User's Manual

AxxceLTE eNodeB

Installation Guide v1.0 - 18 -

7 Antenna Downtilt

To maximize receive signal levels in the intended coverage area, the downtilt angle

should be calculated before the antenna is mounted. This only applies to directional

antennas at the Cell Site. Omni directional antennas should be mounted perpendicular to

the ground. The antenna tilt angle should be determined based on desired coverage area

and any propagation constraints that were determined during RF planning.

Axxcelera has provided a spreadsheet that will calculate the inner and out cell radius

based on antenna height, antenna pattern, and degrees of downtilt. It is important to

understand that this spreadsheet only calculates the 3dB points of the antenna coverage.

Consult the antenna pattern to determine exact coverage at given offsets outside the 3dB

points.

FIGURE 7.1 – CELL SITE ANTENNA DOWNTILT

FIGURE 7.2 – ANTENNA DOWNTILT SPREADSHEET