I’ve used the uptilt mitigation technique, but not had any where near the 
success of just placing a concrete brick on the roof in front of the antenna to 
block the view of the multipath source (I’m dealing with multipath off the SF 
Bay in my links).

 

Peter Kranz
 <http://www.unwiredltd.com/> www.UnwiredLtd.com
Desk: 510-868-1614 x100
Mobile: 510-207-0000
 <mailto:pkr...@unwiredltd.com> pkr...@unwiredltd.com

 

From: Forrest Christian (List Account) <li...@packetflux.com> 
Sent: Wednesday, July 03, 2024 2:05 PM
To: AnimalFarm Microwave Users Group <af@af.afmug.com>
Cc: Peter Kranz <pkr...@unwiredltd.com>
Subject: Re: [AFMUG] Multipath mitigation

 

If that's the case, then maybe some uptilt on the SM, effectively moving the AP 
to the bottom of the pattern might work.  Of course this relies on an antenna 
pattern with fairly sharp cutoff at the edges.

 

On Wed, Jul 3, 2024, 12:50 PM Peter Kranz via AF <af@af.afmug.com 
<mailto:af@af.afmug.com> > wrote:

Easiest solution to this is to position the SM antenna in a location where it 
cannot see the reflected signal from the corn field but still has clean LOS to 
the main beam. We try to get clever about using features on the rooftop, 
building, etc.. to block the multipath reflection.

 

Peter Kranz
 <http://www.unwiredltd.com/> www.UnwiredLtd.com
Desk: 510-868-1614 x100
Mobile: 510-207-0000
 <mailto:pkr...@unwiredltd.com> pkr...@unwiredltd.com

 

From: AF <af-boun...@af.afmug.com <mailto:af-boun...@af.afmug.com> > On Behalf 
Of Steve Jones
Sent: Saturday, June 29, 2024 10:10 AM
To: AnimalFarm Microwave Users Group <af@af.afmug.com <mailto:af@af.afmug.com> >
Subject: [AFMUG] Multipath mitigation

 

Is there an SM side solution for this? We have a handful of customers we have 
to go out twice a year to move their equipment up 5 feet or down 5 feet. In the 
fall, I love to point out they just harvested the field across the road, didnt 
they. theyre always "how did you know"

 

I could take the loss hit in many of these cases to do a splitter and diverse 
antennas, but would that harm or hurt more?

 

Some of them we just have 2 radios installed a spring and fall radio, we just 
have them swap which ones plugged in. 2 450b SMs leaves a lot of budget for 
something that doesnt require touching

 

One of you geeks has to have come up with a solution over the years other than 
truck rolls. 

 

 

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