ATF-55143 Datasheet, PDF (17/20 Pages) AVAGO TECHNOLOGIES LIMITED – Low Noise Enhancement Mode Pseudomorphic HEMT

Designing with S and Noise Parameters and the Non-Lin-
ear Model
The non-linear model describing the ATF-55143 in-
cludes both the die and associated package model.
The package model includes the effect of the pins but
does not include the effect of the additional source
inductance associated with grounding the source leads
through the printed circuit board. The device S and
Noise Parameters do include the effect of 0.020 inch
thickness printed circuit board vias. When comparing
simulation results between the measured S parameters
and the simulated non-linear model, be sure to include
the effect of the printed circuit board to get an accurate
comparison. This is shown schematically in Figure 35.
For Further Information
The information presented here is an introduction to the
use of the ATF-55143 enhancement mode PHEMT. More
detailed application circuit information is available from
Avago Technologies. Consult the web page or your local
Avago Technologies sales representative.
VIA2
V1
D=20.0 mil
H=25.0 mil
T=0.15 mil
Rho=1.0
W=40.0 mil
DRAIN
ATF-55143
SOURCE
VIA2
V3
D=20.0 mil
H=25.0 mil
T=0.15 mil
Rho=1.0
W=40.0 mil
VIA2
V2
D=20.0 mil
H=25.0 mil
T=0.15 mil
Rho=1.0
W=40.0 mil
SOURCE
GATE
VIA2
V4
D=20.0 mil
H=25.0 mil
T=0.15 mil
Rho=1.0
W=40.0 mil
MSub
MSUB
MSub1
H=25.0 mil
Er=9.6
Mur=1
Cond=1.0E+50
Hu=3.9e+034 mil
T=0.15 mil
TanD=0
Rough=0 mil
Figure 35. Adding Vias to the ATF-55143 Non-Linear Model for Comparison to Measured S and Noise Parameters.
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