Title :
Small UHF RFID Tag Antenna with Improved Bandwidth
Author :
Zhang, Hong-Lin ; Tian, Xue-Jun ; Hu, Bin-Jie
Author_Institution :
Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou
Abstract :
A minified UHF Tag antenna with two meander dipoles and a match network is proposed and simulated. The antenna is printed with thin copper on a polyimide substrate of 50 um thickness. The dimensions of the antenna are 65 mm in width and 48 mm in length. The simulation results show that the impedance bandwidth is 66 MHz and the radiation efficiency within the bandwidth is over 80%, and the antenna directivity is higher than 2 dBi in the band of interest. To verify the S- parameter given by the EM simulator, the impedance of the antenna is used to calculate the actual S-parameter directly. And the comparison shows that the simulating result is quite reliable. A method of measurement is also proposed in this article.
Keywords :
UHF antennas; dipole antennas; directive antennas; radiofrequency identification; EM simulator; S-parameter; UHF RFID tag antenna; UHF tag antenna; antenna directivity; impedance bandwidth; meander dipoles; radiation efficiency; Bandwidth; Circuit simulation; Dipole antennas; Impedance; Inductance; Microwave antennas; Polyimides; RFID tags; Radiofrequency identification; UHF antennas;
Conference_Titel :
Microwave Conference, 2007. APMC 2007. Asia-Pacific
Conference_Location :
Bangkok
Print_ISBN :
978-1-4244-0748-4
Electronic_ISBN :
978-1-4244-0749-1
DOI :
10.1109/APMC.2007.4554887
