Rocket/Omni

[drwho17]

We have a tower that is difficult to access, and many smaller towers around it that we would like to feed. I would like to feed these outlier sites, I think I could do it with an omni at 5.8. I'm trying to think of a good way to do it with two omni's, so I can get both chains for higher bandwidth. I would AP WDS the rocket on the main tower, and Station WDS all the outliers (dedicated station wds for backhaul). Is this possible, is there a magic antenna that will do what I want? Can I use a Vertical and Horizontal omni as a pair in 5.8?

[Dave-D]

Ubiquity responded to this before,
and said 'you're on your own'.
Rocket M was designed for dual-
polarity highly-isolated antennas,
and they haven't tested or
approved any omni configurations.

Because an omni has such a broad
pattern, I think you'd have a very
hard time isolating two--even
with cross-polarity. For 2X MIMO,
Ubiquity talks about at least
20 to 25dB isolation between
chains. Do you really think
you can achieve that?

The classic solution of course is
multiple Rockets and sectors. Dave

[UBNT-Mike.Ford]

Ubiquity responded to this before,
and said 'you're on your own'.
Rocket M was designed for dual-
polarity highly-isolated antennas,
and they haven't tested or
approved any omni configurations.

Because an omni has such a broad
pattern, I think you'd have a very
hard time isolating two--even
with cross-polarity. For 2X MIMO,
Ubiquity talks about at least
20 to 25dB isolation between
chains. Do you really think
you can achieve that?

The classic solution of course is
multiple Rockets and sectors. Dave

This is correct.

Thanks,

Mike

[Nightfall]

If you absolutely have to use Omni's you can try Superpass Antennas.

I just had them make two Omni's for me in the 5GHz range for the two Rocket M5's I got the other day.

Here are the specs:

1. 5.2 -5.9Ghz Omni, V-Pol, 8dbi, V beam 12 deg.
2. 5.2-5.9Ghz, Omni, H-Pol. 6.8dbi, V beam 20 deg.

The Cross Pol cancellation is -22dbi, both are N female connector, bottom feed, Panel omni type.

The antennas cost $159 USD each.

In my case it was more economical, ie all I was budgeted for, to use omni's on several cranes on the Mississippi river.

[jjanosec]

What about this omni antena?

http://www.i4wifi.cz/default.asp?cls=stoitem&stiid=1584

Can be securely used with Rocket M5?

[Dave-D]

That is a very strange antenna.

First, it says it's a dual polarized
omni with two connectors. But
in the description, it says it's a
horizontal-polarized antenna,
with 360deg H and 11deg V.

It clearly can't be both. Dave

[Nightfall]

The only other place I have been able to find with any information on this antenna is here: http://www.dawicom.com/English/default.htm

The description offered leads me to believe that the antenna contains two horizontally polarized omni's. I suppose this is for antenna diversity but with the elements being so close together that strikes me as rather silly.

[Dave-D]

Yep--me too.

Seems a bit like black magic. You
need an antenna that has two
separate chains; that means two
distinct radio paths in any specific
direction (to the client radio). Dave