![[equation for skin depth]](../images/skin-effect-1.gif){kind=small}
Where:
ρ is the resistivity of the conductor in Ω.m
f is the frequency in Hertz
μ is the absolute magnetic permeability of the conductor
The absolute magnetic permeability (μ) = μo x μr
μo = 4π x 10-7 H/m
Calculates the effective skin depth (1/ε) for common conducting materials using the equation and data referenced below.
Note: To use different values for the Resistivity and Relative Permeability, select Enter Data in the Conductor Material selection text box and then enter the required values in the boxes highlighted in amber.
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From Transmission Lines and Networks by Walter C. Johnson, McGraw-Hill 1963 p58.
Nominal depth of penetration for a conductor
Where:
ρ is the resistivity of the conductor in Ω.m
f is the frequency in Hertz
μ is the absolute magnetic permeability of the conductor
The absolute magnetic permeability (μ) = μo x μr
μo = 4π x 10-7 H/m
The values for μr are from Transmission Line Design Handbook by Brian C Wadell, Artech House 1991 Table 9.3.2 page 446.
The values for ρ are from CRC Handbook of Chemistry and Physics 1st Student Edition 1998 page F-88 and are for high purity elements at 20°C.
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