Development of a single square ring reflectarray element for bandwidth enhancement

A novel element is developed in this research namely single square element for a reflectarray antenna. This element is modified by using a square hole instead of circle hole for a conventional ring element shape. A series of physical size element is investigated and presented in this paper. CST Microstripes is used as the analyzing tool by plotting the graph performance using the phase responses to the size changing. The design procedure and critical parameters consist of phase range and phase slope are discussed. While, waveguide simulator techniques is used as the tool of measurement with the using of RF35 as the substrate material. This substrate is characterized with the dielectric constant of 3.54 and the thickness of 1.524 mm. As the results, the practical phase range achieved is 403° and phase slope is 0.34°/μm at the frequency of 23.7 GHz for a unit cell element.