Does someone have the formula for antenna length vs. frequency?
Wavelength (in meters) of a signal (in MHz) is 300/F which is the relation ship of the speed of propagation (speed of light = 300 million meters/sec) and the frequency. Antennas are generally a fraction of the wavelength. A common basic antenna is the 1/2 wavelength dipole. This has two 1/4 wavelength elements coming from a center feed point. Another common antenna is a 1/4 wave vertical with counterpoise radials angled slightly down from the horizontal. In either case, the element length is 1/4 wavelength. Other fractions of the wavelength can be used, but the impedance matching becomes more complex. So, for a 1/4 wavelength antenna element divide your result by 4.
