Welcome brother
U firstly need to be know that R|F antenna is designed to cover largest area of MS which measure the quality of service in this area.
To achieve that you need to adjust antenna tilt.
2 types of antenna tilt and the difference as below
| Electrical Tilt | Mechanical Tilt |
Electrical tilt decreases both length and width, like a circle on the
ground which is getting smaller and smaller, but stays a circle | Mechanical tilt will decrease coverage lengthwise from the sector, but
in width, the coverage will stay the same, more like an ellipse shape
type coverage on the ground |
| Recommended for sites which are not tall and inside city limits. | Mechanical tilt is used on tall sites, typically on top of hills, because electrical tilt is not enough. |
| Decrease coverage and does not increase overlap in sectors | Decrease coverage and Does not add Interference as in case of Electrical tilts |
Increases interference, as portion of energy based on electrical tilts
is transmitted in the upper side lobe reducing the energy in lobe facing
towards ground hence reducing coverage. | Sector overlaps are increased |
| Electrical tilt does not induce increase of back lobe | Mechanical tilt will lift up the back lobe of the antenna, so go easy with mechanical tilt. |
add that threre are what is called RET wich adjust antenna tilt remotly .
Finally be informed that all of both values of antenna tilt depend on RF anteanna planning data sheet
thx
