
80 MICROWAVE TRANSMISSION LINES
(c) From load and line characteristic impedance:
Zt. > Zo"
VSWR= Zr
Zo
ZL < Zo"
VSWR=
Zo
ZL
(d) From incident (P~) and reflected
(Pr)
power:
VSWR =
l + ~/Pr l Pi
1-4P,./P~
(e) From reflection coefficient (P):
I+P
VSWR =
1-P
(f) Reflection coefficient (P) from knowledge of VSWR:
p ~.
VSWR- 1
VSWR + 1