This free Cable Impedance Calculator helps engineers, technicians, and students quickly determine the characteristic impedance (Z₀) of various transmission lines, primarily focusing on coaxial cables. Optimizing impedance is crucial for signal integrity, minimizing reflections, and ensuring maximum power transfer in RF and high-frequency applications.
Formula:
Z0 = (60 / √(εr)) * ln(D / d)
Where:
- Z0: Characteristic Impedance (Ohms)
- εr: Relative Permittivity (Dielectric Constant) of the insulator
- D: Inner diameter of the outer conductor (shield)
- d: Outer diameter of the inner conductor