Reflected circular polarisation conservation using textured surface

Provided is the first experimental verification that a suitably designed textured surface can reflect a normally incident circularly polarised wave with the same sense. This is achieved by engineering the reflection phase of the orthogonal linearly polarised components of the incident wave by modifying the dimensions of the patches from which the textured surface is constructed such that they are 180deg out of phase with each other. It is shown that the axial ratio of an incident right-hand circularly polarised signal is 0.8 dB at 3.86 GHz and that the reflected signal is also right-hand circular.