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Coplanar Capacitance

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Coplanar Capacitance

Coplanar Capacitance Model
Capacitance between two coplanar flat conductors is:
CapacitanceCoplanarNarrowFormula
CapacitanceCoplanarWideFormula

Units: Farads

Description
The capacitance calculated using this tool is the capacitance between two coplanar flat conductors.

Assumptions and Limitations
Dimensions are in meters.
Conductors are assumed to have zero thickness.
Conductors are assumed to be embedded in a homogeneous medium having permittivity e=e0er and permeabilityu=u0.

Constants
Permeability of free space: Formula, Permeability of Free Space H/m
Permittivity of air: Formula, Permittivity of Air F/m
Speed of light in a vacuum: Formula, Speed of Light in Vacuumm/s

Reference: “Analysis of Multiconductor Transmission Lines,” 2nd Ed., Clayton R. Paul, 2008.

Inputs

Width
w
Separation
s
Length
l
Relative Permittivity

Outputs

Capacitance: C = 
3.818e-12 F
Calculations provided on this page are a simplified subset from EMI Analyst models.
Many conductor properties are frequency dependent and dynamically affect electromagnetic characteristics of circuitry and systems.
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