IMPROVEMENTS IN OR RELATING TO FREQUENCY SELECTIVE SURFACES

摘要

A freestanding frequency selective surface (FSS) is provided which comprises at least one shorted resonance aperture element (12) . The shorted resonance aperture element provides a sensitivity to polarisation. The shorted resonance aperture element may comprise at least one short, which may enable the FSS to be freestanding. The invention further provides an FSS device comprising at least one array of the freestanding frequency selective surfaces, and a method of forming the freestanding frequency selective surfaces .