Title :
Elliptical helical antenna with parasitic wire for CP band enhancement
Author :
Wu, Ze-hai ; Che, Wen-Quan ; Fu, Bin ; Lau, Pui-Yi ; Yung, Edward K N
Author_Institution :
City Univ. of Hong Kong, Hongkong
Abstract :
In this paper, elliptical helical antenna with parasitic element is proposed to radiate the circularly polarized waves. By winding a parasitic wire properly in parallel with the elliptical helical antenna, the axial ratio bandwidth is enhanced, and simple single feeding mechanism is maintained. The simulation by IE3D shows that the CP bandwidth can be increased from 13.6% to 25%, and the directivity is enhanced by 2dB in the frequency band when the eccentricity of the cross-section is 0.94.
Keywords :
antenna feeds; antenna radiation patterns; helical antennas; CP band enhancement; IE3D simulation; circularly polarized wave radiation; cross-section eccentricity; elliptical helical antenna; feeding mechanism; parasitic wire; Antenna measurements; Bandwidth; Dielectric materials; Dielectric measurements; Directive antennas; Frequency; Helical antennas; Impedance measurement; Polarization; Wire;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2007 IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-0877-1
Electronic_ISBN :
978-1-4244-0878-8
DOI :
10.1109/APS.2007.4396166
