11
Notes:
1. S parameter is 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-50189 Typical Scattering Parameters at 25°C, VDS = 4.5V, IDS = 280 mA
Freq. S11 S21 S12 S22
MSG/MAG
GHz Mag. Ang. dB Mag. Ang. dB Mag. Ang. Mag. Ang. dB
0.1 0.923 -133.2 31.0 35.531 110.9 -37.7 0.013 31.7 0.692 -163.7 34.4
0.2 0.919 -158.7 25.6 19.023 97.1 -37.1 0.014 25.2 0.738 -173.2 31.3
0.3 0.919 -169.4 22.2 12.872 90.4 -36.5 0.015 24.9 0.749 -177.6 29.3
0.4 0.917 -176.1 19.7 9.705 85.7 -35.9 0.016 26.3 0.752 179.3 27.8
0.5 0.916 178.5 17.7 7.687 84.4 -35.4 0.017 30.4 0.756 175.7 26.6
0.6 0.916 174.5 16.2 6.438 81.7 -34.9 0.018 32.6 0.755 173.5 25.5
0.7 0.917 170.9 14.9 5.582 79.2 -34.4 0.019 34.5 0.755 171.4 24.7
0.8 0.918 167.5 13.9 4.939 76.5 -33.6 0.021 35.9 0.753 169.4 23.7
0.9 0.920 164.1 12.9 4.433 73.8 -33.2 0.022 36.8 0.755 167.5 23.0
1.0 0.921 161.0 12.1 4.026 70.9 -32.4 0.024 37.1 0.753 165.6 22.2
1.1 0.922 159.6 11.7 3.853 69.5 -32.0 0.025 37.1 0.753 164.7 21.9
1.2 0.922 158.1 11.3 3.679 68.1 -32.0 0.025 37.1 0.753 163.7 21.7
1.3 0.922 155.4 10.6 3.378 65.2 -31.4 0.027 36.7 0.751 162.0 21.0
1.4 0.919 152.6 9.9 3.127 62.3 -31.1 0.028 36.3 0.753 160.2 20.3
1.5 0.918 150.2 9.3 2.910 59.6 -30.5 0.030 35.8 0.753 158.4 19.2
1.6 0.920 147.5 8.7 2.717 56.7 -30.2 0.031 35.0 0.753 156.7 18.5
1.7 0.919 144.6 8.1 2.547 53.9 -29.6 0.033 34.1 0.753 154.9 17.8
1.8 0.920 142.0 7.6 2.392 51.2 -29.4 0.034 33.2 0.753 153.3 17.2
1.9 0.918 139.6 7.0 2.251 48.6 -29.1 0.035 32.1 0.752 151.7 16.5
2.0 0.919 137.1 6.5 2.123 45.9 -28.6 0.037 31.0 0.752 150.1 16.0
2.1 0.917 134.6 6.1 2.009 43.3 -28.4 0.038 29.7 0.752 148.3 15.4
2.2 0.918 132.0 5.6 1.908 40.6 -28.2 0.039 28.6 0.752 146.8 15.0
2.3 0.915 129.8 5.1 1.800 37.9 -28.0 0.040 27.4 0.755 145.2 14.4
2.4 0.912 127.1 4.7 1.721 35.6 -27.7 0.041 26.0 0.750 143.9 13.9
2.5 0.908 124.9 4.3 1.647 33.4 -27.3 0.043 25.0 0.768 142.3 13.4
3 0.908 112.7 2.3 1.304 21.1 -26.6 0.047 18.3 0.766 135.5 11.5
3.5 0.912 99.5 0.5 1.062 11.3 -26.0 0.050 12.6 0.773 131.8 10.0
4 0.923 92.6 -0.7 0.921 1.5 -25.8 0.051 7.1 0.779 123.3 9.4
5 0.922 78.2 -3.5 0.669 -19.8 -25.2 0.055 -5.3 0.793 102.9 7.0
6 0.921 61.3 -5.8 0.515 -41.5 -25.7 0.052 -22.4 0.806 84.7 5.2
7 0.921 41.2 -8.2 0.389 -59.6 -26.0 0.050 -39.5 0.809 69.9 3.2
8 0.922 24.3 -10.2 0.308 -79.9 -26.7 0.046 -55.9 0.844 54.6 2.1
9 0.923 11.8 -12.4 0.239 -100.5 -28.4 0.038 -73.5 0.882 37.0 1.4
10 0.922 10.8 -14.6 0.187 -109.4 -31.1 0.028 -81.6 0.896 27.1 0.1
11 0.921 0.3 -16.0 0.158 -124.9 -34.4 0.019 -108.3 0.872 20.3 -1.8
12 0.924 -8.0 -17.7 0.131 -138.0 -46.0 0.005 -147.3 0.916 7.0 -1.3
13 0.923 -12.1 -19.2 0.110 -153.4 -40.0 0.010 71.0 0.877 -1.1 -4.4
14 0.922 -20.6 -21.0 0.089 -168.9 -37.1 0.014 30.2 0.882 -7.5 -6.3
15 0.925 -23.6 -21.4 0.085 177.8 -39.2 0.011 -4.9 0.865 -19.2 -7.2
16 0.925 -23.1 -21.1 0.088 165.9 -37.7 0.013 -8.8 0.864 -26.2 -6.9
17 0.924 -24.3 -18.9 0.114 155.2 -41.9 0.008 -173.5 0.856 -33.6 -4.7
18 0.924 -32.5 -17.1 0.140 133.4 -35.4 0.017 161.7 0.835 -42.5 -3.2
Figure 31. MSG/MAG & |S21|
2
vs Frequency
at 4.5V/280 mA.
FREQUENCY (GHz)
MSG/MAG & |S21|
2
(dB)
0182 4 6 8 10 12 14 16
40
30
20
10
0
-10
-20
-30
MSG
MAG
S21