LF: Re: 73KHz beacon

["Alberto di Bene" <dibene@usa.net>]

Rik Strobbe wrote:

> [...]
> A short vertical monopole has a gain of 4.77dBi / 2.62dBd because of its
> radiation pattern, especially the rather 'sharp' vertical pattern.
> This gain of 4.77dBi assumes a perfect ground, so no losses at all.
> [...]
Rik, thanks for the explanations.
I would have never imagined that the gain provided by having a radiation
diagram 'squeezed' in the vertical plane could more than compensate for
the losses caused by the very short dimensions (compared to the wavelength)
of the antenna.  Today I learnt a new one. TNX.

73  Alberto  I2PHD