9
Notes:
1. Fmin values at 2 GHz and higher are based on measurements while the Fmin below 2 GHz have been extrapolated. The Fmin values are based on
a set of 16 noise gure measurements made at 16 di erent impedances using an ATN NP5 test system. From these measurements a true Fmin
is calculated. Refer to the noise parameter application section for more information.
2. S and noise parameters are measured on a microstrip line made on 0.025 inch thick alumina carrier. The input reference plane is at the end of
the gate lead. The output reference plane is at the end of the drain lead.
ATF-53189 Typical Scattering and Noise Parameters at 25°C, VDS = 4.0V, IDS = 180 mA
Freq. S11 S21 S12 S22
MSG/MAG
GHz Mag. Ang. dB Mag. Ang. dB Mag. Ang. Mag. Ang. dB
0.1 0.544 -133.2 31.0 35.531 110.9 -37.7 0.013 31.7 0.692 -163.7 34.4
0.2 0.704 -158.7 25.6 19.023 97.1 -37.1 0.014 25.2 0.738 -173.2 31.3
0.3 0.777 -169.4 22.2 12.872 90.4 -36.5 0.015 24.9 0.749 -177.6 29.3
0.4 0.813 -176.1 19.7 9.705 85.7 -35.9 0.016 26.3 0.752 179.3 27.8
0.5 0.856 178.5 17.7 7.687 84.4 -35.4 0.017 30.4 0.756 175.7 26.6
0.6 0.866 174.5 16.2 6.438 81.7 -34.9 0.018 32.6 0.755 173.5 25.5
0.7 0.872 170.9 14.9 5.582 79.2 -34.4 0.019 34.5 0.755 171.4 24.7
0.8 0.874 167.5 13.9 4.939 76.5 -33.6 0.021 35.9 0.753 169.4 23.7
0.9 0.876 164.1 12.9 4.433 73.8 -33.2 0.022 36.8 0.755 167.5 23.0
1.0 0.880 161.0 12.1 4.026 70.9 -32.4 0.024 37.1 0.753 165.6 22.2
1.5 0.881 150.2 9.3 2.910 59.6 -30.5 0.030 35.8 0.753 158.4 19.2
2.0 0.882 137.1 6.5 2.123 45.9 -28.6 0.037 31.0 0.752 150.1 16.0
2.5 0.879 124.9 4.3 1.647 33.4 -27.3 0.043 25.0 0.768 142.3 13.4
3.0 0.874 112.7 2.3 1.304 21.1 -26.6 0.047 18.3 0.766 135.5 11.5
3.5 0.882 99.5 0.5 1.062 11.3 -26.0 0.050 12.6 0.773 131.8 10.0
4.0 0.889 92.6 -0.7 0.921 1.5 -25.8 0.051 7.1 0.779 123.3 9.4
5.0 0.903 78.2 -3.5 0.669 -19.8 -25.2 0.055 -5.3 0.793 102.9 7.0
6.0 0.918 61.3 -5.8 0.515 -41.5 -25.7 0.052 -22.4 0.806 84.7 5.2
7.0 0.948 41.2 -8.2 0.389 -59.6 -26.0 0.050 -39.5 0.809 69.9 3.2
8.0 0.960 24.3 -10.2 0.308 -79.9 -26.7 0.046 -55.9 0.844 54.6 2.1
9.0 0.941 11.8 -12.4 0.239 -100.5 -28.4 0.038 -73.5 0.882 37.0 1.4
10.0 0.946 10.8 -14.6 0.187 -109.4 -31.1 0.028 -81.6 0.896 27.1 0.1
11.0 0.937 0.3 -16.0 0.158 -124.9 -34.4 0.019 -108.3 0.872 20.3 -1.8
12.0 0.914 -8.0 -17.7 0.131 -138.0 -46.0 0.005 -147.3 0.916 7.0 -1.3
13.0 0.951 -12.1 -19.2 0.110 -153.4 -40.0 0.010 71.0 0.877 -1.1 -4.4
14.0 0.948 -20.6 -21.0 0.089 -168.9 -37.1 0.014 30.2 0.882 -7.5 -6.3
15.0 0.939 -23.6 -21.4 0.085 177.8 -39.2 0.011 -4.9 0.865 -19.2 -7.2
16.0 0.948 -23.1 -21.1 0.088 165.9 -37.7 0.013 -8.8 0.864 -26.2 -6.9
17.0 0.947 -24.3 -18.9 0.114 155.2 -41.9 0.008 -173.5 0.856 -33.6 -4.7
18.0 0.903 -32.5 -17.1 0.140 133.4 -35.4 0.017 161.7 0.835 -42.5 -3.2
Figure 36. MSG/MAG & |S21|2 vs. and
Frequency at 4.0V/180 mA.
FREQUENCY (GHz)
MSG/MAG & |S21|
2
(dB)
0182 4 6 8 10 12 14 16
40
30
20
10
0
-10
-20
MSG
MAG
S21
Freq
GHz
Fmin
dB
Gamma Opt Rn/50 Ga
dB
Mag Ang
0.5
0.9
1.0
1.5
2.0
2.4
3.0
3.5
5.0
5.8
6.0
7.0
8.0
9.0
10.0
0.65
0.76
0.79
0.86
0.94
1.00
1.10
1.17
1.41
1.53
1.56
1.72
1.87
2.03
2.18
0.394
0.417
0.423
0.465
0.509
0.545
0.600
0.645
0.777
0.840
0.855
0.920
0.970
0.993
0.997
163.6
172.4
175.3
-165.4
-147.7
-134.6
-116.7
-103.3
-70.0
-56.1
-52.9
-39.0
-27.5
-19.1
-7.5
0.11
0.09
0.08
0.08
0.06
0.08
0.16
0.28
0.35
0.41
0.42
0.51
0.97
1.88
2.54
25.82
21.83
21.71
18.70
17.63
16.45
14.90
13.53
11.35
10.31
10.38
9.79
7.91
6.11
4.56