Agilent Technologies N4413A, User Manual

Page: 83 / 234

Using the Multiport Test System
How to Measure Simultaneous Conjugate Match of a Differential 2-Port Device
Chapter 3 73
Note the formula for differential input match:
DIM = (CONJ(C1)/ABS(C1))*(B1/(2*ABS(C1))-((B1^2/(ABS(2*C1))^2)-1)^0.5)
This translates to:
where:
and where:
Note the formula for differential output match:
DOM = (CONJ(C2)/ABS(C2))*(B2/(2*ABS(C2))-((B2^2/(ABS(2*C2))^2)-1)^0.5)
This translates to:
where:
and where:
Γ
GM
C
1
C
1
---------
B
1
2 C
1
------------
B
1
2
2 C
1
2
---------------
1 – – =
C
1
S
D D 11
S
DD 22
– =
B
1
1 S
DD 22
2
– S
DD 11
2
D
2
– + =
Γ
G M
C
2
C
2
---------
B
2
2 C
2
------------
B
2
2
2 C
2
2
--------------- 1 – – =
C
2
S
DD 22
S
DD 11
– =
B
2
1 S
DD 11
2
– S
DD 22
2
D
2
– + =