|
The large 3 ft 18 dbi round one sure looks cool,
when you have space to mount a 3 ft parabolic dish. Not many homeowners would
allow that one on the roof. However, I'm scared to use the 15 dbi ones, Its the
same grid as 2.4Ghz. I have a hard time believing a grid designed for
2.4Ghz works well for 900Mhz as well. I have no testing experience with it to
know one way or the other.
We've used the Pac Omnis, solid parabolics, and
panels, andthey've all worked well as spec'd.
Tom DeReggi
RapidDSL & Wireless, Inc
IntAirNet- Fixed Wireless
Broadband
----- Original Message -----
Sent: Monday, February 13, 2006 8:11
PM
Subject: RE: [WISPA] 900 client and omni
antennas
What about the pacwireless
grid’s?
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On
Behalf Of Tom DeReggi
Sent: Monday, February 13, 2006 2:11
PM
To: WISPA General
List
Subject: Re: [WISPA] 900
client and omni antennas
The best client antenna in 900
depends on the typical weather / environment, not just specifically best
antenna.
To combat heavy foliage in very
Rural areas (dry summer months), M2inc's - 17 dbi Yagis have been
invaluable to gain maximum RSSI, to penetrate the trees. However, they
become useless in Winter weather, when they get ice buildup on
them.
In a ice/snow heavy environment,
panel antennas are MUCH better, for example the built-in 10dbi antenna of
Trango 900 radios, to get max allowed RSSI in a weather resistent panel
enclosure. The F/B is poor (only 12 db), but often the best choice for
ease, cost, and Dual pol flexibilty.
In high noise areas, such as Urban
or colocated near paging gear, a high quality antenna like MTI's 10 dbi
panel, offers maximum F/B ratio, to block out interference. Not much
can out perform them, but at a trade off of cost and flexibility of pol change
on the fly.
When Yagi's can be mounted low for
easy access, (within Gorilla Ladder height (18 feet), and for residential
where I can afford to take the risk of not having pol change on the fly
(usually consistent noise floor on a polarity), I don't hesitate to
install a Yagi as my first choice. Often Verticle is less desirable
interference any way, based on paging companies. However, for critical
links, installing the M2inc yagis are risky. They mounting method is horrible.
It allows a lot of play for the Yagi to move in heavy winds. If mounted
high on a steep roof, I avoid the Yagi unless they are absolutely necessary,
because they need mcuh more frequent attention. For example to wipe the snow
off of them, or re-align.
There are someother Yagis that
have more secure double point mounts, around 12-15 dbi, if you can afford to
give up the 2 db.
As for verticle Omni type client
antennas, for example for mobile apps, I have no
advice.
Tom DeReggi
RapidDSL & Wireless,
Inc
IntAirNet- Fixed Wireless Broadband
----- Original Message -----
Sent: Monday,
February 13, 2006 1:11 PM
Subject: [WISPA]
900 client and omni antennas
What are the 900 client antennas
of choice as well as omni directionals. I would like a solution that
can get 5-6 miles NLOS. We don’t have a lot of dense foliage that we
have tried to penetrate up until now but are looking for a solution for
select cells.
Respectfully,
Rick
Harnish
President
OnlyInternet
Broadband & Wireless, Inc.
260-827-2482
Office
260-307-4000
Cell
260-918-4340
VoIP
www.oibw.net
[EMAIL PROTECTED]
--
WISPA Wireless List:
wireless@wispa.org
Subscribe/Unsubscribe:
http://lists.wispa.org/mailman/listinfo/wireless
Archives:
http://lists.wispa.org/pipermail/wireless/
--
No virus found in this incoming message.
Checked by
AVG Free Edition.
Version: 7.1.375 / Virus Database: 267.15.6/258 - Release
Date: 02/13/2006
--
No virus found in this outgoing message.
Checked by
AVG Free Edition.
Version: 7.1.375 / Virus Database: 267.15.6/258 - Release
Date: 02/13/2006
--
WISPA Wireless List:
wireless@wispa.org
Subscribe/Unsubscribe:
http://lists.wispa.org/mailman/listinfo/wireless
Archives:
http://lists.wispa.org/pipermail/wireless/
|
