There’s no exact replacements, and the actual model numbers will vary depending on the Meraki access point you’re using. Assuming you are planning to use an MR46E then… AIR-ANT2524DW-R  => MA-ANT-3-B6 Just as you concluded, the are dipoles with an articulated joint.   AIR-ANT2566P4W-R => MA-ANT-3-E6 The Azimuth/Horizontal half power beam width is about half on the Meraki antenna compared with the Cisco one, so you may need some coverage re-work depending on the existing AP placement.   It may be that the C6/D6 (Omni panel) models are a better replacement if the Cisco antennas are ceiling mounted radiating downward.   AIR-ANT2566D4M-R => MA-ANT-3-E6 These will be pretty much the same. The F6 has a narrower beam width (about half that of the E6), so stay with the E6 for the closet match.   AIR-ANT2535SDW-R => I think MA-ANT-3-A6 Spot on, these are non-articulated dipoles.   Hope this helps. ... View more