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.
