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Rectangular Parallel Plate Capacitance

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Rectangular Parallel Plate Capacitance

Rectangular Parallel Plate Capacitance Model
Capacitance between the parallel plates is:
Formula, Rectangular Parallel Plate Capacitance
Units: Farads

Description
The capacitance calculated using this tool is the capacitance between a pair of parallel rectangular plates.

Assumptions and Limitations
Plates are assumed to be flat and parallel over their surfaces.
Plates are assumed to be negligibly thin.
Plates are assumed to be sufficiently large and sufficiently close together that the effects of fringing fields at the edge of the plates may be ignored.
Plates are assumed to be separated by 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

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

Rectangular Parallel Place Capacitance

Inputs

Width
w
Separation
s
Length
l
Relative Permittivity

Outputs

Capacitance: C = 
3.684e-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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