6
MGA-425P8 Typical Scattering Parameters (at 25°C, V
DS
= 2V, I
DS
= 20 mA)
Freq. S
11
S
21
S
12
S
22
MSG/MAG
GHz Mag. Ang. dB Mag. Ang. dB Mag. Ang. Mag. Ang.
0.1 0.806 -15.3 24.42 16.629 171.6 -30.46 0.030 80.3 0.657 -8.9 32.67
0.5 0.789 -59 22.96 14.066 147.5 -28.18 0.039 59.9 0.595 -37.6 25.57
0.9 0.799 -92.7 21.38 11.723 128.5 -24.58 0.059 43.4 0.502 -62.6 22.98
1 0.8 -99.5 20.95 11.156 124.4 -24.01 0.063 39.9 0.479 -68.2 22.48
1.5 0.814 -126.2 18.87 8.784 107.8 -22.62 0.074 26.1 0.389 -93.3 20.74
1.9 0.819 -141.1 17.34 7.365 97.5 -22.05 0.079 17.5 0.335 -110.1 19.70
2 0.823 -144.8 16.94 7.03 94.8 -22.05 0.079 15.7 0.328 -115.4 19.49
2.4 0.824 -155.7 15.56 5.999 86.7 -21.72 0.082 9.6 0.3 -129.4 18.64
3 0.828 -168.1 13.77 4.881 76.4 -21.62 0.083 2.1 0.279 -147.1 17.69
3.5 0.83 -176.3 12.50 4.216 69 -21.51 0.084 -2.8 0.268 -158 17.01
3.9 0.827 178.3 11.55 3.778 63.2 -21.51 0.084 -6.9 0.269 -164.9 16.53
4 0.84 176.9 11.23 3.643 63.2 -21.62 0.083 -6.3 0.272 -169.6 16.42
4.5 0.834 170.7 10.34 3.288 56.4 -21.51 0.084 -10.8 0.267 -175.5 15.93
5 0.837 164.9 9.48 2.977 50.6 -21.41 0.085 -14.2 0.266 177.8 15.44
5.1 0.837 163.8 9.33 2.926 49.4 -21.41 0.085 -15 0.265 176.6 15.37
5.2 0.836 162.7 9.17 2.875 48.2 -21.41 0.085 -15.7 0.263 175.7 15.29
5.3 0.836 161.7 9.01 2.821 46.9 -21.41 0.085 -16.5 0.264 175 15.21
5.4 0.835 160.6 8.86 2.772 45.7 -21.41 0.085 -17.2 0.265 173.8 15.13
5.5 0.836 159.6 8.70 2.723 44.5 -21.41 0.085 -18.1 0.264 172.6 15.06
5.6 0.836 158.6 8.56 2.679 43.2 -21.41 0.085 -18.9 0.262 171.6 14.99
5.7 0.837 157.5 8.40 2.631 42 -21.41 0.085 -19.8 0.263 170.9 14.91
5.8 0.836 156.4 8.25 2.584 40.6 -21.41 0.085 -20.7 0.264 170.1 14.83
6 0.842 155.3 7.82 2.461 38.2 -21.51 0.084 -22.3 0.268 168.9 14.67
7 0.846 144.7 6.40 2.09 27.5 -21.72 0.082 -28.8 0.281 158.9 14.06
8 0.838 134.4 5.23 1.827 16.3 -21.41 0.085 -34.4 0.283 145.7 13.32
9 0.842 123.3 4.30 1.641 6 -21.83 0.081 -42.6 0.322 132.3 13.07
10 0.846 112.6 3.30 1.462 -6.9 -21.62 0.083 -49.9 0.366 115.3 12.46
11 0.857 102.3 2.03 1.264 -17.6 -22.50 0.075 -56.5 0.391 102.3 9.68
12 0.87 92.5 1.10 1.135 -28.5 -22.62 0.074 -63.9 0.44 96.1 9.62
13 0.883 84 0.01 1.001 -39.5 -23.10 0.07 -70.6 0.482 89.3 9.26
14 0.885 76.3 -1.15 0.876 -49.5 -23.61 0.066 -77.1 0.512 84.8 8.08
15 0.893 69.3 -2.24 0.773 -58.2 -24.44 0.06 -82.5 0.534 81.7 7.30
16 0.881 61 -3.19 0.693 -67.2 -24.73 0.058 -87.6 0.56 77.5 5.78
17 0.87 53.2 -4.19 0.617 -75.9 -25.04 0.056 -91.7 0.583 72.1 4.36
18 0.884 45.1 -5.32 0.542 -85.1 -26.74 0.046 -94.9 0.608 63.5 3.72
Freq F
min
Γ
opt
Γ
opt
R
n/50
NF @
GHz dB Mag. Ang.
50 dB
0.9 0.9 0.09 -123.9 0.08 0.91
1.5 0.99 0.2 170.4 0.08 1.02
1.9 1.04 0.25 166.7 0.07 1.13
2 1.06 0.25 168.1 0.07 1.16
2.4 1.12 0.27 170.1 0.07 1.28
3 1.2 0.33 173.4 0.06 1.45
3.5 1.27 0.38 178 0.06 1.6
3.9 1.33 0.41 -179.5 0.06 1.71
4.5 1.41 0.45 -174.8 0.06 1.87
5 1.49 0.47 -171.6 0.06 2.04
5.2 1.51 0.48 -170.3 0.06 2.09
5.5 1.56 0.49 -167.3 0.06 2.18
5.8 1.6 0.51 -165 0.06 2.27
6 1.63 0.52 -163.4 0.06 2.33
7 1.77 0.54 -154.5 0.09 2.62
8 1.91 0.56 -143.5 0.14 2.95
9 2.05 0.58 -131.6 0.24 3.18
10 2.16 0.61 -120.2 0.32 3.56
Note:
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.
Typical Noise Parameters, V
DS
= 2V, I
DS
= 20 mA
Figure 17. MSG/MAG & |S21|
2
vs.
Frequency at 2V, 20 mA.
MSG/MAG & |S21|
2
(dB)
40
30
20
10
0
-10
FREQUENCY (GHz)
0 105 15 20
MAG
MSG
S21
