# Impedance Formulas

The formulas on this page allow one to calculate the impedance for certain given geometries.  More complex problems typically require one to model the geometry and solve using Finite Element Analysis.

2 Parallel Plane Plates Diagram for Parallel Plate Impedance Calculation Equation for Parallel Plate Impedance Calculation m0 is the permeability (H/m) e is the permittivity (F/m) e0 is the permittivity of free space (F/m) er is the relative permittivity of the dielectric d is the distance between the electrodes (m) w is the width of the electrodes (m)

2 Coaxial Cylinders Diagram for Coaxial Cylindrical Impedance Calculation Equation for Coaxial Cylindrical Impedance Calculation m0 is the permeability (H/m) e is the permittivity (F/m) e0 is the permittivity of free space (F/m) er is the relative permittivity of the dielectric a is the radius of the inner cylinder b is the radius of the outer cylinder

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