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Written by Start a WISP Site Admin
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Friday, 29 April 2005 |
"I have used Panel antennas for all of my installs and some sectors at
some locations for my APs. I have to seperate them alot on the tower to
keep down interference.
I have seen many towers in the city
and in photos that use grid antennas right next and behind each other.
Do grids cause less interference than panel antennas? I know most grids
are for PtP not PtMP unless in adhoc mode. I use 2.4 freq would grid
antennas cause less interference than panel or sectors?
I have
several areas where the houses are very close together 50 or more.
Would adding a grid on the tower and pointing it to a housing
development where houses are close together cause less interference
than a panel or sector for PtMP. Houses are very close.
I have
been trying to hit a few housing developments with one panel or sector
which works fine but I get alot of disconnects that are only for a
second or so but VOIP users are complaining. Thanks"{mos_sb_discuss:7}
cmaenginsb:
Grids typically have better front to back ratios so in those cases they
will work better. However because the feedhorn sticks out from the grid
they are still vulnerable to sidelobe interference, but because of how
a grid works it's not being collected so the gain is fairly low.
19
DB grids have the same beamwidth as 19 db panels, we actually only used
a panel at a customer location if we were concerned about looks.
For
distribution though, the design of the sector (and a "smart" antenna
like the Vivato) gives an ideal beamwidth. We have used grids for
distibution in a few cases where we only needed to cover a 7 degree
swath.
Original thread location
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Sample Networks 
