Single-layer frequency selective dual-band reflectarray operating at 28 GHz and 39 GHz

We report a single-layer frequency selective dual band reflectarray operated at 28 and 39GHz simultaneously. The consists of cross dipole spiral elements aligned on the surface substrate surfaces rear side. that can control reflection direction same plane substrate, resulting in simultaneous dual-band up to ±30° independently. Furthermore, showed higher transmittance frequencies except for target frequencies, indicating function only does not interfere with other communication bands.