The gap with vertical polarization over an average ground is in the poor
energy radiated below the pseudo brewster angle and also the missing of
signal enforcement (up to 6 dB) by ground reflections.
The good with vertical polarization is in a wider vertical lobe that has no
nulls between medium high angles and down to the pseudo brewster one.
Hardly a vertical beam can beat a proper installed horizontal above 10 Mhz,
unless the ground allows very little angles, i.e. 1 deg as it happens over
salt water.
73,
Mauri I4JMY
----- Original Message -----
From: "Valeri Stefanov" <wally@el-soft.com>
To: <n4kg@juno.com>
Cc: <towertalk@contesting.com>
Sent: Saturday, July 06, 2002 12:30 PM
Subject: Re: [Towertalk] Fw: Vertical Monoband Log periodic Antenna for
contesting
> Ok Tom,
>
> What the theory is saying as far as I know is that after first or second
> reflection of the signal it does not matter what the polarisation of the
> signal was at the beggining.
> What seems interesting for me with vertical log periodic antennas is that
> one can use only two antennas to cover almost 360 deg while vertical angle
> is within acceptable range for DX work and working locals as well. Also
one
> will use just two coax cables and will cover all higher bands with still
> acceptable gain especially on 15 and 10m. To build such an antenna one
needs
> only one tall support structure and with two antennas for 360deg coverage
> you are saving a good amount of money because you'll not need a rotator !
> Visit http://www.antenna.be/lpv.html
> and I'll be interested to hear your or others comments.
>
> 73's de Wally LZ2CJ
>
> ----- Original Message -----
> From: <n4kg@juno.com>
> To: <wally@el-soft.com>
> Sent: Friday, July 05, 2002 9:38 PM
> Subject: Re: [Towertalk] Fw: Vertical Monoband Log periodic Antenna for
> contesting
>
>
> > Horizontal polarization will ALWAYS beat vertical polarization
> > unless you are overlooking a saltwater foreground.
> >
> > Tom N4KG
> >
> > On Thu, 4 Jul 2002 "Valeri Stefanov" <wally@el-soft.com> writes:
> > >
> > > Hi Fellow Contesters,
> > >
> > > Yesterday I have seen on the net the pictures of vertical Log
> > > Periodic antennas.
> > > I would like to hear from someone who has built and used such a
> > > vertical Log periodic antennas for 20-15-10m.
> > >
> > > 73's de Wally LZ2CJ
> > >
> > >
> > > --- StripMime Report -- processed MIME parts ---
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