Reducing the power output of MacroBTSs may involve a lot of changing parameters like Handover margin and Power Budget. Which may cause instability if not changed carefull so what is your recommendation. There are two options:
1) Take low gain antennas with high aperature.
2)Take high gain antennas with low aperature then decrease the power output.
“But this is fixed ! you cannot change the gain of an antenna by yourself. I you reduce the BTS power, you don’t reduce the gain of the antenna. The antenna gain will still be xx dBi, and the aperture will still be 55°.”
but if this is fixed why do antenna vendors still manufacture low gain GSM antennas. Sorry I have some doubts about it.