Wire over Ground Impedance Calculator

What is the wire over Ground Impedance Calculator? 

This online wire over ground impedance calculator is used to calculate the characteristic impedance (Zo) of wire over ground geometry by entering the wire diameter(d), wire height (H) from the ground, and relative dielectric constant εR (= 1 for air).

What is wire over ground geometry?

The transmission line is a conductor (wire) or conductors (wires) designed to carry electricity or an electrical signal over a large distance with minimum loss and less distortion. The transmission lines take many forms to accommodate a particular application's needs. The wire over ground is the one of the transmission line geometry where one wire/conductor having a diameter (d) is positioned at a height (H) from the ground. This transmission structure is used in rural electrification.

The formula calculating the characteristic impedance of the wire over ground structure transmission is given below. 

Where,

H - Height of the wire/conductor above the ground

d - Diameter of the wire/conductor

ε_R - Relative dielectric constant (1 for air).