User's Manual

Chapter 2 - Hardware Description Installation Preparations
Alvarion BreezeNET B300 13 Technical User Manual
2.3 Installation Preparations
2.3.1 Required Components and Accessories
Before the installation, please make sure you have all necessary parts and
accessories:
 Device
 Antenna
 Low loss antenna cable for the required frequency range
 Antenna pole (if necessary)
 Required grounding system
 Accessories and tools
2.3.2 Antenna Placement
When planning an antenna placement for PTP link, in order to obtain the maximal
coverage range and best performance for the Device, one need to consider that
LOS requirements must be fulfilled for the path between two antennas. Moreover,
it is of vital importance that the certain zone that surrounds the signal
propagation path must be free from obstructions. One should understand that the
radio beam is not as thin as, for example, laser beam. Radio beam, also called as
a 1st Fresnel zone, has a profile of a rugby ball. Its exact form and size depend
upon the frequency and the signal propagation path length.
If most of the 1st Fresnel zone is obstructed, a major part of a electromagnetic
energy will be lost which leads to a severe signal quality degradation and, as a
result, to coverage range decreasing.
Below is an incomplete list of possible obstructions on the signal propagation
path:
 Neighboring buildings
 Trees
 Bridges