Integrated Quadrifilar Helix at C-band for spacecraft omni antenna system

Abstract

In this paper, design of a circularly polarized (CP) Quadrifilar Helix antenna (QFH) is discussed. QFH provides a circularly polarized cardioid-shaped radiation pattern with a high front-to-back ratio, better circular symmetry in the pattern and very good cross-polarization discrimination over wide coverage. Realization aspects and the measured results of the QFH are discussed here. This antenna is proposed to be used for transmission of satellite telemetry data with Omnidirectional coverage in C-band for India's all upcoming GEO-Stationary and navigational satellites.