Understanding Phase
RF signals are very dependent upon timing because they are always in motion. By their very nature, the signals are made up of electric and magnetic forces that vary over time. The phase of a signal is a measure of shift in time relative to the start of a cycle. Phase is normally measured in degrees, where 0 degrees is at the start of a cycle, and one complete cycle equals 360 degrees. A point that is halfway along the cycle is at the 180-degree mark. Because an oscillating signal is cyclic, you can think of the phase traveling around a circle again and again.
When two identical signals are produced at exactly the same time, their cycles match up and they are said to be in phase with each other. If one signal is delayed from ...
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