DocumentCode
593630
Title
Compact VHF quadrifilar helix antenna
Author
Takacs, Alexandru ; Idda, T. ; Aubert, H. ; Diez, H.
Author_Institution
LAAS, Univ. of Toulouse, Toulouse, France
fYear
2012
fDate
Oct. 31 2012-Nov. 2 2012
Firstpage
524
Lastpage
527
Abstract
This papers addresses the miniaturization of quadrifilar helix antennas (QHAs) for space application. An innovative miniaturization technique combining modified fractal curves and sinusoidal profiles is proposed in order to fit the dimension of QHA with the launching constraints. Reduction size ratio up to 70% is obtained without a significant degradation of the radiation pattern, directivity, polarization purity and input matching. The impact of the miniaturization technique as function of the relative height is analyzed and several conclusions are conducted.
Keywords
VHF antennas; antenna radiation patterns; fractals; helical antennas; polarisation; QHA; compact VHF quadrifilar helix antenna; directivity; innovative miniaturization technique; launching constraints; matching; modified fractal curves; polarization purity; radiation pattern; reduction size ratio; sinusoidal profiles; Antenna radiation patterns; Fractals; Helical antennas; Impedance matching; Wires; compact antenna; helical antenna; miniaturization; optimization;
fLanguage
English
Publisher
ieee
Conference_Titel
Radar Conference (EuRAD), 2012 9th European
Conference_Location
Amsterdam
Print_ISBN
978-1-4673-2471-7
Type
conf
Filename
6450750
Link To Document