Title :
Design of circularly polarized loop tag antenna for UHF band RFID application
Author :
Ching-Han Tsai ; Horng-Dean Chen ; Hui-Wen Yang ; Ruenn-Bo Tsai
Author_Institution :
Dept. of Optoelectron. & Commun. Eng., Nat. Kaohsiung Normal Univ., Kaohsiung, Taiwan
Abstract :
A novel circularly polarized (CP) loop tag antenna for a UHF band (902-928 MHz) RFID tag is proposed. The structure of the proposed tag antenna is a square loop type loaded with an open gap, two feeding strips, and a matching stub. Besides achieving satisfactory 3-dB axial ratio bandwidth of 5.45% and 10-dB impedance bandwidths of approximately 5.5%, good antenna gain and reading range of more than 2.8 dBic and 16.3 m, respectively, were also demonstrated.
Keywords :
UHF antennas; antenna feeds; antenna radiation patterns; electromagnetic wave polarisation; loop antennas; radiofrequency identification; CP loop tag antenna structure; UHF band RFID tag application; antenna feeding strips; axial ratio bandwidth; circularly polarized loop tag antenna design; frequency 902 MHz to 928 MHz; impedance bandwidth; matching stub; open gap; radio frequency identification; square loop tag antenna; Antenna measurements; Antennas; Bandwidth; Frequency measurement; Impedance; Radiofrequency identification; Semiconductor device measurement; Loop antenna; circular polarization; radio frequency identification (RFID); tag antenna;
Conference_Titel :
Antennas and Propagation (ISAP), 2014 International Symposium on
Conference_Location :
Kaohsiung
DOI :
10.1109/ISANP.2014.7026742
