6
ATF-38143 Typical Noise Parameters
VDS = 2 V, IDS = 5 mA
Freq.
Fmin
Γ
opt
Rn/50
Ga
GHz
dB
Mag.
Ang.
-
dB
0.5
0.18
0.69
14
0.25
23.0
0.9
0.21
0.69
26
0.23
20.5
1.0
0.22
0.68
27
0.22
19.8
1.5
0.26
0.68
44
0.20
17.1
1.8
0.29
0.66
59
0.17
16.0
2.0
0.32
0.65
61
0.17
15.4
2.5
0.40
0.62
80
0.14
14.3
3.0
0.48
0.59
98
0.11
13.1
4.0
0.60
0.50
127
0.08
10.8
5.0
0.70
0.49
163
0.04
9.8
6.0
0.84
0.51
-169
0.04
8.7
7.0
0.96
0.53
-140
0.09
7.7
8.0
1.12
0.54
-111
0.20
6.8
9.0
1.27
0.59
-88
0.36
6.1
10.0
1.38
0.62
-68
0.60
6.0
FREQUENCY (GHz)
Figure 18. MSG/MAG and |S21|2 vs.
Frequency at 2 V, 5 mA.
MSG/MAG
and
S
21
(dB)
04
2
8
14
16
10
12
618
MSG
MAG
S21
25
20
15
10
5
0
-5
-10
Notes:
1. Fmin values are based on a set of 16 noise figure measurements made at 16 different 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. The parameters include the effect of four plated
through via holes connecting 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.
ATF-38143 Typical Scattering Parameters, V
DS = 2 V, IDS = 5 mA
Freq.
S11
S21
S12
S22
MSG/MAG
(GHz)
Mag.
Ang.
dB
Mag.
Ang.
dB
Mag.
Ang.
Mag.
Ang.
(dB)
0.5
0.98
-25
14.47
5.289
160
-26.56
0.047
73
0.67
-21
20.51
0.8
0.95
-40
14.19
5.122
148
-22.85
0.072
63
0.65
-32
18.52
1.0
0.93
-51
14.00
5.010
140
-21.21
0.087
56
0.62
-40
17.60
1.5
0.87
-75
13.28
4.613
122
-18.49
0.119
41
0.56
-58
15.88
1.8
0.82
-89
12.79
4.362
111
-17.52
0.133
33
0.52
-69
15.16
2.0
0.80
-98
12.45
4.192
105
-16.95
0.142
28
0.50
-77
14.70
2.5
0.75
-120
11.48
3.751
89
-16.19
0.155
16
0.44
-94
13.84
3.0
0.71
-139
10.48
3.342
76
-15.70
0.164
5
0.40
-110
13.09
4.0
0.67
-170
8.68
2.716
52
-15.44
0.169
-12
0.34
-138
12.06
5.0
0.66
162
7.24
2.302
30
-15.44
0.169
-27
0.31
-162
11.34
6.0
0.66
137
6.02
2.000
10
-15.60
0.166
-41
0.29
173
10.81
7.0
0.68
113
4.78
1.734
-10
-15.92
0.160
-55
0.28
146
10.35
8.0
0.70
92
3.51
1.498
-29
-16.59
0.148
-67
0.29
121
8.89
9.0
0.72
73
2.39
1.316
-47
-17.20
0.138
-77
0.32
103
7.33
10.0
0.74
56
1.51
1.190
-64
-17.46
0.134
-86
0.37
87
6.93
11.0
0.78
39
0.44
1.052
-83
-17.86
0.128
-97
0.42
66
6.66
12.0
0.82
23
-0.73
0.919
-100
-18.42
0.120
-106
0.47
47
6.22
13.0
0.83
10
-2.17
0.779
-117
-19.33
0.108
-115
0.52
28
4.93
14.0
0.85
-2
-3.54
0.665
-132
-20.00
0.100
-121
0.57
11
3.95
15.0
0.87
-16
-4.84
0.573
-147
-20.45
0.095
-129
0.63
0
3.58
16.0
0.88
-30
-6.16
0.492
-161
-20.82
0.091
-136
0.68
-12
2.90
17.0
0.88
-39
-7.51
0.421
-176
-21.11
0.088
-145
0.71
-26
1.98
18.0
0.89
-50
-9.07
0.352
173
-21.83
0.081
-151
0.75
-37
1.24