Title :
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
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;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2012 IEEE
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4673-0461-0
DOI :
10.1109/APS.2012.6349201
