I am planning to use 2.4Ghz XBeePro 63mW Devices for a project that requires a coverage area of around 1.5-2km.
When i go to select an antenna there are various options like Circular,Virtical, Horizontal polarized etc.
Which antenna would give a coverage for a field? I cant have it directional (one point to another point). By devices will be moving around on a field.
What type of polarization is recommended for this kind of a setup? My Base XBee will be on a elevation of around 40m from the ground so i have a clear line of sight for all the moving modules.
There are going to be around 20-30moving modules streaming data at around 2-5readings per second.
A +12dBi Antenna should suffice the application? And what about polarization?