![]() ![]() Typical scatterers are lamp posts, street signs and foliage. Scattering occurs when a radio wave hits either a rough surface or a surface with dimensions of a wavelength or less, causing reflected energy to scatter. Reflection occurs when a radio wave hits a smooth surface that is much greater than a wavelength and effectively bounces off.ĭiffraction (or shadowing) occurs when the path between the transmitter and receiver is blocked by a dense object that is much greater than a wavelength, forming secondary waves behind the obstruction. However, before we start, explanations of a few symbols and terms we’ll be using:ġ. Here we look at nine key channel properties that it is important to understand. This is the channel, the medium over which we propagate the signal from the transmitter to the receiver. ![]() In a radio system, there may be large distances (including hills, forests, buildings etc) between the transmit and the receive antennas. Tait Principal Engineer Ian Graham continues his radio theory series with examples of channel properties that are critical to overall RF system design. Successful system design is heavily dependent on the designer’s understanding of the channel and its properties. ![]()
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