Transmission Line Rechner — Formel

Transmission Line Propagation

Formulas

v = c x VF (propagation speed)

Delay = Length / v

Electrical Length = 360 x Length / wavelength_in_line

Transmission line effects matter when the line is a significant fraction of the wavelength (typically > 1/10).

Lösungsbeispiel

10 m coax (VF = 0.66) at 100 MHz.

  1. Speed = 299.792 x 0.66 = 197.86 Mm/s
  2. Delay = 10 / 197860000 = 50.5 ns
  3. Wavelength in line = 197.86 / 100 = 1.979 m
  4. Electrical length = 360 x 10 / 1.979 = 1819 degrees