Keysight V3500A User Manual page 111

V3500A User's Guide
If the source or load impedance is exactly equal to Z
corresponding reflection coefficient is zero. For simplicity,
let's assume V is defined as:
g
With V defined as in the above equation — the source will
g
deliver one watt to a load of impedance Z
delivered to the actual load is then defined by:
Into a perfect load of impedance Z
the load is:
The mismatch error in the power measurement, then, is the
ratio between P
load, Z0
load presented by the power meter is defined by:
P
load meter
--------------------------- -
P
RF Measurement Basics
Z + Z
g 0
----------------- - Z
V =
g 0
Z
0
Γ
1 – 2
l
------------------------- -
P =
load
2
1 Γ Γ
–
g l
, the power delivered to
0
P = 1
,
load Z
0
, and the power delivered to the actual
Γ
1 –
,
meter
------------------------------------ -
=
1 Γ Γ
–
,
load Z
0 g meter
4
, the
0
. The power
0
2
2
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