Title :
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
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;
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
DOI :
10.1109/IMWS2.2011.6027212
