Title :
A low profile circularly polarized antenna for UHF RFID readers
Author :
Alarcon, Juvenal ; Egels, Matthieu ; Pannier, Philippe
Author_Institution :
Inst. Mater. Microelectron. Nanosci. de Provence, Aix Marseille Univ., Marseille, France
Abstract :
This paper presents the design and prototyping of a low profile circularly polarized antenna for UHF RFID readers. This antenna has a very low profile, a low cost structure and is composed of two dipoles with 90° phase shift. In addition, to reduce the back beam radiation an artificial magnetic conductor surface (AMC) witch introduce a 0° of phase refection is used. The maximum gain is 1 dBi and the axial ratio around 3 dB in the UHF ETSI band. The overall size of the antenna is 157 mm × 157 mm × 3.2 mm.
Keywords :
UHF antennas; dipole antennas; polarisation; radiofrequency identification; AMC; UHF ETSI band; UHF RFID readers; artificial magnetic conductor surface; back beam radiation; low profile circularly polarized antenna; Dipole antennas; Gain; Radiofrequency identification; Reflection; Surface impedance; UHF antennas;
Conference_Titel :
RFID-Technologies and Applications (RFID-TA), 2011 IEEE International Conference on
Conference_Location :
Sitges
Print_ISBN :
978-1-4577-0028-6
DOI :
10.1109/RFID-TA.2011.6068680
