There will be differences. Hopefully not terribly significant over the small
bandwidth you mention but from 4.9 to 5.9 GHz they will indeed have significant
differences.
From: Eric Muehleisen
Sent: Wednesday, February 18, 2015 12:01 PM
To: af@afmug.com
Subject: Re: [AFMUG]Decent "true" DP 120° sector in 5 GHz
Are you saying that antenna patterns could have a significant difference
between 5740 and 5780 on some antennas?
On Wed, Feb 18, 2015 at 12:41 PM, Chuck McCown <ch...@wbmfg.com> wrote:
And that plot is for one specific frequency. They frequently do not tell you
the test frequency. I have had antennas have horrible ugly plots at some
frequencies but nice ones at other frequencies.
From: Mathew Howard
Sent: Wednesday, February 18, 2015 11:35 AM
To: af
Subject: Re: [AFMUG]Decent "true" DP 120° sector in 5 GHz
Yes, assuming they're accurate, but that may be a lot to assume...
On Wed, Feb 18, 2015 at 12:26 PM, Mike Hammett <af...@ics-il.net> wrote:
Assuming the plots are accurate, they're all that matters.
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
----------------------------------------------------------------------------
From: "Jerry Richardson" <je...@richardson.bz>
To: af@afmug.com
Sent: Wednesday, February 18, 2015 12:22:27 PM
Subject: Re: [AFMUG] Decent "true" DP 120° sector in 5 GHz
That’s what I was basing my first reply on, but then I saw that note.
So, which to believe? The hand drawn plot or the note? LOL
From: Af [mailto:af-boun...@afmug.com] On Behalf Of Mathew Howard
Sent: Wednesday, February 18, 2015 10:12 AM
To: af
Subject: Re: [AFMUG] Decent "true" DP 120° sector in 5 GHz
If the pattern in the spec sheet is accurate, this one looks like it's
actually a bit more than 120 at -3db
http://www.streakwave.com/itemdesc.asp?ic=HW-SA58-120-16D&eq=&Tp=&o1=0
These also look to be a full 120 at -3db
http://www.streakwave.com/itemdesc.asp?ic=SA4958-120-19-D&eq=&Tp=&o1=0
On Wed, Feb 18, 2015 at 11:54 AM, Jerry Richardson <je...@richardson.bz>
wrote:
You are right, there’s a little note that says 120* is -6dB. Bastards…
From: Af [mailto:af-boun...@afmug.com] On Behalf Of Mathew Howard
Sent: Wednesday, February 18, 2015 9:11 AM
To: af
Subject: Re: [AFMUG] Decent "true" DP 120° sector in 5 GHz
That's the one I was talking about, but it's not exactly a real 120
either...
* All beam widths are listed at the 3dB point except for 120° beam
on horizontal polarization is listed at 6dB point
On Wed, Feb 18, 2015 at 11:06 AM, Jerry Richardson <je...@richardson.bz>
wrote:
Here’ a real 120deg dual pol sector.
http://www.streakwave.com/mmSWAVE1/Video/ARC-VS5821SD1_DS_061312.pdf
Jerry
From: Af [mailto:af-boun...@afmug.com] On Behalf Of Bill Prince
Sent: Tuesday, February 17, 2015 5:13 PM
To: af@afmug.com
Subject: Re: [AFMUG] Decent "true" DP 120° sector in 5 GHz
This needs to sync with a full cluster of Canopy APs that is only 3
miles away.
bp<part15sbs{at}gmail{dot}com> On 2/17/2015 5:09 PM, Josh Reynolds wrote:
There is always the business case to use another vendor with lower
ROI.
Josh ReynoldsCIO, SPITwSPOTSjosh@spitwspots.comwww.spitwspots.comOn 2/17/2015
3:50 PM, Bill Prince wrote:
This site is not ABAB. It's not even AB. It is merely A. One
sector; 120° wide, with about 15 subs. About as low as you can go. The problem
is that most of the subs are near the outer edges of a 120° sector. Dividing
it into 2 sectors would be an option if we had (or expected) more subs, but
this one I don't think that will happen. I'm not inclined to burn a Canopy AP
(or two even) on 7 or 8 subs each.
bp<part15sbs{at}gmail{dot}com> On 2/17/2015 12:13 PM, Ken Hohhof wrote:
I think asking for 3 dB down at 120 degrees in dual pol with
matching patterns, good F/B and good sidelobes is not going to happen. I’d plan
on ABAB and look for a 90 degree sector.
Hmmmm, the published patterns for the KPP “Gen III” are kind of
ugly, aren’t they? Plus the HPOL and VPOL azimuth patterns don’t match very
well.
From: Mathew Howard
Sent: Tuesday, February 17, 2015 2:05 PM
To: af
Subject: Re: [AFMUG]Decent "true" DP 120° sector in 5 GHz
I thought the KP sectors were suppose to be -3db at 120... I
think almost everything is rated at -6db now.
On Tue, Feb 17, 2015 at 1:26 PM, Adam Moffett
<dmmoff...@gmail.com> wrote:
The new 120 is the old 90....search for something advertised as
wider than 120 I guess?
What I'm looking for is a 120° sector that drops off no more
than 3db at the edges. The 6 db bull that seems to be common these days is
not what I'm looking for.
Also want good F/B ratio, good cross-pol performance, and
tiny side lobes. In perfect world, it would drop off 30db at 121°.
I want a pony too.
bp<part15sbs{at}gmail{dot}com> On 2/17/2015 10:50 AM, Josh Luthman wrote:
Good drop off is a good thing IMO.
If you want less drop off probably go with an original
Airmax sector. Those things bleed for days and the f/b isn't very good.
We installed half a dozen people 180* off one of them.
Josh Luthman
Office: 937-552-2340
Direct: 937-552-2343
1100 Wayne St
Suite 1337
Troy, OH 45373
On Tue, Feb 17, 2015 at 1:45 PM, Bill Prince
<part15...@gmail.com> wrote:
No one?
bp
<part15sbs{at}gmail{dot}com>
On 2/17/2015 9:55 AM, Bill Prince wrote:
Has anyone found a decent TRUE 120° dual-polarity
sector in 5 GHz? We're using a KP on one of our POPs and the drop-off at
the edge of the 120° is just too much for our taste.
