Design and performance analysis of a planar antenna for near-field UHF-RFID desktop readers

Author

Michel, A. ; Buffi, Alice ; Caso, R. ; Nepa, Paolo ; Isola, G. ; Chou, H.T.

Author_Institution

Dept. Inf. Eng., Univ. of Pisa, Pisa, Italy

fYear

2012

fDate

4-7 Dec. 2012

Firstpage

1019

Lastpage

1021

Abstract

A near-field UHF (865-928MHz) RFID desktop reader antenna is designed by means of a traveling wave antenna. Since the detection of a tagged item in an arbitrary position and orientation is desirable, a meandered coplanar waveguide (CPW) line is properly designed, getting an homogeneous magnetic field amplitude. The main parameters of the RFID reader antenna (reflection coefficient, gain, effective isotropic field factor) are presented and discussed. Furthermore, the simulated and measured H-field distribution are compared, resulting in a good agreement. Finally, the overall RFID system performance is evaluated in terms of tag detection, considering short-range and long-range commercial RFID tags.

Keywords

UHF antennas; coplanar waveguides; electromagnetic wave reflection; magnetic fields; planar antennas; radiofrequency identification; CPW line; H-field distribution; coplanar waveguide; frequency 865 MHz to 928 MHz; isotropic field factor; long-range commercial RFID tags; magnetic field amplitude; near-field UHF-RFID desktop reader antenna; planar antenna; reflection coefficient; short-range commercial RFID tags; tag detection; traveling wave antenna; Antenna measurements; Coplanar waveguides; Magnetic field measurement; Magnetic fields; Radiofrequency identification; UHF antennas; UHF RFID; desktop reader; near-field coupling; near-field reader antenna;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings (APMC), 2012 Asia-Pacific

Conference_Location

Kaohsiung

Print_ISBN

978-1-4577-1330-9

Electronic_ISBN

978-1-4577-1331-6

Type

conf

DOI

10.1109/APMC.2012.6421811

Filename

6421811