NESS ENGINEERING
TECHNICAL DATA
IMPEDANCE

  2 Parallel Plates Coaxial Cylinders

 

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 cylinder impedance calculation

Equation for coaxial cylinder 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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Ness Engineering, Inc.
P.O. Box 261501
San Diego, CA 92196
(858) 566-2372
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Richard M. Ness and Ness Engineering, Inc.
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