Title :
Flexible wideband UHF RFID tag antenna for curved metal surfaces
Author :
Son, Hae-Won ; Jeon, H.-G. ; Cho, Ji-Haeng
Author_Institution :
Div. of Electron. & Inf. Eng., Chonbuk Nat. Univ., Jeonju, South Korea
Abstract :
A low-cost, wideband, flexible antenna for radio frequency identification tags mountable on curved metal surfaces is presented. The antenna consists of a label-type patch adhering to a flexible polyvinyl chloride substrate. A novel balanced feed method using two orthogonal slits on the patch is proposed to perform simple and wideband impedance matching between the antenna and a tag chip. A prototype antenna was fabricated and tested with a commercial tag chip. It has a 3 dB return loss bandwidth of 70 MHz and a uniform read range of over 9.7 m in the 902 - 928 MHz range when it is mounted on a cylindrical metal plate with a radius of curvature of 150 mm.
Keywords :
UHF antennas; antenna feeds; broadband antennas; impedance matching; microstrip antennas; radiofrequency identification; bandwidth 70 MHz; curved metal surfaces; cylindrical metal plate; flexible wideband UHF RFID tag antenna; frequency 902 MHz to 928 MHz; label-type patch; loss 3 dB; low-cost wideband flexible antenna; orthogonal slits; radiofrequency identification tags; radius 150 nm; return loss; wideband impedance matching;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2012.1030
