Agilent Technologies 8163A Manual page 194

Return Loss Measurement
194
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If we substitute equation 3 into equations 2 and 4, this gives us the
following two equations:
If we subtract P
para
equations:
If we divide equation 8 by equation 7, this gives us the following equations:
Thus we can use the equation below to calculate return loss:
The return loss of the reference reflection is given by:
A Background to Return Loss Measurement
M
P = c M R + --------------- - P
R ef 1 Ref R ef
M
para
M
P = c M R + --------------- - P
DUT 1 DUT DUT
M
from equations 5 and 6, this gives us the following
Agilent 8163A/B, 8164A/B & 8166A/B Mainframes, Sixth Edition
ref
(5)
p ara
DUT
(6)
para
para