[MLB-WIRELESS] Directional antenna's - non LOS.

[Michael Nardella]

If you can't go through, try going around. See if you can bounce off another
building etc.

Michael Nardella vk3ps

-----Original Message-----
From: owner-melbwireless at wireless.org.au
[mailto:owner-melbwireless at wireless.org.au]On Behalf Of
bchild at wireless.org.au
Sent: Tuesday, 11 February 2003 3:08 PM
To: melbwireless at wireless.org.au
Subject: Re: [MLB-WIRELESS] Directional antenna's - non LOS.


Lucas,

My understanding over wireless technology over the past 3yrs now that I've
been working on it personally has changed.  No conditions are ever the
same, nothing ever really follows all the theories that are laid it.  IMHO
it's a matter of trail & error.  Basically try setting you link up the
best you can, run either some directional parabolic antennas (ex-galaxy
etc) or use some yagi design antenna.

If resources were available to you, then use some large 24dbi antennas,
then work down the scale till you got no signal, that should tell you what
kinda effects your signal is up aginst.

In the same respect, I did this then just ended up using higher gain 24db
& 21db antennas which made the world of difference between a 1-2mb link
and a 11-22mb link.

my 2cents

Regards
Glen

> I was thinking about attempting setting up a wireless connection with a
> colleague of mine.  However, there's a tall block of flats in between
> us.
>
> Has anyone had any success with using directional (c)antenna's to
> connect 2 points that don't have LOS?  The distance between us is 820m
> and the flats are fairly narrow.
>
> To put it another way.  My understanding of wlan technology is that with
> omni-direction antenna's you can connect through walls, but over a tiny
> distance.  Can I use directional antenna's to connect through walls
> (well - a building) over a longer distance?
>
> There's also the possibility that the flats may impact only slightly or
> not at all on the direct LOS.  In this case, over the 820m distance how
> much  effect would you imagine the building would have if it's within
> the fresnel zone?
>
> Obviously the connection quality would not be that great.  But, even 1
> or 2Mbps would still be cool.  No one seems to have really discussed
> this anywhere (perhaps because it's a stupid idea).
>
> Thanks in advance.
>
> Regards,
>
> [ lucas ]



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