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

fYear

2012

fDate

Oct. 31 2012-Nov. 2 2012

Firstpage

618

Lastpage

621

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);

fLanguage

English

Publisher

ieee

Conference_Titel

Radar Conference (EuRAD), 2012 9th European

Conference_Location

Amsterdam

Print_ISBN

978-1-4673-2471-7

Type

conf

Filename

6450686