Title :
Loop antenna for UHF near-field RFID reader
Author :
Chen, Zhi Ning ; Goh, Chean Khan ; Qing, Xianming
Author_Institution :
Inst. for Infocomm Res., Singapore, Singapore
Abstract :
A loop antenna with phase shifters is proposed for ultra-high frequency (UHF) near-field radio frequency identification (RFID) readers. Using stub phase shifters, the solid-line loop antenna is capable of generating strong and uniform magnetic field in a near-field zone even though the perimeter of the loop is electrically large. Based on this design concept, a square loop antenna with a perimeter of two wavelengths at 915 MHz is prototyped and exhibits 100% reading rate with the reading range up to 24 mm.
Keywords :
UHF antennas; loop antennas; magnetic fields; phase shifters; radiofrequency identification; UHF near-field RFID reader; frequency 915 MHz; loop perimeter; magnetic field; near-field zone; reading rate; solid-line loop antenna; square loop antenna; stub phase shifter; ultra-high frequency near-field radio frequency identification reader; Current distribution; Directive antennas; Magnetic fields; Phase shifters; Poles and towers; Prototypes; Radio frequency; Radiofrequency identification; UHF antennas;
Conference_Titel :
Antennas and Propagation (EuCAP), 2010 Proceedings of the Fourth European Conference on
Conference_Location :
Barcelona
Print_ISBN :
978-1-4244-6431-9
Electronic_ISBN :
978-84-7653-472-4
