Antenna Balanced Feeder Calculator

This section provides an Antenna Balanced Feeder Calculator for determining impedance. It is a balanced feeder impedance calculator. It calculates impedance based on the distance between conductors, the diameter of the conductors, and the dielectric constant.

Antenna Balanced Feeder Impedance calculator example:

• INPUTS:
  • Distance = 10 mm
  • Diameter = 2 mm
  • Dielectric constant = 2.3
• OUTPUT:
  • Impedance = 182.2 Ohm

Balanced Feeder Impedance Equation/Formula

A balanced feeder, sometimes called a twin-lead feeder, is constructed from two parallel conductors with identical diameters. These conductors are arranged concentrically, ensuring that current flows through each wire with the same magnitude but in opposite directions.

This arrangement causes the electromagnetic fields to largely cancel each other out, minimizing radiation from the feeder and preventing the pickup of external power.

The following is the balanced feeder impedance equation/formula:

Where:

• D = Distance between the two conductors used in the balanced feeder
• d = Outer diameter of the conductor used in this balanced two-wire line
• ε = Dielectric constant of the material used between the two wires (typically a plastic with a value between 1.5 and 3.5)