Skin Depth
HF Conductor Analysis
20.9
µm (Micrometers)
Current density is highest at the surface. At this depth, 63.2% of current is contained in the outer ring.
The Skin Depth (δ) is the distance into a conductor where the current density drops to 1/e (about 37%) of its surface value.
The Mathematical Formula:
ρ: Resistivity of the material (Ω⋅m).
f: Frequency (Hz).
μ0: Permeability of free space (4π×10−7 H/m).
μr: Relative permeability of the material (usually 1.0 for non-magnetic metals).