Title :
A Circularly Polarized Aperture-Coupled Patch Antenna for RFID Reader
Author :
Yu, Donghai ; Ma, Yao ; Zhang, Zhiyun ; Sun, Renjie
Author_Institution :
State Key Lab. of Millimeter Waves, Southeast Univ., Nanjing
Abstract :
A novel aperture-coupled circularly polarized metallic patch antenna for UHF RFID reader is proposed. In the particular configuration studied, a square patch is placed above a common plane and is fed by means of an aperture-coupled feed network, which adopts sequential rotation technique. The aperture-coupled configuration and multilayer dielectric substrates have the advantage of miniaturizing the antenna´s size and enhancing the antenna bandwidth. By means of electromagnetic simulation, the impedance bandwidth and 3 dB axial-ratio bandwidth of the circularly polarized patch antenna presented achieve 58 MHz and more than 1%, respectively. Peak antenna gain across the overall operating band is designed to be 6 dB. Because of taking factors such as cost and weight into account by the selection of dielectric substrates, it´s very easy to get the low-cost and light-weight antenna.
Keywords :
aperture antennas; microstrip antennas; polarisation; radiofrequency identification; RFID reader; circularly polarized aperture-coupled patch antenna; metallic patch antenna; peak antenna gain; Aperture antennas; Bandwidth; Costs; Dielectric substrates; Electromagnetic wave polarization; Feeds; Impedance; Nonhomogeneous media; Patch antennas; Radiofrequency identification;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-4244-2107-7
Electronic_ISBN :
978-1-4244-2108-4
DOI :
10.1109/WiCom.2008.686
