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 [cid:[email protected]] [https://ipmcdn.avast.com/images/icons/icon-envelope-tick-green-avg-v1.png]<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>
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