Circularly polarized equilateral triangle patch antenna for UHF RFID reader applications

Author

Sim, Chow-Yen-Desmond ; Yi-Wen Hsu

Author_Institution

Dept. of Electr. Eng., Feng Chia Univ., Taichung, Taiwan

fYear

2013

fDate

11-12 Nov. 2013

Firstpage

397

Lastpage

399

Abstract

A simple circularly polarized (CP) equilateral triangular patch antenna for UHF (902-928 MHz) radio identification (RFID) reader applications is proposed. In this design, good CP radiation is achieved by loading a near semi-circular notch is into the patch. Furthermore, the L-shaped probe-feed method is used for achieving good impedance matching that results in broad impedance and CP bandwidth. The experimental results show that the 3-dB AR (axial ratio) bandwidth is approximately 3% (902-929 MHz), while the 10-dB impedance bandwidth is approximately 25.4% (854-1102 MHz).

Keywords

UHF antennas; antenna feeds; impedance matching; microstrip antennas; radiofrequency identification; L-shaped probe feed method; UHF RFID reader applications; broad impedance antenna; circularly polarized antenna; equilateral triangle patch antenna; frequency 902 MHz to 928 MHz; impedance matching; radio identification reader applications; semicircular notch; Antenna measurements; Bandwidth; Frequency measurement; Loss measurement; Microstrip antennas; Radiofrequency identification; RFID; circularly polarized; patch antenna; reader antenna;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Conference (LAPC), 2013 Loughborough

Conference_Location

Loughborough

Type

conf

DOI

10.1109/LAPC.2013.6711928

Filename

6711928