DocumentCode
3750569
Title
Design of a broadband circularly polarized UHF RFID tag antenna for metallic objects
Author
Xin Qian;Guang-qiu Zhang;Xue Lei;Lei Hou;Sheng-hua Ma
Author_Institution
Department of Electromagnetic Field and Microwave, Zhengzhou Institute of Information Science and Technology, Zhengzhou 450001, China
Volume
2
fYear
2015
Firstpage
1
Lastpage
3
Abstract
A novel UHF RFID tag antenna with broadband and circularly polarized feature has been proposed for metallic object application. Double-point orthogonal coupling feed technology utilizes two microstrips with the differ of a quarter-wavelength and loading cross-slot on the quasi-square radiation patch. Finally the tag antenna achieves 38 MHz and 16.2 MHz for the 3dB impedance bandwidth (898MHz-936MHz), the 3dB axial ratio bandwidth (913.8MHz-930MHz) respectively. Obviously, the result has covered the upper band (920MHz-925MHz) of local China RFID technology standard and the proposed tag antenna can keep stable read-write performance when mounted on different size of metal surface.
Keywords
"Broadband antennas","Radiofrequency identification","Bandwidth","Microstrip antennas","Impedance","Reflector antennas"
Publisher
ieee
Conference_Titel
Microwave Conference (APMC), 2015 Asia-Pacific
Print_ISBN
978-1-4799-8765-8
Type
conf
DOI
10.1109/APMC.2015.7413054
Filename
7413054
Link To Document