Open AccessShorted Microstrip Patch Antenna Using Inductively Coupled Feed for UHF RFID Tag
Author(s) -
Kim JeongSeok,
Choi Wonkyu,
Choi GilYoung,
Pyo CheolSig,
Chae JongSuk
Publication year - 2008
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.08.0208.0074
Subject(s) - ultra high frequency , materials science , antenna (radio) , patch antenna , microstrip antenna , electrical impedance , acoustics , loop antenna , microstrip , input impedance , chip , electrical engineering , optoelectronics , antenna factor , engineering , physics
A very small patch‐type RFID tag antenna (UHF band) using ceramic material mountable on metallic surfaces is presented. The size of the proposed tag is 25 mm×25 mm×3 mm. The impedance of the antenna can be easily matched to the tag chip impedance by adjusting the size of the shorting plate of the patch and the size of the feeding loop. The measured maximum reading distance of the tag at 910 MHz was 5 m when it was mounted on a 400 mm × 400 mm metallic surface. The proposed design is verified by simulation and measurements which show good agreement.