TC 9-64 _________________________________________________________________________
3-112. The composite diagram in figure 3-29 shows all resultant curves on a
full-wavelength section of line over a complete cycle. Notice that the amplitude
of the voltage varies between zero and maximum in both directions at the
center and at both ends as well, but one-fourth of the distance from each end
the voltage is always zero. The resultant waveshape is referred to as a standing
wave of voltage. Standing waves, then, are caused by reflections, which occur
only when the line is not terminated in its characteristic impedance.
Figure 3-29. Composite Results of Instantaneous Waves
3-36
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