Site Preparation Guide
Required Data for Antenna Installation Company
The Fresnel Zone
You need a clear
NOTE |
A wireless outdoor antenna installation that lacks sufficient clearance will suffer from poor performance. When radio performance is poor, the network response is poor as well, due to many retransmission attempts of lost data frames.
The shape of the radio beam, also defined as the Fresnel Zone, is bulged in the middle. The exact shape and width of the Fresnel Zone is determined by the path length and frequency of the radio signal.
If any significant part of the Fresnel Zone is obstructed, a portion of radio energy is lost, resulting in reduced performance. For optimal performance, you must ensure that the antenna products you choose, in combination with the height of the antenna installation above ground, will provide sufficient clearance to allow your antenna installation to cover the distance between the two wireless sites.
As shown in Figure 4, there are two major variables that determine the shape of the Fresnel Zone:
∙The distance between the antennas (1).
∙The minimum clearance required for optimal performance (2).
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