User manual

MIMO 2x2 Wireless Outdoor Access Point System User Manual
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7.2.1 Antenna Height
The reliable wireless link usually depends on the both sides antennas for a clear radio line of sight. The
minimum height is determined by the link distance, obstacles that may be in the path, topology of the
terrain, and the curvature of the earth (for links over 2 miles). For the long distance links, the mast or the
pole may need to be constructed to attain the minimum required height. The following table is for you to
estimate the required minimum clearance above the ground or path obstruction.
Figure 30. Antenna height
For example, the wireless link between the building A and the building B is located three miles (4.8 km)
away. There is a tree-covered hill in middle. From the table above, it can be seen that for a three-mile
link and the object clearance required at the mid-point is 5.4 m (17.6 ft). The tree-covered hill height