Compact VHF quadrifilar helix antenna

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.

[1]  A. Sharaiha,et al.  Compact printed quadrifilar helical antenna , 2007 .

[2]  C. Kilgus.  Resonant quadrafilar helix , 1969 .

[3]  H. Aubert,et al.  Design and experimental validation of a compact quadrifilar helix antenna in VHF band , 2009, 2009 Asia Pacific Microwave Conference.

[4]  S. Saunders,et al.  Meander line technique for size reduction of quadrifilar helix antenna , 2002, IEEE Antennas and Wireless Propagation Letters.

[5]  J. Kraus,et al.  The Helical Antenna , 1949, Proceedings of the IRE.

[6]  H. Aubert,et al.  L-band compact printed quadrifilar helix antenna with ‘Iso-Flux’ radiating pattern for stratospheric balloons telemetry , 2008, 2008 IEEE Antennas and Propagation Society International Symposium.

[7]  H. Aubert,et al.  Miniaturization of quadrifilar helix antenna for VHF band applications , 2009, 2009 Loughborough Antennas & Propagation Conference.

[8]  Steven Gao,et al.  Meandered Variable Pitch angle Printed Quadrifilar Helix Antenna , 2009, 2009 Loughborough Antennas & Propagation Conference.

[9]  Nelson J.G. Fonseca and Herve Aubert.  Compact Helical Antennas - A Review , 2010 .

[10]  N. Fonseca,et al.  Height Reduction of the Axial-Mode Open-Ended Quadrifilar Helical Antenna , 2010, IEEE Antennas and Wireless Propagation Letters.

[11]  H. Aubert,et al.  Compact printed quadrifilar helix antennas for stratospheric balloons telemetry , 2007, 2007 IEEE Antennas and Propagation Society International Symposium.

[12]  C. Kilgus.  Multielement, Fractional Turn Helices , 1968 .