Title :
Design and characterization of a miniaturized patch antenna for passive UHF RFID applications
Author :
Abdulhadi, Abdulhadi E. ; Tehran, Hamidreza Memarzadeh ; Abhari, Ramesh
Author_Institution :
Department of Electrical and Computer Engineering, McGill University, Montreal (QC), Canada
Abstract :
A low profile RFID (radio frequency identification) tag consisting of a compact microstrip patch antenna for operation at the ultra high frequency (UHF) RFID band, ranging from 860–960 MHz, is proposed. The patch is backed by a mushroom-type Electromagnetic Band Gap (EBG) structure in order to achieve an area reduction of 29.11% in comparison with a conventional patch design. The RFID chip is integrated on the patch via an inset feed line that is positioned in a way to deliver the conjugate impedance matching between the antenna and the chip. The frequency response of the assembled tag was obtained by measuring the reflected power in the ON and OFF states of the chip and subtracting them. The maximum reading range of the tag was found to be around 11 m in two test scenarios of free standing tag and tag attached on a metallic surface.
Keywords :
Antenna measurements; Antenna radiation patterns; Impedance; Metamaterials; Patch antennas; Periodic structures; Radiofrequency identification; Miniaturized patch antenna; RFID tag design; electromagnetic bandgap (EBG); measurement of assembled tags;
Conference_Titel :
Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International
Conference_Location :
Montreal, QC, Canada
Print_ISBN :
978-1-4673-1085-7
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2012.6259640
