900 Mhz - Non line of site

Hi,

I want to be able to connect two locations (approx 4 miles) that do
not have clear line of site. There is some wooded areas between the
two locations. Aside from that there are no obstacles in the way.

I have access to some LinkSys WRT54G's - Is there anyway to make this
work?

I guess what I am not clear on is whether it as simple as using 900Mhz
antennas in stead of the 2.4 Ghz ones. If so, does anyone have any
links to sites where people have done such a thing?


Thanks

On 4 Feb 2005 07:36:48 -0800, (E-Mail Removed) (kinghammer_head99) wrote:

>Hi,
>
>I want to be able to connect two locations (approx 4 miles) that do
>not have clear line of site. There is some wooded areas between the
>two locations. Aside from that there are no obstacles in the way.

A pair of high gain antennas at a mutually visible third location (say, top
of a hill), coupled together, one aimed at one site and one at the other,
could serve as a no-power-needed passive relay. You'd need good power
output and a good directional antenna at both of the active sites, most
likely.

>I have access to some LinkSys WRT54G's

These can be modified to serve as relays, but they will need power to run
them... less than an amp. The Sveasoft firmware allows you to alter the
operating power, so you can reduce the power consumption to the minimum
needed, and feed one from a solar panel/battery combo, if there's no power
at the relay point.

>I guess what I am not clear on is whether it as simple as using 900Mhz
>antennas instead of the 2.4 Ghz ones.
<snip>

900MHz antennas will not work.

> Hi,
>
> I want to be able to connect two locations (approx 4 miles) that do
> not have clear line of site. There is some wooded areas between the
> two locations. Aside from that there are no obstacles in the way.
>
> I have access to some LinkSys WRT54G's - Is there anyway to make
this
> work?
>
> I guess what I am not clear on is whether it as simple as using
900Mhz
> antennas in stead of the 2.4 Ghz ones. If so, does anyone have any
> links to sites where people have done such a thing?

Requires 900mhz radios for 900mhz antennas. Antennas are tuned to
match the frequency used.
Shooting through trees, especially with leaves is difficult to
accomplish even at 900mhz but it is
the best option due to its longer wave length. How tall are the trees?
Might erect some towers.

On 4 Feb 2005 07:36:48 -0800, in alt.internet.wireless , (E-Mail Removed)
(kinghammer_head99) wrote:

>Hi,
>
>I want to be able to connect two locations (approx 4 miles) that do
>not have clear line of site.

Just a small point of pedantry: its line of /sight/. As in you can see from
one place to the other. The phrase line of site has zero meaning.

--
Mark McIntyre
CLC FAQ <http://www.eskimo.com/~scs/C-faq/top.html>
CLC readme: <http://www.ungerhu.com/jxh/clc.welcome.txt>

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"Airhead" <(E-Mail Removed)> wrote in message news:<4203d771$0$22518$(E-Mail Removed) om>...
> > Hi,
> >
> > I want to be able to connect two locations (approx 4 miles) that do
> > not have clear line of site. There is some wooded areas between the
> > two locations. Aside from that there are no obstacles in the way.
> >
> > I have access to some LinkSys WRT54G's - Is there anyway to make
> this
> > work?
> >
> > I guess what I am not clear on is whether it as simple as using
> 900Mhz
> > antennas in stead of the 2.4 Ghz ones. If so, does anyone have any
> > links to sites where people have done such a thing?
>
> Requires 900mhz radios for 900mhz antennas. Antennas are tuned to
> match the frequency used.
> Shooting through trees, especially with leaves is difficult to
> accomplish even at 900mhz but it is
> the best option due to its longer wave length. How tall are the trees?
> Might erect some towers.

The trees are full size pine trees and various hardwoods. Not sure of
actual heights but I can say that towers would be very expensive at
that height.

Unfortunately there are no mutuially visible high spots so the option
suggested in the first reply would not work for this instance.

Any other ideas? I like the sounds of the 900 Mhz stuff but can't seem
to find the equipment at a decent price. Was hoping to get by with the
type of expense that comes with the standard WIFI access points and
homebrew antennas.

kinghammer_head99 wrote:

> Any other ideas? I like the sounds of the 900 Mhz stuff but can't seem
> to find the equipment at a decent price. Was hoping to get by with the
> type of expense that comes with the standard WIFI access points and
> homebrew antennas.

What you are referring to is one of the HOLY GRAILS of wireless. A cheap
wireless device that shoots through trees and other obstacles, doesn't
cost much, is very dependable, and is cheap and is low cost. And it
shouldn't be expensive.

(E-Mail Removed) wrote in message news:<(E-Mail Removed)>...
> On 4 Feb 2005 07:36:48 -0800, (E-Mail Removed) (kinghammer_head99) wrote:
>
> >Hi,
> >
> >I want to be able to connect two locations (approx 4 miles) that do
> >not have clear line of site. There is some wooded areas between the
> >two locations. Aside from that there are no obstacles in the way.
>
> A pair of high gain antennas at a mutually visible third location (say, top
> of a hill), coupled together, one aimed at one site and one at the other,
> could serve as a no-power-needed passive relay. You'd need good power
> output and a good directional antenna at both of the active sites, most
> likely.
>
> >I have access to some LinkSys WRT54G's
>
> These can be modified to serve as relays, but they will need power to run
> them... less than an amp. The Sveasoft firmware allows you to alter the
> operating power, so you can reduce the power consumption to the minimum
> needed, and feed one from a solar panel/battery combo, if there's no power
> at the relay point.
>

Thanks for the reply. Was wondering if you could clarify this for me.
Does this require that the relay point have two radios configured as
relays or is it one radio configured as a relay with two antennas?
(each pointed to a separate location).



> >I guess what I am not clear on is whether it as simple as using 900Mhz
> >antennas instead of the 2.4 Ghz ones.
> <snip>
>
> 900MHz antennas will not work.

Mark McIntyre <(E-Mail Removed)> wrote in message news:<(E-Mail Removed)>. ..
> On 4 Feb 2005 07:36:48 -0800, in alt.internet.wireless , (E-Mail Removed)
> (kinghammer_head99) wrote:
>
> >Hi,
> >
> >I want to be able to connect two locations (approx 4 miles) that do
> >not have clear line of site.
>
> Just a small point of pedantry: its line of /sight/. As in you can see from
> one place to the other. The phrase line of site has zero meaning.

Thanks