Methods and compositions for energy dissipation

A composition for energy dissipation 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 having variable permittivity and substantially static permeability, wherein the conductive filler is 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 dissipation of incident electromagnetic radiation is substantially optimized in at least a portion of the frequency range from about 1 GHz to about 20 GHz, and
• wherein, below full electrical percolation, the reflectivity of the composition is minimized.