Circular Polarized Reflectarray Antenna

In this paper, aperture coupled dielectric resonator antenna loaded with rotated strip, is used as a CP element for reflectarray antenna. Phase variations are obtained by asymmetric change in the length of the stub. The effect of the various parameters of the structure on the slope of the phasecurve is studied. Simulations are carried out with Ansoft HFSS software. Linear phase curves with more than 400 degrees phase shifts are achieved in 21 percent frequency bandwidth. Finallyaxial ratio performance of an array with 256 elements is calculated using the finite integration technique (FIT) in CST MWS software.

Keywords:

dielectric reonator antenna , reflectarray antenna , axial ratio bandwidth