Title :
Planar square quadrifilar spiral antenna for mobile RFID reader
Author :
Soo-Ji Lee ; Dong-Jin Lee ; Hyeong-Seok Jang ; Hyun-Sung Tae ; Jong-Won Yu
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol. (KAIST), Daejeon, South Korea
fDate :
Oct. 31 2012-Nov. 2 2012
Abstract :
A compact planar square quadrifilar spiral antenna (QSA) for passive UHF radio frequency identification (RFID) reader is proposed and experimentally investigated. The presented RFID reader antenna consists of four spiral antennas which are fed by microstrip feed network and the 4-port antenna matching technique for QSA is used to improve radiation efficiency. Experimental results shows the proposed antenna has peak gain of 0.06 dBic, axial ratio under 3 dB in wanted frequency band, 3-dB beamwidth of 124° with good right hand circular polarization (RHCP) characteristics.
Keywords :
UHF antennas; antenna feeds; microstrip lines; mobile antennas; planar antennas; polarisation; radiofrequency identification; spiral antennas; 4-port antenna matching technique; axial ratio; microstrip feed network; mobile RFID reader; passive UHF radiofrequency identification reader; planar square quadrifilar spiral antenna; radiation efficiency; right hand circular polarization; Antenna feeds; Helical antennas; Microstrip antennas; Ports (Computers); Radiofrequency identification; Spirals; UHF antennas; Quadrifilar spiral antenna; UHF RFID reader antenna; right hand circular polarization(RHCP);
Conference_Titel :
Radar Conference (EuRAD), 2012 9th European
Conference_Location :
Amsterdam
Print_ISBN :
978-1-4673-2471-7
