antenna.barko.devby Rothammel

basicutilityfeedlinecoax

Coax Impedance

Calculate coaxial cable impedance from geometry

Source: Rothammel, Vol. 1, Ch. 5.1, p. 79

Input Parameters

Insulation Outer Diameter (D)

mm

Center Conductor Diameter (d)

mm

Dielectric Constant (ε)

Results

Characteristic Impedance

82.4Ω

Velocity Factor

0.659

Capacitance per metre

61.4pF/m

Inductance per metre

417.6nH/m

Diagram