Keysight V3500A, Руководство пользователя

Страница: 110 / 122

90 V3500A User’s Guide
4 RF Measurement Basics
Figure 4-4 Mismatch in power measurements
The reflection coefficient of a device (
Γ
g
) is a measure of its
impedance relative to Z
0
( Z
0
is the characteristic impedance
of the system).
The reflection coefficient of the source (
Γ
g
) is defined as:
Similarly, the reflection coefficient (
Γ
l
) of the load is
defined as:
V
g
Z
g
Z
l
Signal
source
Load
Γ
g
Z
g
Z
0
–
Z
g
Z
0
+
------------------
=
Γ
l
Z
l
Z
0
–
Z
l
Z
0
+
-----------------
=