6
ATF-58143 Typical Scattering Parameters, VDS = 3V, IDS = 30 mA
Freq. S11 S21 S12 S22
MSG/MAG
GHz Mag. Ang. dB Mag. Ang. dB Mag. Ang. Mag. Ang. dB
0.1 0.98 -17.1 27.29 23.14 168.7 -40.10 0.010 80.8 0.67 -12.1 33.69
0.5 0.81 -92.0 25.25 18.31 123.7 -28.10 0.039 45.7 0.42 -46.6 26.68
0.9 0.75 -126.4 21.87 12.40 103.4 -26.12 0.049 34.8 0.32 -66.7 23.99
1.0 0.73 -132.2 21.18 11.46 99.8 -25.87 0.051 33.4 0.31 -72.3 23.52
1.5 0.69 -153.2 18.38 8.31 85.1 -24.70 0.058 29.4 0.25 -90.8 21.54
1.9 0.66 -165.9 16.74 6.88 75.4 -23.86 0.064 27.4 0.23 -103.6 20.30
2.0 0.65 -169.3 16.40 6.61 73.1 -23.65 0.066 26.9 0.22 -106.0 20.03
2.5 0.63 176.3 14.83 5.51 61.9 -22.71 0.073 24.4 0.19 -118.1 18.77
3.0 0.61 160.7 13.51 4.74 50.9 -21.87 0.081 21.1 0.17 -133.3 17.69
3.5 0.61 147.4 12.35 4.15 40.4 -21.10 0.088 17.7 0.15 -145.4 16.73
4.0 0.62 133.8 11.28 3.66 30.2 -20.45 0.095 13.5 0.13 -155.7 15.86
4.5 0.64 123.7 10.32 3.28 20.5 -19.86 0.102 9.3 0.13 -175.4 15.09
5.0 0.66 112.5 9.41 2.96 11.1 -19.39 0.107 4.9 0.13 166.2 14.40
5.5 0.68 103.7 8.61 2.70 2.1 -18.87 0.114 0.7 0.14 152.8 13.74
6.0 0.69 93.0 7.84 2.47 -7.3 -18.44 0.120 -4.4 0.14 140.7 13.14
7.0 0.71 77.2 6.47 2.11 -24.8 -17.63 0.131 -14.6 0.17 120.7 12.06
8.0 0.74 58.3 5.14 1.81 -43.1 -17.13 0.139 -26.1 0.19 95.4 11.14
9.0 0.78 39.7 3.77 1.54 -60.7 -16.67 0.147 -37.0 0.24 70.1 10.22
10.0 0.84 25.1 2.55 1.34 -78.8 -16.21 0.155 -50.2 0.34 52.4 9.39
11.0 0.87 10.2 1.25 1.16 -97.1 -16.04 0.158 -64.2 0.41 37.3 8.65
12.0 0.89 -3.9 0.19 1.02 -114.0 -15.72 0.164 -78.3 0.46 21.5 7.96
13.0 0.90 -20.0 -1.09 0.88 -132.2 -15.86 0.161 -93.6 0.52 2.5 7.39
14.0 0.93 -31.4 -2.53 0.75 -148.3 -16.22 0.154 -106.5 0.58 -14.1 6.85
15.0 0.96 -43.9 -4.00 0.63 -162.8 -16.73 0.146 -118.2 0.66 -26.0 6.36
16.0 0.94 -54.2 -5.46 0.53 -176.5 -17.15 0.139 -128.6 0.72 -36.3 5.85
17.0 0.96 -65.1 -7.14 0.44 168.6 -17.68 0.131 -142.4 0.74 -49.0 5.27
18.0 0.93 -79.8 -8.81 0.36 153.8 -18.36 0.121 -155.6 0.77 -64.8 4.77
Freq Fmin Γopt Γopt Rn/50 Ga
GHz dB Mag. Ang. dB
0.5 0.12 0.39 17.775 0.04 25.33
0.9 0.18 0.37 46.9 0.04 22.26
1.0 0.20 0.36 53.525 0.04 21.54
1.5 0.32 0.32 80 0.04 19.16
1.9 0.43 0.30 101 0.04 17.65
2.0 0.45 0.30 107.7 0.04 17.33
2.4 0.51 0.29 125.2 0.04 16.23
3.0 0.58 0.31 154.475 0.05 14.77
3.9 0.75 0.35 -156.95 0.06 13.39
5.0 0.87 0.42 -120.93 0.09 11.92
5.8 1.01 0.50 -100.83 0.15 11.07
6.0 1.04 0.53 -97.15 0.18 10.93
Notes:
1. Fmin values at 2 GHz and higher are based on measurements while the Fmins 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 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. The parameters include the e ect of four plated through via holes con-
necting source landing pads on top of the test carrier to the microstrip ground plane on the bottom side of the carrier. Two 0.020 inch diameter
via holes are placed within 0.010 inch from each source lead contact point, one via on each side of that point.
Typical Noise Parameters, VDS = 3V, IDS = 30 mA
Figure 19. MSG/MAG and S
21
vs. Frequency
at 3V, 30 mA.
FREQUENCY (GHz)
MSG/MAG and S21 (dB)
02010 155
40
35
30
25
20
15
10
5
0
-5
-10
-15
S21
MSG