Transfer along a line To find the input impedance of a line of length l and characteristic impedance Z0 terminated
in a load impedance ZL, we normalise ZL with respect to Z0 to obtain zL, enter
the Smith Chart at zL, move clockwise by an amount 2βl radians, and read off the nor malised input impedance zin at the point resulting. The unnormalized input impedance
is Zin = Z0zin.
To make such operations simple, the Smith Chart has a peripheral scale graduated in
λ, thus avoiding the need for conversion of line lengths to radians. Note that movement
of only half a wave length along a line corresponds to movement of one full revolution
around the chart.
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