Re: NEC-LIST:Imperfect Ground

Mr. Lorentzou

The source of the conductivity and permittivity values I quoted originated
from the NEC list.
Dr Nitch provided me with the values but the NEC-list message where the
values originated came from Prof DC Baker.
That message was dated Tuesday 30 May 2000 for those who might have NEC list
messages stored that far back.

I think the values were collected over a period of time from observations,
but I may be wrong.

Regards
Renier Dreyer
Development Engineer
Poynting Software

----- Original Message -----
From: "Maria I. Lorentzou" <lorentz_at_power.ece.ntua.gr>
To: "Renier Dreyer" <renier.dreyer_at_poynting.co.za>
Sent: Wednesday, November 27, 2002 12:34 PM
Subject: Re: NEC-LIST:Imperfect Ground

> Mr. Dreyer,
>
> Are the values for ground conductivity and relative permittivity
"empirical"
> ?
> Thank you
>
> M.Lorentzou, PhD
> Researcher
> N.T.U.A., Greece
>
> ----- Original Message -----
> From: "Renier Dreyer" <renier.dreyer_at_poynting.co.za>
> To: <nec-list_at_gweep.ca>
> Sent: ???????, 27 ????????? 2002 12:25 ??
> Subject: Re: NEC-LIST:Imperfect Ground
>
>
> > Hi Yee Hui
> >
> > I found some values for ground conductivity and relative permittivity. I
> do
> > not have a reference for it though.
> > There are different values for different types of ground.
> >
> > Pastoral, low hills, rich soil: Conductivity = 0.0303 to 0.01 S/m and
> > Relative Permittivity = 14-20
> > Flat country, marshy, densely wooded: Conductivity = 0.0075 S/m and
> Relative
> > Permittivity = 12
> > Pastoral, medium hill and forestation: Conductivity = 0.006 S/m and
> Relative
> > Permittivity = 13
> > Pastoral, medium hills and forestation, heavy clay soils: Conductivity =
> > 0.005 S/m and Relative Permittivity = 13
> > Rock soil, steep hills, typically mountainous: Conductivity = 0.002 S/m
> and
> > Relative Permittivity = 12-14
> > Sandy, dry, flat, coastal cities, industrial areas: Conductivity = 0.001
> S/m
> > and Relative Permittivity = 5
> > Cities, heavy industrial areas, high buildings: Conductivity = 0.001 S/m
> and
> > Relative Permittivity = 3
> >
> > Hope this helps
> >
> > Renier Dreyer
> > Development Engineer
> > Poynting Software
> >
> > ----- Original Message -----
> > From: "Lee Yee Hui (Dr)" <EYHLee_at_ntu.edu.sg>
> > To: <nec-list_at_gweep.ca>
> > Sent: Wednesday, November 27, 2002 11:32 AM
> > Subject: NEC-LIST:Imperfect Ground
> >
> >
> > > Hi everybody,
> > >
> > > Good day! Could I find out if anybody has an idea of a
> > > typical ground conductivity and typical ground dielectric constant
> > > value that I can use to model imperfect ground conditions?
> > >
> > > Thank you in advance and have a wonderful day!
> > >
> > > Best regards,
> > > Yee Hui
> > > --
> > > The NEC-List mailing list <nec-list_at_gweep.ca>
> > > http://www.gweep.ca/mailman/listinfo.cgi/nec-list
> > --
> > The NEC-List mailing list <nec-list_at_gweep.ca>
> > http://www.gweep.ca/mailman/listinfo.cgi/nec-list
> >
>

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