VMMK-1225 Datasheet, PDF (10/13 Pages) AVAGO TECHNOLOGIES LIMITED – 0.5 to 26 GHz Low Noise E-PHEMT in a Wafer Scale Package

S Parameter Measurements
The S-parameters are measured on a .016 inch thick RO4003 printed circuit test board, using G-S-G (ground signal
ground) probes. Coplanar waveguide is used to provide a smooth transition from the probes to the device under test.
The presence of the ground plane on top of the test board results in excellent grounding at the device under test. A
combination of SOLT (Short - Open - Load - Thru) and TRL (Thru - Reflect - Line) calibration techniques are used to correct
for the effects of the test board, resulting in accurate device S-parameters. The reference plane for the S Parameters is
at the edge of the package.
VMMK-1225 ADS Model
CAP
ID=C6
C=Cpgd pF
PORT
P=1
Z=50 Ohm
IND
ID=L1
L=Lg nH
CAP
ID=C3
C=Cpgs pF
RES
ID=R3
R=Rg Ohm
CAP
ID=C1
C=Cgs pF
CAP
ID=C4
C=Cgd pF
1
3
RES
ID=R1
R=Rgs Ohm
2
4
VCCS
ID=U1
M=Gm S
A=0 Deg
R1=1e100 Ohm
R2=Rds Ohm
F=0 GHz
T=tau ns
RES
ID=R4
R=Rs Ohm
RES
ID=R2
R=Rd Ohm
IND
ID=L2
L=Ld nH
PORT
P=2
Z=50 Ohm
CAP
ID=C2
C=Cds pF
CAP
ID=C5
C=Cpds pF
Rg
Rg
Rd
RsG
C pgs
C pds
C pgd
Ls
Lg
Ld
10
Value
4.532
1.9
1.72
0.0475
0.0392
0.003935
0.000303
0.3492
0.2772
IND
ID=L3
L=Ls nH
PORT
P=3
Z=50 Ohm