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Design of electrically small, folded monopole antenna using C-shaped meander for active 433.92 MHz RFID tag in metallic container application

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3 Author(s)
Ryu, H.K. ; Hawaii Center for Adv. Commun., Coll. of Eng., Univ. of Hawaii at Manoa, Honolulu, HI ; Lim, S. ; Woo, J.M.

A miniaturised RFID tag antenna for an active 433.92 MHz RFID system was designed, fabricated and measured. To attain a low profile, a folded monopole was bent and matched with a stub like an inverted-F antenna. Then the horizontal radiating segment was miniaturised with a C-shaped meander. The height of the antenna from the ground plane was 20 mm (0.029 ) and the antenna can be enclosed in a circle with a diameter of 34 mm (0.049 ). The measured 10 dB fractional bandwidth was 3.52 MHz (0.81 ) and the measured gain showed a conical radiation pattern with a maximum gain of 1.33 dBd.

Published in:

Electronics Letters  (Volume:44 ,  Issue: 25 )