We have an opportunity to install our antennas on a water tower. We are considering using 4 120deg sector antennas at the 4 compass points. What would be your advice for this type of installation? Should we use 90deg sectors instead? Is there enough separation between the antennas to stay on the same channel?
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I think three 120degree sector deployments on 5Ghz is typical.
Yes, I agree with Darryl on the separate frequencies. In our county, we have equipment on three water towers.
Orv W6BI
Thanks for the help. We were thinking that the separation between the antennas with the water tank would be enough, but I guess it isn't... Are 4 90deg sectors preferable to 120deg?
I can't think of a compelling reason to use the 90° sector antennas. They'd increase the price of this implementation by 33%,.. not to mention consume an additional port on your PoE switch. The 90° sectors are 1 dB higher gain, but that's negligible and within their design error. Perhaps you're thinking that it'll distribute the user-base across more nodes, but that's highly dependent on where those users are located.
I'd go with 3-120° sectors.
Andre, K6AH