Title :
Wideband Omnidirectional Circularly Polarized Antenna Based on Tilted Dipoles
Author :
Yi Fan ; XuLin Quan ; Yan Pan ; YueHui Cui ; RongLin Li
Author_Institution :
Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China
Abstract :
A wideband omnidirectional circularly polarized (CP) antenna is developed. The omnidirectional CP antenna includes four tilted dipoles that are wrapped around a cylinder for omnidirectional CP pattern. Each tilted dipole is coupled with a parasitic element for bandwidth enhancement. It is shown that the wideband omnidirectional CP antenna achieves an axial ratio (AR) bandwidth of 44% (1.69-2.64 GHz) for AR <; 3 dB and an impedance bandwidth of 61% (1.35-2.54 GHz) for return loss >10 dB. The antenna gain is around 1 dBi with an omnidirectionality of less than 1.5 dB.
Keywords :
UHF antennas; antenna radiation patterns; broadband antennas; dipole antennas; omnidirectional antennas; CP antenna; axial ratio bandwidth; bandwidth enhancement; frequency 1.35 GHz to 2.64 GHz; omnidirectional CP pattern; parasitic element; tilted dipoles; wideband omnidirectional circularly polarized antenna; Antenna measurements; Broadband antennas; Dipole antennas; Impedance; Wideband; Circularly polarized (CP) antenna; Omnidirectional antenna; circularly polarized antenna; omnidirectional antenna; tilted dipole; wideband antenna;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2015.2490663
