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•
Be sure there is enough clearance from buildings and that no
building construction may eventually block the path.
•
Check the topology of the land between the antennas using
topographical maps, aerial photos, or even satellite image
data (software packages are available that may include this
information for your area).
•
Avoid a path that may incur temporary blockage due to the
movement of cars, trains, or aircraft.
Antenna Height
A reliable wireless link is usually best achieved by mounting the
antennas at each end high enough for a clear radio line of sight
between them. The minimum height required depends on the
distance of the link, obstacles that may be in the path, topology of
the terrain, and the curvature of the earth (for links over 3 miles).
For long-distance links, a mast or pole may need to be
contsructed to attain the minimum required height. Use the
following table to estimate the required minimum clearance above
the ground or path obstruction (for 5 GHz bridge links).
Radio Path Planning
3-3
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