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Site Preparation 1-5
Determining the Antenna Locations
Figure 1-1: Fresnel Zone and Line of Sight Clearance
If a significant part of the Fresnel Zone is obstructed, a portion of radio energy is lost,
resulting in reduced performance. For optimal performance, ensure that the antenna
products you choose, in combination with the height of the antenna installation above
ground, provide sufficient clearance to allow your antenna installation to cover the distance
between the two sites.
Obstacles within the line of sight can significantly reduce the distance and performance.
Obstructions include neighboring buildings, trees, and power lines as shown in Figure 1-2.
Total Distance
Radius