Calcolatore Linea di Trasmissione — Formula

Antenna Length

Formulas

Wavelength = c / f = 299.792 / f(MHz) meters

Half-wave dipole = wavelength / 2

Quarter-wave monopole = wavelength / 4

In practice, antennas are shortened 2-5% due to end effects and conductor diameter.

Esempio Risolto

Design an antenna for 433 MHz ISM band.

  1. Wavelength = 299.792 / 433 = 0.6924 m
  2. Half-wave dipole = 0.6924 / 2 = 34.62 cm
  3. Quarter-wave = 0.6924 / 4 = 17.31 cm