Howtosignalprocessing
- Which zone of Fresnel has strongest?
- What is the length of the Fresnel zone?
- How much of the Fresnel zone must be kept obstruction free?
Which zone of Fresnel has strongest?
The Fresnel zone is a 3-D cylindrical ellipse shape (like a cigar or sausage) and is made up of multiple zones, Zone 1 being the strongest area for signal strength, Zone 2 being the weaker, Zone 3 being weaker still and so on.
What is the length of the Fresnel zone?
The Fresnel zone is defined such that length of the line from one antenna to the surface and thence to the other antenna is λ/2 longer than the direct path.
How much of the Fresnel zone must be kept obstruction free?
Best practice is to maintain at least 60% of the first Fresnel zone radius free of obstructions to avoid fading of the received signal. When an obstacle in the path of propagation blocks the direct LOS path, the results can be catastrophic.
