Switched Beam Antenna Array for UHF Band RFID System

Author

Tseng, Jan-Dong ; Ko, Rong-Jie ; Wang, Wen-De

Author_Institution

Inst. of Inf. & Electr. Energy, Nat. Chin-Yi Univ. of Technol., Taichung

fYear

2007

fDate

16-18 April 2007

Firstpage

92

Lastpage

95

Abstract

A switched beam technique applied to UHF band RFID reader is proposed. The proposed switched beam circuit composed of power divider, phase shifter, and beam controlling logic circuit is implemented on a 1x2 array antenna, and resulted in a -30 to 30 degrees beam switching range in three discrete angles. This capability not only enhances the sensing range and distance but also reduces the possible EMI interference. In addition, this array antenna can help effectively cancel or attenuate mutual interference among tags through antenna arrays directivity. These advantages provided by the antenna array greatly improve the performance of a RFID system in terms of scan efficiency and read rate, which makes RFID applications even more appealing.

Keywords

UHF antennas; antenna arrays; radiofrequency identification; radiofrequency interference; EMI interference; UHF band RFID system; beam controlling logic circuit; phase shifter; power divider; scan efficiency; switched beam antenna array; Antenna arrays; Directional antennas; Interference; Logic circuits; Microwave antenna arrays; Phase shifters; Phased arrays; Power dividers; Radiofrequency identification; Switching circuits; RFID; UHF band; antenna array; switched beam;

fLanguage

English

Publisher

ieee

Conference_Titel

Anti-counterfeiting, Security, Identification, 2007 IEEE International Workshop on

Conference_Location

Xiamen, Fujian

Print_ISBN

1-4244-1035-5

Electronic_ISBN

1-4244-1035-5

Type

conf

DOI

10.1109/IWASID.2007.373703

Filename

4244789