A Multilayer Circularly Polarized Ka-Band Phased Array Module using Sequential Rotation

This paper presents a new circularly polarized 4x4 antenna array with beamforming capabilities. The antenna is integrated in a multilayer PCB ready to combine with the remaining RF frontend in a vertical stacking and it can be scaled to fit applications such as new space satellite communications. By using the sequential rotation (SR) technique, it is possible to achieve wide scan angles, both LHCP/RHCP, while maintaining the axial ratio (AR) below 3 dB between 27.5-30 GHz, with a maximum gain of 14 dBi.