Bandwidth of circularly polarized reflectarray and array lens elements

The idea of using element rotation to provide phase shift for circularly polarized (CP) reflectarray antennas is studied here. Investigations on these antenna sub-types often involve element design and the simulation as well as measurement of phase shifting properties using a waveguide simulator. Modern refiectarray antennas are typically fabricated using dielectric laminates. For passive elements, the use of a ground plane and low-loss materials allow for linear polarization reflection coefficient magnitudes that are nominally equal to 1. These results have shown that successful operation can be achieved for a range of dielectric thicknesses and so standard material sizes can be used.