Extreme Networks Extreme Wireless Site Preparation And Installation Manual page 10

Table 4: Typical Antenna Height Requirements—2.4 GHz (continued)
Distance between Tx and
Rx antennas (km)
20
25
30
Table 5: Typical Antenna Height Requirements—5 GHz
Distance between Tx and
Rx antennas (km)
2
5
10
15
20
25
30
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
ExtremeWireless™ External Antenna with Wave 2
Fresnel Zone radius
(meters)
25
28
30.6
Fresnel Zone radius
(meters)
5.22
8.24
11.67
14.3
16.5
18.46
20.22
Earth curvature (meters)
7.77
12.14
17.48
Earth curvature (meters)
0.08
0.49
1.94
4.37
7.77
12.14
17.48
the following
AP Site Preparation
Minimum antenna height
requirements (meters)
32.77
40.14
48.08
Minimum antenna height
requirements (meters)
5.3
8.73
13.61
18.67
24.27
30.6
37.7
figure:
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