
128 THE SMITH CHART
= (20) log (2.7) (6-48)
= (20) (0.431) = 8.3 dB
(6-49)
The transmission loss coefficient is found in a manner similar to the VSWR, using
the radially scaled parameter scales. In practice, once we have found the VSWR
we need only drop a perpendicular line from the 2.6:1 VSWR line across the other
scales. In this case, the line intersects the voltage reflection coefficient at 0.44. The
power reflection coefficient (Pp~r) is found from the scale above and is equal to p2.
The perpendicular line intersects the power reflection coefficient line at 0.20.
The angle of reflection coefficient is found from the outer circles ...