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. 29 2012-Nov. 1 2012

Firstpage

850

Lastpage

853

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; directive antennas; helical antennas; space vehicle antennas; QHA miniaturization; antenna radiation pattern; compact VHF quadrifilar helix antenna; directive antennas; innovative miniaturization technique; input matching; launching constraints; modified fractal curves; polarization purity; relative height; sinusoidal profiles; space application; Antenna radiation patterns; Fractals; Helical antennas; Impedance matching; Wires; compact antenna; helical antenna; miniaturization; optimization;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference (EuMC), 2012 42nd European

Conference_Location

Amsterdam

Print_ISBN

978-1-4673-2215-7

Electronic_ISBN

978-2-87487-026-2

Type

conf

Filename

6459159