Abstract
A single-layer linearly polarized reflectarray element namely Concentric Circle Square Ring (CCSR) for Ku-band is presented in this paper. The adjustment of the reflected phase of the reflectarray element via variable capacitive loading which is realised by connecting the two rings with varactor diode. By using the full-wave EM field simulator-CST, simulation of the single element to perform exact measurement in standard waveguide were obtained. The measurement indicates that the element with attachment of varactor diode has good capability of changing the reflection phase between 0 to 20 V suppliede to the diode.