___________________________________________________ Principles of Transmission Lines
Figure 3-31. Sending-End Impedance of Various Lengths and Terminations
3-122. At all even numbered quarter-wavelength points from the short
applied to the line is varied, the impedance at these points increases just as
the impedance of a series-resonant circuit varies when the frequency applied
to it is changed. The same is true for an open-ended line (figure 3-31, view B),
except that the points of high and low impedance are reversed.
3-123. At this point let us review some of the characteristics of resonant
circuits so we can see how resonant line sections may be used in place of LC
circuits.
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