A Novel Dual-band Circularly Polarized Antenna Using a Feeding Configuration for RFID Reader

Author

Dongmin Shin ; Piljun Park ; Wonmo Seong ; Jaehoon Choi

Author_Institution

Hanyang Univ., Seoul

fYear

2007

fDate

17-21 Sept. 2007

Firstpage

511

Lastpage

514

Abstract

A novel dual-band circularly polarized (CP) RFID reader antenna utilizing the feeding network with Wilkinson power divider is proposed. The antenna consists of two square radiating patches, an isolator for dual-band performance, a bottom ground plane, and microstrip feeding networks. The impedance bandwidth for 15 dB return loss is about 110 MHz in the UHF band and about 100 MHz in the ISM band. The antenna gain is about 5.3 ~ 7.3 dBic in the UHF band and about 6.7 ~ 7.6 dBic in the ISM band over the 3 dB axial ratio CP bandwidth.

Keywords

UHF antennas; antenna feeds; electromagnetic wave polarisation; multifrequency antennas; power dividers; radiofrequency identification; ISM band; RFID reader; UHF band; Wilkinson power divider; bandwidth 100 MHz; bandwidth 110 MHz; dual-band circularly polarized antenna; feeding configuration; impedance bandwidth; microstrip feeding networks; square radiating patches; Antenna feeds; Bandwidth; Dual band; Impedance; Isolators; Microstrip antennas; Polarization; Power dividers; Radiofrequency identification; UHF antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetics in Advanced Applications, 2007. ICEAA 2007. International Conference on

Conference_Location

Torino

Print_ISBN

978-1-4244-0767-5

Electronic_ISBN

978-1-4244-0767-5

Type

conf

DOI

10.1109/ICEAA.2007.4387349

Filename

4387349