UNIT- 1 : MICROWAVE TRANSMISION LINES - LECTURE 5
STANDING WAVE RATIO:
In a lossless line, the amplitude of the forward (or backward) voltage remains constant as the wave propagates
along z, only with a shift in the phase angle. The superimposition of the forward wave and backward wave
results in a standing wave pattern.
In a standing wave, there are positions at the line where the amplitude of the resultant voltage has maximum
and minimum.
The voltage standing wave ratio (VSWR) is the ratio of the maximum and minimum voltage magnitudes. The
distance between two successive maximums is equal to λ/2.
VSWR is useful to find the maximum voltage magnitude on the line due to reflection from the load. If Vinc is
the incident voltage on the load,
PROBLEMS:
1.