Reflected Waves
When a wireless signal encounters an obstruction while traveling from Point A to Point B, two things normally happen:
Attenuation— In general, the shorter the wavelength of a signal, relative to the size of the obstruction, the more the signal is attenuated.
Reflection— The shorter the wavelength of the signal relative to the size of the obstruction, the more likely it is that some of the signal will be reflected off the obstruction.
The following sections describe two types of reflected waves. One of these two types occurs at microwave frequencies and is important to your understanding of microwave propagation. You might already be familiar with the first type of reflected waves: sky waves.
Sky Waves
The first type of reflected ...
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