A six-elements circularly polarized sequential array for dedicated short range communications in C-band

In this paper an antenna array operating in circular polarization in the C-band is presented. The array is based on the sequential rotation architecture, applied to six elements, and arranged in hexagonal shape. Thanks to its geometry, the array is suitable for tiling of surfaces as well as for regular solid arrangement. Satisfying experimental validation of a prototype based on the proposed design is observed, with a peak gain of 10.4 dB at 5.8 GHz maintained within 3 dB over a 500 MHz band, a very wide 10 dB return loss bandwidth of 3 GHz, and a 3dB axial ratio bandwidth of 400 MHz, meaning 6% of fractional bandwidth.