Title :
A compact HF/UHF dual band RFID tag antenna
Author :
Zi Long Ma ; Li Jun Jiang ; Jingtian Xi ; Ye, T.T.
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, Hong Kong, China
Abstract :
This paper presents a novel dual band RFID (radio frequency identification) tag antenna. Two challenges are faced: the compact dimension and the impaired bandwidth due to the couplings between two band structures. A spiral coil is designed to handle the HF (13.56MHz) near field coupling, and a diagonal symmetric design consisting of two meander lines are placed inside the coil for UHF band (915MHz). This structure supports multiple resonance modes around 915MHz to broaden the working bandwidth under the large inductive circumstance from the HF coil. The proposed antenna is easy to adjust by both coarse tuning and fine tuning. Its overall dimension is of a credit card size on a single layer thin substrate.
Keywords :
HF antennas; UHF antennas; multifrequency antennas; radiofrequency identification; spiral antennas; UHF RFID tag antenna; dual band RFID tag antenna; frequency 13.56 MHz; frequency 915 MHz; meander lines; radio frequency identification; spiral coil; Antenna measurements; Bandwidth; Coils; Dipole antennas; Impedance; Radiofrequency identification; UHF antennas;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2013 IEEE
Conference_Location :
Orlando, FL
Print_ISBN :
978-1-4673-5315-1
DOI :
10.1109/APS.2013.6711221
