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Near Field Obstructions in Mesh Networks

(3 votes)

Written by Jim Geier

Monday, 02 April 2007

When deploying outdoor wireless mesh solutions, we've found that obstructions close to the mesh router antennas will significantly impact the propagation or radio waves. For example, trees and edges of buildings within about 20 feet of the antenna can degrade range by as much as 50 percent. So, be careful when planning the installation location of mesh routers!

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Near Field Obstructions

jonassono (Registered) 2007-07-09 12:37:27

This would be consistent with the rule of thumb related to Fresnel Zone theory which suggests that "no more than 40% of the zone at any point in the path should be obstructed". Plainly, for any given obstruction, the closer it is to the antenna, where the Fresnel zone is narrower in diameter greater the impact or interterence with radio wave propagation.

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