Title :
Double-layer folded loop antenna for UHF near-field RFID applications
Author :
Li, Xiuping ; Sun, Zhongyuan ; Liu, Ying
Author_Institution :
Sch. of Electron. Eng., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
In this paper, a double-layer folded loop reader antenna is proposed for ultrahigh frequency (UHF) near-field radio frequency identification (RFID) applications. The current distribution along the top loop is kept in phase by folding the microstrip line down to the bottom layer. Thus, the proposed antenna generates strong and even magnetic field distribution in the near-field zone of the antenna. The antenna is printed on two sides of FR4 substrate, with the diameter of 94mm and the height of 20.2mm. The antenna achieves good impedance matching and uniform magnetic field distribution over the band of 858MHz~869MHz. In addition, the simulated reading distance is 90mm.
Keywords :
UHF antennas; impedance matching; loop antennas; magnetic fields; radiofrequency identification; UHF near-field RFID applications; current distribution; double-layer folded loop antenna; double-layer folded loop reader antenna; impedance matching; magnetic field distribution; microstrip line; ultrahigh frequency near-field radio frequency identification applications; Antenna measurements; Current distribution; Magnetic fields; Radiofrequency identification; UHF antennas;
Conference_Titel :
Antennas and Propagation (APCAP), 2012 IEEE Asia-Pacific Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4673-0666-9
DOI :
10.1109/APCAP.2012.6333158
