User's Manual

AZALEA MSR2000 INSTALLATION GUIDE

4 Antenna Installation

4.1 Principles

z Height of antenna installation:

¾ The antennas height can be different even for antennas connected to same MSR2000. It would

be determined by the space of installation, or by design requirement;

¾ The antenna height for access could be 20 meters in open and flat area of city. It could be 30

meters in open area in rural flat area;

¾ Too high antenna installation will decrease the coverage capability close to antenna, it is much

popular when using omni antennas;

¾ Too high antenna installation will have another negative impact for system performance by

interference to sites in surrounding areas. Its signal strength will be seen by many other sites, which

is hard to avoid interference.

z Antenna azimuth:

¾ The main beam of antenna should point to the most dense traffic area to have better coverage

and link quality;

¾ The overlapping coverage between two neighboring site should be less than 10% of its total

coverage area in urban scenario;

¾ Overlapping area should not be too large in suburban and country area as well, and the angle of

two neighboring antenna main beam should not be less than 90 degree;

¾ To avoid over coverage of an antenna, the antenna main beam should not point to the center of

straight streets.

It should notice that the coverage capability changed if the azimuth of antenna adjusted, to improve

coverage in one direction will give negative impact to other direction. The proper azimuth is very

important in network building up stage.

z Antenna down-tilt angle desing:

¾ Down-tilt is widely used to have better coverage and less interference to neighboring sites;

¾ The down-tilt angle should be well designed, too high down-tilt will impact antenna beam form,

and have the negative impact of coverage;

¾ The design of down-tilt antenna angle should consider the output power, antenna height, target

coverage area, radio environment, etc. It should be done after site survey.