RF Cafe Software

RF Cascade Workbook 2005 - RF Cafe
RF Cascade Workbook

Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel
RF & EE Symbols Word
RF Stencils for Visio

About RF Cafe

Kirt Blattenberger - RF Cafe WebmasterCopyright
1996 - 2016
Webmaster:
Kirt Blattenberger,
 BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:
 AirplanesAndRockets.com

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Skin Depth Calculator

This JavaScript skin depth calculator takes as inputs the frequency, resistivity (ρ), and relative permeability (μr). Calculated values do not change until the "Calculate" button is clicked.

This standard equation is used to compute the skin depth. An explanation can be found here.

Skin depth equation formula - RF Cafe

Since data sources for materials properties typically present permeability in term of relative permeability (μr), that is what is used for input in the calculator.

Most typical materials used for signal and power carrying cables - e.g., copper, aluminum - have a relative permeability of 1. Materials with magnetic properties such as steel and iron have relative permeabilities ranging from hundreds to hundreds of thousands.

Here is a table of materials with values.

Numerical inputs are not error trapped.

Frequency: MHz
  Resistivity (ρ): μΩ∙cm
  Relative Permeability (μr):  
  Skin Depth: μmeters
    μinches