Broadband Capacitively Coupled Patch Antenna for RFID Tag Mountable on Metallic Objects

Author

Chen, Horng-Dean ; Tsao, Yu-Hung

Author_Institution

Dept. of Optoelectron. & Commun. Eng., Nat. Kaohsiung Normal Univ., Kaohsiung, Taiwan

Volume

9

fYear

2010

fDate

7/2/1905 12:00:00 AM

Firstpage

489

Lastpage

492

Abstract

Design of a capacitively coupled meandered patch antenna is presented in this letter. The antenna is fabricated on a very thin substrate with thickness of 0.8 mm and designed for ultrahigh frequency (UHF) band radio frequency identification (RFID) tag mountable on metallic objects. The capacitively coupled feeding technique is used to perform a broadband operation. Bending a long patch into four half-wavelength radiating elements makes the surface currents of all radiating elements in phase, thus achieving an enhanced antenna gain and a good reading range performance. In addition, the proposed antenna mounted on a metallic platform is studied, and no severe degradation in the reading range is observed .

Keywords

broadband antennas; microstrip antennas; radiofrequency identification; RFID tag; broadband capacitively coupled patch antenna; half-wavelength radiating elements; metallic objects; size 0.8 mm; ultrahigh frequency band radio frequency identification tag; Patch antenna; radio frequency identification (RFID); tag antenna;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2010.2050854

Filename

5467223