Design of spiral-shaped UHF near-field reader antenna for RFID applications

Author

Won-Seok Lee ; Kyoung-Sub Oh ; Jong-Won Yu

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol. (KAIST), Daejeon, South Korea

fYear

2011

fDate

24-25 Aug. 2011

Firstpage

1

Lastpage

2

Abstract

A type of ultra-high frequency (UHF, 840-960MHz) band near-field antenna for RFID applications is proposed. The proposed near-field reader antenna consists of two spiral-shaped transmission lines and lines are parallel to each other. By adjusting the distance between two lines of the reader antenna, the strength of the field between two transmission lines and the recognition distance are able to be controlled. The antenna printed on a FR4 printed circuit board (PCB) with an overall size of 150 × 150 × 1 mm. The proposed near-field reader antenna satisfactorily operates in UHF band, and the measurements show that the proposed antenna has bandwidth of about 350MHz and is capable of detecting UHF RFID tags in 11cm distance for 10 dBm incident power.

Keywords

UHF antennas; printed circuits; radiofrequency identification; FR4 printed circuit board; RFID applications; spiral-shaped UHF near-field reader antenna; Antenna measurements; Magnetic field measurement; Radiofrequency identification; Transmission line antennas; Transmission line measurements; UHF antennas; Near-field antennas; UHF antennas; radio frequency identification (RFID); spirals; transmission line antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Radio for Future Personal Terminals (IMWS-IRFPT), 2011 IEEE MTT-S International Microwave Workshop Series on

Conference_Location

Daejeon

Print_ISBN

978-1-4577-0961-6

Electronic_ISBN

978-1-4577-0963-0

Type

conf

DOI

10.1109/IMWS2.2011.6027212

Filename

6027212