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A Small RFID Tag Antenna to Identify Metallic Objects
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- Authors
- Won Kyu Choi, Jung Suk Kim, Ji-Hoon Bae, Gil Young Choi
- Issue Date
- 2008-07
- Citation
- International Symposium on Antennas and Propagation and USNC/URSI National Radio Science Meeting (APSURSI) 2008, pp.1-4
- Language
- English
- Type
- Conference Paper
- Abstract
- This letter presents the design of a small and low-profile RFID tag antenna in the UMF band that can be stuck to metallic objects. The designed tag antenna which uses a ceramic material as an antenna substrate consists of a radiating patch and microstrip lines for a proximity-coupled feeding structure, which is the structure that can easily obtain impedance matching between an antenna and a tag chip without any additional matching network. The fractional return-loss bandwidth for S11<10dB and radiation efficiency are about 1% and 40% at 911MHz, respectively. The read range is approximately from 3 to 4m when the tag antenna is mounted on a metallic surface. © 2008 IEEE.