Title :
UHF RFID Reader Antenna With a Wide Beamwidth and High Return Loss
Author :
Son, Hae-Won ; Park, Hyuk ; Lee, Kyong-Hee ; Jin, Gwang-Ja ; Oh, Moon-Kyun
Author_Institution :
Div. of Electron. & Inf. Eng., Chonbuk Nat. Univ., Jeonju, South Korea
Abstract :
A compact circularly polarized antenna with a wide beamwidth and high return loss (RL) is presented. The antenna consists of four U-shaped metal strips sequentially rotated and fed with a 90 ° phase difference feed network located beneath the ground plane. The antenna is designed to operate at around 915 MHz for UHF radio frequency identification applications, and the experimental results show that it has a wide beamwidth of over 114 ° and high RL of over 34 dB in the 902-928 MHz range.
Keywords :
UHF antennas; antenna feeds; electromagnetic wave polarisation; radiofrequency identification; RL; U-shaped metal strip; UHF RFID reader antenna; UHF radiofrequency identification application; antenna feed network; compact circularly polarized antenna; frequency 902 MHz to 928 MHz; ground plane location; return loss; Antenna measurements; Antenna radiation patterns; Feeds; Metals; Probes; Radiofrequency identification; Circular polarization; high return loss; radio frequency identification (RFID); wide beamwidth;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2012.2207349
