User's Manual

DragonWave Inc. 48
AirPair 100 UL 24 GHz Product Manual
6.4. Clear Line of Sight
Caution
There can be no obstructions in the Fresnel zone. If there are
obstructions within this broad beam or Fresnel Zone, some
of the signal is diffracted off the obstruction, with an
accompanying phase shift.
The AirPair must have a clear line of sight. Use caution and make sure there is
proper Fresnel Zone clearance. The size of the beam grows as it propagates
towards the destination. The beam must have no obstructions in its path.
Obstructions within the path of the beam can decrease the signal quality by
diffracting the signal.
When you consider Fresnel Zone clearance, you must consider both the height
above and the lateral distance from obstructions Figure 6-9 show trees within the
Fresnel zone that obstruct the signal. Do not allow any obstruction of the Fresnel
Zone.