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9
ATF-34143 Typical Noise Parameters
VDS = 4 V, IDS = 40 mA
Freq.
Fmin
Γopt
Rn/50
Ga
GHz
dB
Mag.
Ang.
-
dB
0.5
0.10
0.87
13
0.16
22.8
0.9
0.13
0.82
27
0.14
19.4
1.0
0.14
0.80
31
0.13
18.9
1.5
0.17
0.73
49
0.11
17.4
1.8
0.20
0.70
60
0.10
16.9
2.0
0.22
0.66
67
0.09
16.4
2.5
0.28
0.60
85
0.07
15.6
3.0
0.34
0.54
104
0.05
14.8
4.0
0.45
142
0.03
13.3
5.0
0.57
0.40
180
0.03
12.0
6.0
0.69
0.38
-144
0.05
10.9
7.0
0.81
0.39
-111
0.11
9.9
8.0
0.94
0.43
-82
0.20
9.1
9.0
1.06
0.51
-57
0.32
8.5
10.0
1.19
0.62
-40
0.47
8.1
ATF-34143 Typical Scattering Parameters, VDS = 4 V, IDS = 40 mA
Freq.
S11
S21
S12
S22
MSG/MAG
GHz
Mag.
Ang.
dB
Mag.
Ang.
dB
Mag.
Ang.
Mag.
Ang.
dB
0.5
0.95
-40
21.56
11.973
151
0.03
0.030
68
0.33
-39
26.01
0.8
0.89
-65
21.02
11.252
135
0.04
0.042
56
0.27
-63
24.28
1.0
0.85
-82
20.19
10.217
123
0.05
0.051
48
0.26
-80
23.02
1.5
0.78
-109
18.49
8.405
104
0.06
0.064
36
0.24
-109
21.18
1.8
0.73
-131
16.93
7.024
87
0.07
0.074
27
0.22
-131
20.46
2.0
0.70
-150
15.57
6.002
73
0.08
0.081
19
0.21
-150
19.77
2.5
0.67
-167
14.36
5.223
61
0.09
0.087
12
0.20
-167
18.70
3.0
0.64
162
12.34
4.141
37
0.10
0.098
-1
0.19
165
17.75
4.0
0.63
135
10.70
3.428
16
0.11
0.108
-13
0.20
138
16.26
5.0
0.64
111
9.32
2.923
-6
0.12
0.117
-27
0.21
111
15.02
6.0
0.66
87
7.98
2.506
-26
0.12
0.124
-41
0.24
86
12.93
7.0
0.69
65
6.74
2.173
-46
0.13
0.130
-54
0.29
63
11.14
8.0
0.72
47
5.55
1.894
-65
0.13
0.134
-68
0.34
42
10.09
9.0
0.76
28
4.55
1.689
-85
0.14
0.141
-82
0.38
26
9.24
10.0
0.78
9
3.53
1.501
-104
0.15
0.145
-97
0.42
8
8.79
11.0
0.80
-11
2.39
1.317
-124
0.15
0.145
-113
0.47
-11
8.09
12.0
0.84
-29
1.02
1.125
-143
0.14
0.140
-128
0.53
-29
7.35
13.0
0.86
-44
-0.30
0.966
-160
0.13
0.133
-141
0.58
-43
6.76
14.0
0.87
-56
-1.38
0.853
-176
0.13
0.130
-152
0.62
-58
6.19
15.0
0.86
-72
-2.40
0.759
167
0.13
0.131
-165
0.65
-71
5.62
16.0
0.86
-88
-3.53
0.666
151
0.13
0.130
-180
0.68
-86
4.43
17.0
0.89
-102
-4.99
0.563
134
0.12
0.119
168
0.71
-103
3.60
18.0
0.89
-101.85
-4.99
0.563
134
0.12
0.119
168
0.71
-103
3.15
FREQUENCY (GHz)
Figure 25. MSG/MAG and |S21|2 vs.
Frequency at 4 V, 40 mA.
MSG/MAG
and
S
21
(dB)
0
4
2
8
14 16
10 12
6
18
30
25
20
15
10
5
0
-5
MSG
MAG
S21
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 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 connect-
ing 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.