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Microstrip Transmission Line Calculator
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The characteristic impedance (Zo) of a microstrip transmission line can be calculated with the active calculator.

[diagram of PCB layers]

Relative Dielectric Constant

εr :

Width of track

W : mm

Thickness of track (1 oz/ft2 = 0.035 mm)

t : mm

Thickness of dielectric

h : mm

Space between traces

s : mm



Linear capacitance (conductor/ground)

Clin : [Farad]

Differential Linear capacitance (conductor/conductor)

Clin diff : [Farad]