Methods and compositions for destructive interference

A composition for destructive interference in at least a portion of the frequency range of from about 1 GHz to about 20 GHz, the composition comprising:

• a dielectric;
• and
• a conductive filler mixed with at least a portion of the dielectric, wherein the thickness of the composition measured from an incident surface is on the order of a wavelength of sensitivity of the composition in at least a portion of the frequency range from about 1 GHz to about 20 GHz.

A composition for destructive interference in at least a portion of the frequency range from about 1 GHz to about 20 GHz, the composition comprising:

• a dielectric;
• and
• a conductive filler mixed with at least a portion of the dielectric, wherein the percentage volume of the conductive filler relative to the total volume of the composition is configured such that a reflective wave of electromagnetic radiation is generated in response to receiving an incident wave of electromagnetic radiation, the reflective wave having a wavelength on the order of a wavelength of the incident wave of electromagnetic radiation.