Tunable Near-Field Focused Circular Phase-Array Antenna for 5.8-GHz RFID Applications

Author

Siragusa, Romain ; Lemaître-Auger, Pierre ; Tedjini, Smail

Author_Institution

Lab. de Conception et d´´Integration des Syst. (LCIS), Grenoble Inst. of Technol., Valence, France

Volume

10

fYear

2011

fDate

7/3/1905 12:00:00 AM

Firstpage

33

Lastpage

36

Abstract

An RFID-compatible focused circular phase-array antenna working at 5.8 GHz is proposed, which is theoretically analyzed and experimentally demonstrated. It consists of 24 half-wavelength dipole antennas placed on three circles. Using only two phase-shifters, a tunable focal spot in the range of 0.4-1 m (10λ) is obtained. The antenna system is analyzed using the Huygens-Fresnel theory, which is compared to the experimental results. At a focal distance of 0.9 m, the measured beam width and focal depth are given by 0.75λ and 5λ, respectively, which are in agreement with the calculated results.

Keywords

antenna phased arrays; dipole antenna arrays; microwave antenna arrays; microwave phase shifters; radiofrequency identification; Huygens-Fresnel theory; RFID applications; frequency 5.8 GHz; half-wavelength dipole antennas; phase shifters; radiofrequency identification; tunable focal spot; tunable near-field focused circular phase-array antenna; Antenna arrays; Antenna radiation patterns; Antenna theory; Arrays; Dipole antennas; Directive antennas; Field programmable analog arrays; Focused; near-field; phase array; radio frequency identification (RFID);

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2011.2108632

Filename

5701757