Title :
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
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;
Conference_Titel :
Antennas and Propagation Conference (LAPC), 2013 Loughborough
Conference_Location :
Loughborough
DOI :
10.1109/LAPC.2013.6711928
