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Novel omnidirectional polarized tag antenna for UHF RFID applications

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4 Author(s)
Wei-Chih Chen ; Institute of Photonics and Communications, National Kaohsiung University of Applied, Sciences, Kaohsiung 807, Taiwan ; Hua-Ming Chen ; Yi-Fang Lin ; Shu-An Yeh

An UHF RFID tag antenna which is comprised of a trapezoidal loop and a dual-dipole radiator with an L-slit for omnidirectional polarized reading patterns is designed, fabricated and measured. For a conjugate match to the Monza3 microchip impedance of 44 - j231 at 915 MHz, an orthogonal dual-dipole tag antenna (91 mm × 91 mm) with L-slit on each dipole arm was designed. The read range of the prototype attached on a different glass can reach more than 9 m, which has been tested for an RFID reader with 4.0 W of EIRP.

Published in:

2012 Asia Pacific Microwave Conference Proceedings

Date of Conference:

4-7 Dec. 2012