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

fYear

2012

fDate

17-22 June 2012

Firstpage

1

Lastpage

3

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest (MTT), 2012 IEEE MTT-S International

Conference_Location

Montreal, QC, Canada

ISSN

0149-645X

Print_ISBN

978-1-4673-1085-7

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2012.6259640

Filename

6259640