Title :
Circular Loop Antenna for UHF RFID Tags with Inductively Coupled Structure
Author :
Wu, Jieying ; Li, Jianxiong ; Cui, Xusheng ; Mao, Luhong
Author_Institution :
Sch. of Inf. & Commun. Eng., Tianjin Polytech. Univ., Tianjin, China
Abstract :
In this paper, a passive RFID tag antenna in UHF band (860MHz-960MHz) using a meander split ring like a gear and an electricity small loop is proposed. Inductively coupled feed method is used to broaden the bandwidth. The proposed structure not only successfully reduces the tag size but also achieves impedance match between the antenna and the chip directly. Especially by varying their size, the antenna input impedance can be matched to arbitrary chip impedance. As a result, its resonant frequency at 915MH and perfect impedance matches is done. The results are satisfied with the design requirements of the UHF band.
Keywords :
UHF antennas; antenna feeds; loop antennas; radiofrequency identification; UHF RFID tags; UHF band; arbitrary chip impedance; bandwidth 860 MHz to 960 MHz; circular loop antenna; impedance match; inductively coupled feed; inductively coupled structure; meander split ring; passive RFID tag antenna; Broadband antennas; Dipole antennas; Impedance; Radiofrequency identification; Resistance; Resonant frequency;
Conference_Titel :
Control, Automation and Systems Engineering (CASE), 2011 International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4577-0859-6
DOI :
10.1109/ICCASE.2011.5997894
