A lot of antenna manufacturers (maybe even the majority) advertise the -6db beamwidth these days... and some list both.
I've opened up a few different brands of 2.4ghz dual polarity omnis, and the guts looked pretty much identical on all of them, so I'm sceptical that there's really much difference in performance between any of them... but I haven't used any KPP 2.4ghz omnis, so I'm not sure if they're the same as some other brands or not. On Fri, Apr 26, 2019 at 1:03 PM Mike Hammett <[email protected]> wrote: > A lot of the measurement stuff is for the birds anyway. Use it to get in > the same ballpark, but then actually look at the darn patterns. > > > > ----- > Mike Hammett > Intelligent Computing Solutions <http://www.ics-il.com/> > <https://www.facebook.com/ICSIL> > <https://plus.google.com/+IntelligentComputingSolutionsDeKalb> > <https://www.linkedin.com/company/intelligent-computing-solutions> > <https://twitter.com/ICSIL> > Midwest Internet Exchange <http://www.midwest-ix.com/> > <https://www.facebook.com/mdwestix> > <https://www.linkedin.com/company/midwest-internet-exchange> > <https://twitter.com/mdwestix> > The Brothers WISP <http://www.thebrotherswisp.com/> > <https://www.facebook.com/thebrotherswisp> > > > <https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg> > ------------------------------ > *From: *"Dan Spitler" <[email protected]> > *To: *"AnimalFarm Microwave Users Group" <[email protected]> > *Sent: *Friday, April 26, 2019 12:59:02 PM > *Subject: *Re: [AFMUG] Customer signal issues: UBNT versus KP Performance > 2.4 omni's > > Ubnt advertises the -6 dBi beamwidth vs the typical -3 dBi. > In the case of the omni, there's a -5 dBi falloff in the H chain at "0°" > and "180°" > > On Fri, Apr 26, 2019 at 10:44 AM Robert Andrews <[email protected]> > wrote: > >> I also thought that UBNT also measured their antennas differently than >> most everyone else? But I believe they did so to give better numbers >> than competitors, which would actually give worse numbers to the cpe's >> in the field? Just saying that 13 ubnt does not equal 13 with anyone >> else? >> >> Best, >> Robert >> >> On 04/26/2019 09:21 AM, Matt Corcoran wrote: >> > The omni radiation patterns are not perfectly round. Maybe the >> > Ubiquiti antenna was pointed optimally at them while the new antenna >> is >> > not, or is better rounded. >> > >> > Also the gain varies within the frequency range. Old antenna might >> have >> > been target more towards wifi, while the other might be targeted more >> > for 2.5/2.6ghz BRS/EBS LTE. >> > >> > Both should have graphs so you can see the differences. >> > >> > *Matt* >> > >> > *From: *AF <[email protected]> on behalf of Jay Weekley >> > <[email protected]> >> > *Reply-To: *AnimalFarm Microwave Users Group <[email protected]> >> > *Date: *Friday, April 26, 2019 at 12:12 PM >> > *To: *AnimalFarm Microwave Users Group <[email protected]> >> > *Subject: *[AFMUG] Customer signal issues: UBNT versus KP Performance >> > 2.4 omni's >> > >> > After a storm we noticed that customer signal levels dropped a lot on a >> > 2.4 GHz omni. Especially the received signals on the AP. Water had >> > gotten in so we replaced the omni, radio and the connectors and the >> > signal levels were better but didn't return to their original levels >> and >> > are still about 5 db lower than they were before the storm. The >> original >> > omni was a Ubiquiti AMO-2G13 and was replaced with a 13 dBi >> > KPPA-2GHZ-DPOMA-WC-2. >> > >> > The Ubiquiti antenna has 2 degrees of downtilt versus 1 with the KP >> > Performance antenna. Would this be enough difference to cause the >> > problem? What else could it be? >> > >> > Here are the antenna data sheets: >> > KP Performance antenna. >> > https://streakwave.com/mmSWAVE1/Video/amo_ds_20170106.pdf >> > < >> https://streakwave.com/mmSWAVE1/Video/amo_ds_20170106.pdf?fbclid=IwAR2W3cHhzAJtt2pIxOoqbWsgj0_UwOTjfpCXi5QhKf8llEoJ0KchQtVBy7g >> > >> > >> > Ubiquiti antenna >> > https://www.streakwave.com/…/KPPA-2GHZ-DPOMA-WC-2_datasheet… >> > < >> https://www.streakwave.com/mmSWAVE1/Video/KPPA-2GHZ-DPOMA-WC-2_datasheets_US.pdf?fbclid=IwAR3Fffk8DlLf21wvYH_eidyLy2ndaZe-qhb_17LBVF_NGz7OEla1dp5a1_E >> > >> > >> > -- >> > *Jay Weekley* >> > *Cyber Broadband >> > * >> > >> > < >> http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient >> > >> > >> > >> > >> > Virus-free. www.avg.com >> > < >> http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> >> >> > >> > >> > >> > >> >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com > > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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