Relative Dielectric Constant Calculator for a Circular Capacitor

   The relative dielectric constant (εr) of the dielectric in a parallel plate, circular capacitor can be calculated using the following formula.

[calculation formula]

Where    r = Radius in cm                                 

    C = Capacitance in pico Farads

  d = Dielectric thickness in cm

The calculator is intended for use with the Accurate Method for Measuring Relative Dielectric Constant of a PCB Using a Vector Network Analyser.

Enter the value of the capacitor:   pF
Enter the radius of the circle :    cm
Enter the thickness of the dielectric :    mm Relative Dielectric Constant (εr)  
 

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The calculator uses a derivation of Kirchhoff's formula for a circular capacitor

This calculator is provided free by Chemandy Electronics in order to promote the FLEXI-BOX

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Last modified: March 25, 2008