[Lf] [Fwd: LF: Inverted V on LF?]

[Andre' Kesteloot]

Rik Strobbe wrote:

> At 10:39 18/02/00 +0100, DL1SAN wrote:
> >I thought about an symetrical antenna for LF. The antenna could be an
> >inverted V arrangement with a length of 2 X150 m. A practicable hight is
> >about 20m for the feeding point. Has anyone experience with this kind of
> >antenna? What is the difference to a marconi system or a top loaded
> >vertical?
> >May be this is a stupide question. Even so....
>
> Main difference is that a marconi antenna (with or without toploading) has
> vertical polarisation while a short horizontal dipole (300m = 0.14
> wavelengths) will be horizontal polarized.
> In all LF handbooks you find that a horizontal polarized antenna is rather
> useless because :
> 1. you will have no surface wave (as you need a vertical polarized signal
> for that).
> 2. for horizontal polarized antennas at very low height (20m = 0.009
> wavelengths) the signal will be 'canceled out' by reflections at the ground
> (or by the 'mirror antenna' that is at 20m below the ground and is in
> counterphase with the real antenna)
>
> But this last may only be partially true as ground is far from perfect at
> most 'amateur locations'.
> The only way to find out wether it works or not is to try it.
>
> 73, Rik  ON7YD