Analysis on split concept of reflectarray antenna element for bandwidth enhancement

This paper presents an investigation of bandwidth enhancement of a concentric split ring square reflectarray element in terms of phase and return loss versus frequency graph performance. The performance of element´s phase response is then to be compared to the concentric solid ring square element whereby studies on the phase range and slope are carried out to the variation size of elements within the range 2.63 mm to 4.49 mm. The bandwidth of unit cell element is observed and it has been shown the enhancement of up to 40.7% and 0.5% at dual frequency operation. It can be concluded from this studies that the bandwidth can be pronounced improved by using the split concept into the element for giving significant improvement to the performance of linear phase range, phase slope and inevitable bandwidth. The analysis is executed using the CST Microwave Studio software.