LF: Fw: Antenna Software

["Dick Rollema" <d.w.rollema@gironet.nl>]

-----Oorspronkelijk bericht-----
Van: Roy Lewallen <w7el@teleport.com>
Aan: Dick Rollema <d.w.rollema@gironet.nl>
Datum: dinsdag 20 juli 1999 19:35
Onderwerp: Re: Antenna Software


> Dick,
>
> Only the professional versions of EZNEC (EZNEC-M and EZNEC/4) directly
> report the ground wave. However, a reasonable approximation of the
> ground wave field strength can be gotten by using the EZNEC near field
> analysis. This is because the "near field" analysis actually calculates
> the total field, both near and far, including the ground wave. The near
> field analysis results are available only as numbers; they are not
> plotted as a graphical pattern.
>
> Roy Lewallen, W7EL
>
> > Dick Rollema wrote:
> >
> > Dear Roy,
> >
> > Quite a few countries in Europe now have made the 136 kHz longwave
> > band available to amateurs.
> >
> > Although at night some sky wave propagation may be present most of the
> > contacts are made via the so called surface wave.
> >
> > I wonder whether EZNEC and ELNEC produce proper radiation patterns for
> > that kind of wave propagation?
> >
> > 73, Dick, PA0SE
> >
> > D.W. Rollema
> > V.d. Marckstraat 5
> > 2352 RA Leiderdorp
> > The Netherlands
> > Tel. +31 71 589 27 34
> > E-mail: d.w.rollema@gironet.nl