Title :
Planar metallic tag antenna for UHF RFID system
Author :
Jui-Han Lu ; Gao-Ting Zheng
Author_Institution :
Dept. of Electron. Commun. Eng., Nat. Kaohsiung Marine Univ., Kaohsiung, Taiwan
Abstract :
A novel broadband design of planar tag antenna mounted on the metallic objects for UHF RFID system is proposed. We derive a new resonant mode that is excited with frequency shifting to enhance the operating bandwidth for broadband operation by employing the shorting pins posted at the corner of the proposed tag antenna. The obtained impedance bandwidth across the operating band can reach about 112 MHz (12.5 %) for UHF band, which is from 850 to 962 MHz. Also, with unidirectional pattern, the measured reading distance is about 5.2 m as the proposed tag antenna mounted on the metallic object.
Keywords :
UHF antennas; antenna radiation patterns; broadband antennas; planar antennas; radiofrequency identification; UHF RFID system; broadband design; broadband operation; frequency 850 MHz to 962 MHz; frequency shifting; impedance bandwidth; metallic objects; planar metallic tag antenna; resonant mode; shorting pins; unidirectional pattern; Antenna measurements; Broadband antennas; Broadband communication; Dipole antennas; Impedance; Radiofrequency identification; UHF antennas; Broadband; RFID; Tag;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2012 Asia-Pacific
Conference_Location :
Kaohsiung
Print_ISBN :
978-1-4577-1330-9
Electronic_ISBN :
978-1-4577-1331-6
DOI :
10.1109/APMC.2012.6421809
