Title :
Circularly polarized patch antenna using UC-PBG structure for RFID readers
Author :
Pflaum, S. ; Le Thuc, Philippe ; Kossiavas, G. ; Staraj, Robert
Author_Institution :
LEAT, Univ. de Nice-Sophia-Antipolis, Sophia-Antipolis, France
Abstract :
A circularly polarized patch antenna using an Uniplanar Compact Photonic Band Gap (UC-PBG) structure for RFID readers is presented. UC-PBG structure is successfully used to reduce surface-waves in order to improve the directivity of the microstrip patch antenna. This antenna is fabricated on a 1.2λ × 1.2λ × 0.012λ FR-4 substrate (permittivity of 4.4 and tan δ=0.02) for the European UHF RFID band going from 0.865 to 0.868 GHz. The -10dB impedance matching bandwidth of the antenna is 10.5% while the -3dB beamwidth is around 53° at 0.866 GHz in the x-z plane. Both experimental and theorical results of the antenna are presented and discussed.
Keywords :
UHF antennas; directive antennas; electromagnetic wave polarisation; impedance matching; microstrip antennas; photonic band gap; radiofrequency identification; European UHF RFID band; RFID readers; UC-PBG structure; circularly-polarized patch antenna; frequency 0.865 GHz to 0.868 GHz; impedance matching bandwidth; microstrip patch antenna directivity; surface wave reduction; uniplanar compact photonic band gap structure; Antenna measurements; Antennas; Europe; Periodic structures; Q measurement; EBG (Electromagnetic Band-Gap); High directivity; Radio Frequency IDentification (RFID); Uniplanar Compact Photonic Band Gap (UC-PBG); circular polarization (CP);
Conference_Titel :
Antennas and Propagation (EuCAP), 2013 7th European Conference on
Conference_Location :
Gothenburg
Print_ISBN :
978-1-4673-2187-7
Electronic_ISBN :
978-88-907018-1-8
