o Ã— 0.48Â¿_o Ã— 0.0984Â¿_o at 900 MHz. The proposed antenna is attractive for RFID reader applications which require compact size and good circular polarization operation.

Keywords

UHF antennas; broadband antennas; microstrip antennas; radiofrequency identification; RFID reader; VSWR; broadband circularly polarized microstrip antenna; circular polarization operation; frequency 840 MHz to 940 MHz; impedance bandwidth; radiofrequency identification reader; single-feed compact stacked microstrip antenna; ultra-high frequency band; Antenna measurements; Bandwidth; Broadband antennas; Coaxial components; Frequency; Microstrip antennas; Polarization; Probes; Radiofrequency identification; UHF antennas; Circular polarization; RFID; UHF; microstrip antenna;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2009. APMC 2009. Asia Pacific

Conference_Location

Singapore

Print_ISBN

978-1-4244-2801-4

Electronic_ISBN

978-1-4244-2802-1

Type

conf

DOI

10.1109/APMC.2009.5384142

Filename

5384142