3-42
as an inductance from 1/4 to 1/2 wavelength, as a capacitance from 1/2 to 3/4 wavelength, and as an
inductance from 3/4 to 1 wavelength, etc. A number of open transmission lines, with their equivalent
circuits, are shown in the illustration.
Impedance of Various Lengths of Shorted Lines
Follow figure 3-33 as we study the shorted line. At the odd quarter-wavelength points, the voltage is
high, the current is low, and the impedance is high. Since these conditions are similar to those found in a
parallel-resonant circuit, the shorted transmission line acts as a parallel-resonant circuit at these lengths.
Figure 3-33.—Voltage, current, and impedance on shorted line.
