A circular polarization dual band metamaterial polarization rotator composed of two double split ring resonators rotated 90° with respect to each other is presented. Asymmetric transmission between T xx and T yy and symmetric transmission between T xy and T yx has been achieved. The circular polarization is caused by the symmetric transmission between T xy and T yx . The design has been demonstrated numerically at microwaves frequency. The structure holds promise for ultra-compact polarizing devices for any frequency range given the scalability of the approach.