Scattering phase performance of varactor diode across ring's gap reconfigurable reflectarray element

This paper presents an investigation of scattering phase of reflectarray element in double split ring shape integrated with varactor diode across the gap for feasibility of reflectarray antenna in beam scanning approach. The paper contributes simple design with single substrate and single varactor diode at Ku-band for space communication. The reflected phase and reflection loss curves for reflectarray element with different combinations of radius and gap have been investigated and analyzed. The simulation executed by commercial full-wave electromagnetic software CST MWS demonstrates at 15.123 - 17.028 GHz operating frequencies with phase variation up to 3000 and offers low reflection loss within the range -0.65 to -1.3 dB.