93
10.2 Sources of interference
In radio transmission, there are many sources of interference, that can reduce signal strength and thus reduce performance of
a datalink. Below is some information about the most common sources of interference, and how to avoid them.
Fresnel Zone
Contrary to intuition, radio waves travel not only directly, but also in an ellipsoidal pattern. This is visualized below. Mounting
antennas close to the ground can therefore reduce signal strength by partially blocking signal transmission. As a countermea-
sure, e.g. for achieving long distance, mounting the radio or antenna on a pole may increase signal strength.
Silvus Handling
9
10
To Next Page
Loading...