Switched Microstrip Array Antenna for RFID System

Author

Kim, D.J. ; Kim, S.H. ; Kim, Y.K. ; Lim, H. ; Jang, J.H.

Author_Institution

Dept. of Inf. & Commun., Gwangju Inst. of Sci. & Technol., Gwangju

fYear

2008

fDate

27-31 Oct. 2008

Firstpage

1254

Lastpage

1257

Abstract

Switched array antenna with six microstrip patch elements was designed and characterized for UHF RFID application. A hexagonal-shaped RF switching circuit board was developed to select one of the array elements to read RFID tags surrounding the RFID reader antenna. The designed switching network ports have exhibited isolation greater than 30 dB and insertion loss less than 2.4 dB. The polarization direction of the microstrip patch elements is arranged perpendicular to RF switching circuit board. The measured characteristics of each antenna element at 915 MHz include gain of 9.06 and 8.62 dBi, half power beam width of 60deg and 70deg at E-plane and H-plane, respectively. Total switched array antenna can scan 360deg with 60deg incremental angle.

Keywords

UHF antennas; microstrip antenna arrays; polarisation; radiofrequency identification; RF switching circuit board; RFID reader antenna; UHF antennas; frequency 915 MHz; polarization direction; radiofrequency identification; switched microstrip array antenna; Antenna arrays; Insertion loss; Microstrip antenna arrays; Microstrip antennas; Microwave antenna arrays; RFID tags; Radio frequency; Radiofrequency identification; Switching circuits; UHF antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2008. EuMC 2008. 38th European

Conference_Location

Amsterdam

Print_ISBN

978-2-87487-006-4

Type

conf

DOI

10.1109/EUMC.2008.4751689

Filename

4751689