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Design of a compact CPW-fed UHF RFID tag antenna for metallic objects
- Authors
- Um, Youngman; Kim, Uisheon; Choi, Jaehoon
- Issue Date
- May-2008
- Publisher
- John Wiley & Sons Inc.
- Keywords
- RFID; tag antenna; metallic objects; CPW-fed
- Citation
- Microwave and Optical Technology Letters, v.50, no.5, pp 1439 - 1443
- Pages
- 5
- Indexed
- SCIE
SCOPUS
- Journal Title
- Microwave and Optical Technology Letters
- Volume
- 50
- Number
- 5
- Start Page
- 1439
- End Page
- 1443
- ISSN
- 0895-2477
1098-2760
- Abstract
- A compact CPW-fed UHF RFID tag antenna for metallic objects is proposed. It is less sensitive to the size of metallic objects and has a low profile and a long reading distance. The antenna consists of shorting walls, CPW feed line, a tag IC, and a radiating patch with I-shaped slits. The overall dimensions of the antenna are 55 mm x 26 mm x 2.2 mm. The tag IC has an input impedance of 43 - j800 Omega at 915 MHz. When the antenna is mounted on 200 nun x 200 mm, 400 mm x 400 mm, and 600 mm x 600 mm planar metallic plates, the maximum reading distances are 5.1, 5, and 4.5 m, respectively.
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