The relative dielectric constant (εr) of the dielectric in a parallel plate, circular capacitor can be calculated using the following formula.
Where r is the Radius in cm
C is the Capacitance in pico Farads
d is the Dielectric thickness in cm
The calculator uses a derivation of Kirchhoff's formula for a circular capacitor and is intended for use with the Accurate Method for Measuring Relative Dielectric Constant of a PCB Using a Vector Network Analyser
This calculator is provided free by Chemandy Electronics in order to promote the FLEXI-BOX
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