Which one is better Three 9dbi sector Antennas or one 15 Dbi Omni Direct. ? for hotspot POP (point of presents base station )
Do you know any sector for good price at least 12 dbi i wan to use it with Mikrotik minipci card 25 dbi, that is the highest dbi wireless RBoard PCI card Mikrotik makes.
Ubunto make the 5.8 ghz but it is 5.8 with some trees and winter, tress, suburb area will not be adequate for the needs.
thx
Antenna selection depends on Area to cover. A 15db Omni has a very small vertical
angle. So it needs a flat coverage area to be useful.
9dBi is very low gain for a sector and 15dBi is very high gain for an Omni. Are you sure you don’t have those numbers reversed? What frequency are you looking at?
Tom
I want to put up antenna in my neigborhood, for hotspot, I want to have good coverage EIRR 36 dbi, omni can give me this but i can put only around 35 clients on it, but shorter range around 500 meter outdoor,
with 9 dbi sectors (around 65 USD each) will i get better range and performance? i will get 25 AP dbi+ 9 sect. Antenna= 34 dbi 
will this still be worthed to put up instead of 15 or 12 dbi omni.
Pls advice/
thx
The more radios and sector antennas you use, the more clients you can support so that is your biggest consideration when designing a site.
You need sector antennas with intermediate gain to get wide area coverage close to the base station. Wider vertical beamwidth required to provide coverage close to the base station.
The increased gain of the sector antennas also means that the operating range of an access point array can be double or more the range of a single access point with an omnidirectional antenna.