Angular Stability of Metasurfaces: Challenges Regarding Reflectivity Measurements [Measurements Corner]

Measurements are usually the final process of a device characterization and show whether the device works properly or needs some readjustments. Measurements are not a trivial issue; they require a lot of time and careful planning to perform them. There are many papers that deal with simulations and characterizations of the metamaterial absorber unit cell [1]-[6], but not all of them carried out the manufacture and measurement of the proposed prototypes.