Discrete metallic particles and multilayer structures comprising reflective core layers

摘要

A metallic component including a metallic material and having a skin depth δ of greater than or equal to 1.0 μm in a frequency range from 20-40 GHz, as calculated by:; δ=2⁢ρ(2⁢π⁢⁢f)⁢(μ0⁢μr)≈5⁢0⁢3⁢ρμr⁢f. ]]> In this equation, δ is skin depth in meters (m); ρ is resistivity in ohm meter (Ω·m); f is frequency of an electromagnetic radiation in hertz (Hz); μ0 is permeability; and μr is relative permeability of the metallic material. The metallic component may be a discrete metallic particle or a layer in a multilayer thin film.