Ground plane impact on quadrifilar helix antenna performance with respect to deployment heights

Muhammad Ahmad, Asim Ali Khan*, Muhammad Amin, Hafiz M. Asif, Sobia Baig

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Quadrifilar helix antenna (QHA) has its applications in satellite communications. This paper presents the performance optimisation of input and radiation characteristics of QHA in the presence of infinite and finite metallic ground planes. For the infinite ground plane, it has been observed that input parameters such as impedance and voltage standing wave ratio (VSWR) are stable, and the antenna has broader half power beamwidth (HPBW). Smaller metallic platforms that act as finite ground planes produce better 3-dB axial ratio beamwidth and boresight axial ratio. Deployment of QHA on smaller metallic platforms such as nanosatellites and CubeSats enhances the circularly polarised beamwidth of the antenna with improved boresight axial ratio. However, on large low earth orbit (LEO) satellites, stable input characteristics and broader HPBW have been achieved at the cost of narrow circularly polarised beamwidth and degraded boresight axial ratio.

Original languageEnglish
Article numbere4075
JournalInternational Journal of Communication Systems
Issue number14
Publication statusPublished - Sept 25 2019
Externally publishedYes


  • helix antenna
  • RF measurements
  • satellite antennas
  • satellite communication
  • wideband antennas
  • wire antennas

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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