7
ATF-34143 Typical Noise Parameters
VDS = 3 V, IDS = 20 mA
Freq.
Fmin
Γ
opt
Rn/50
Ga
GHz
dB
Mag.
Ang.
-
dB
0.5
0.10
0.90
13
0.16
21.8
0.9
0.11
0.85
27
0.14
18.3
1.0
0.11
0.84
31
0.13
17.8
1.5
0.14
0.77
48
0.11
16.4
1.8
0.17
0.74
57
0.10
16.0
2.0
0.19
0.71
66
0.09
15.6
2.5
0.23
0.65
83
0.07
14.8
3.0
0.29
0.59
102
0.06
14.0
4.0
0.42
0.51
138
0.03
12.6
5.0
0.54
0.45
174
0.03
11.4
6.0
0.67
0.42
-151
0.05
10.3
7.0
0.79
0.42
-118
0.10
9.4
8.0
0.92
0.45
-88
0.18
8.6
9.0
1.04
0.51
-63
0.30
8.0
10.0
1.16
0.61
-43
0.46
7.5
ATF-34143 Typical Scattering Parameters, V
DS = 3 V, IDS = 20 mA
Freq.
S11
S21
S12
S22
MSG/MAG
GHz
Mag.
Ang.
dB
Mag.
Ang.
dB
Mag.
Ang.
Mag.
Ang.
dB
0.5
0.96
-37
20.07
10.079
153
-29.12
0.035
68
0.40
-35
24.59
0.8
0.91
-60
19.68
9.642
137
-26.02
0.050
56
0.34
-56
22.85
1.0
0.87
-76
18.96
8.867
126
-24.29
0.061
48
0.32
-71
21.62
1.5
0.81
-104
17.43
7.443
106
-22.27
0.077
34
0.29
-98
19.85
1.8
0.78
-115
16.70
6.843
98
-21.62
0.083
28
0.28
-110
19.16
2.0
0.75
-126
16.00
6.306
90
-21.11
0.088
23
0.26
-120
18.55
2.5
0.72
-145
14.71
5.438
75
-20.45
0.095
15
0.25
-140
17.58
3.0
0.69
-162
13.56
4.762
62
-19.83
0.102
7
0.23
-156
16.69
4.0
0.65
166
11.61
3.806
38
-19.09
0.111
-8
0.22
174
15.35
5.0
0.64
139
10.01
3.165
16
-18.49
0.119
-21
0.22
146
14.25
6.0
0.65
114
8.65
2.706
-5
-18.06
0.125
-35
0.23
118
13.35
7.0
0.66
89
7.33
2.326
-27
-17.79
0.129
-49
0.25
91
10.91
8.0
0.69
67
6.09
2.017
-47
-17.52
0.133
-62
0.29
67
9.71
9.0
0.72
48
4.90
1.758
-66
-17.39
0.135
-75
0.34
46
8.79
10.0
0.75
30
3.91
1.568
-86
-17.08
0.140
-88
0.39
28
8.31
11.0
0.77
10
2.88
1.393
-105
-16.95
0.142
-103
0.43
10
7.56
12.0
0.80
-10
1.74
1.222
-126
-16.95
0.142
-118
0.47
-10
6.83
13.0
0.83
-29
0.38
1.045
-145
-17.39
0.135
-133
0.53
-28
6.18
14.0
0.85
-44
-0.96
0.895
-161
-17.86
0.128
-145
0.58
-42
5.62
15.0
0.86
-55
-2.06
0.789
-177
-18.13
0.124
-156
0.62
-57
5.04
16.0
0.85
-72
-3.09
0.701
166
-18.13
0.124
-168
0.65
-70
3.86
17.0
0.85
-88
-4.22
0.615
149
-18.06
0.125
177
0.68
-85
3.00
18.0
0.88
-101
-5.71
0.518
133
-18.94
0.113
165
0.71
-103
2.52
FREQUENCY (GHz)
Figure 23. MSG/MAG and |S21|2 vs.
Frequency at 3 V, 20 mA.
MSG/MAG
and
S
21
(dB)
04
2
8
14
16
10
12
618
25
20
15
10
5
0
-5
-10
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 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.