Agilent Technologies E4445A PSA Series, Руководство пользователя, Страница: 34 / 74

34 Chapter 2
Measurement Concepts
Equations and Conversion Table
M
e
a
s
ure
m
en
t Conc
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Equations and Conversion Table
Figure 2-1 Transmitted and Reflected Power with a DUT
Reflection coefficient is actually a complex quantity (
Γ
). But a tracking
source/spectrum analyzer system only makes scalar measurements (
ρ
).
stimresp.vsd
Device Under Test
(DUT)
Incident Transmitted
Reflected
Insertion Loss or Gain 20log
V
transmitted
V
incident
------------------------
=
Reflection Coefficient
ρ
V
reflected
V
incident
-------------------- =
Return Loss 20 – log
ρ
=