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Planar inverted-E antenna for UHF RFID tag on metallic objects with bandwidth enhancement

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2 Author(s)
Lu, J.-H. ; Dept. of Electron. Commun. Eng., Nat. Kaohsiung Marine Univ., Kaohsiung, Taiwan ; Hung, K.-T.

A novel design of a planar compact inverted-E tag antenna mounted on metallic objects for UHF RFID systems is proposed. By insetting the slit into the upper horizontal strip of the proposed compact tag antenna, a new resonant mode close to the fundamental mode of the inverted-E antenna is excited to enhance the operating bandwidth. The obtained impedance bandwidth across the operating band can reach about 123 MHz (13.7 ) for the UHF band. Also, with directional pattern, the measured reading distance is about 2.5 m when the proposed compact tag antenna is mounted on the metallic object.

Published in:

Electronics Letters  (Volume:46 ,  Issue: 17 )