Electromagnetic radiation decoupler, method of making a cardboard decoupler, method of tracking a body or a container, a kit of parts for identification and tracking and method of forming a decoupler

λmin To λmaxElectromagnetic radiation decoupler for decoupling the radiation in the wavelength range. Decoupler, the thickness of the member having at least one first conductive layer and a dielectric layer including a region in contact and the decoupler is λmin/ 4n and n is less than the refractive index of the dielectric. The dielectric layer may be sandwiched between the two conductive layer, one of these conductor layer has a structure described above. In addition, the invention relates to various methods and products containing them using these decoupler.Radiation decoupler, a single island decoupler, body or container, de-coupler forming method, a method body or container tracking or identification