7
Freq
Fmin
Γ
opt
Γ
opt
Rn/50
Ga
GHz
dB
Mag.
Ang.
dB
0.50
0.37
0.377
0.7
0.07
21.42
0.90
0.41
0.367
24.5
0.06
18.53
1.00
0.42
0.366
31.1
0.06
18.28
1.50
0.46
0.365
61.6
0.05
15.95
1.80
0.49
0.37
77.8
0.05
15.42
2.00
0.51
0.374
87.9
0.05
14.61
2.50
0.55
0.392
110.5
0.04
13.33
3.00
0.59
0.416
129.6
0.04
12.25
4.00
0.68
0.479
159.2
0.03
10.5
5.00
0.77
0.553
179.4
0.02
9.06
6.00
0.86
0.627
-167.2
0.02
8.05
7.00
0.95
0.69
-157.6
0.04
7.13
8.00
1.04
0.733
-149.2
0.06
6.38
9.00
1.13
0.742
-139.1
0.1
5.97
10.00
1.22
0.709
-124.7
0.18
5
Notes:
1. 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 Fmin is calculated. Refer to the noise parameter measurement section for more information.
2. S and noise parameters are measured on a microstrip line made on 0.010 inch thick alumina carrier assembly. The input reference plane is at the end of
the gate pad. The output reference plane is at the end of the drain pad.
Typical Noise Parameters,
VDS = 3V, IDS = 40 mA
Figure 19. MSG/MAG and |S21|
2 vs.
Frequency at 3 V , 40 mA.
MSG
MAG
FREQUENCY (GHz)
MSG/MAG
and
|S
21
|
2 (dB)
020
10
515
40
30
20
10
0
-10
|S21|
2
ATF-331M4 Typical Scattering Parameters,
VDS = 3V, IDS = 40 mA
Freq.
S11
S21
S12
S22
MSG/MAG
GHz
Mag.
Ang.
dB
Mag.
Ang.
dB
Mag.
Ang.
Mag.
Ang.
dB
0.5
0.82
-90.50
22.45
13.27
128.40
-27.54
0.042
53.80
0.38
-155.50
24.99
0.8
0.78
-117.70
19.31
9.24
113.30
-25.35
0.054
47.10
0.44
-165.77
22.33
1.0
0.77
-130.90
18.50
8.41
106.40
-24.58
0.059
45.10
0.46
-170.63
21.54
1.5
0.75
-150.40
15.23
5.77
93.93
-22.97
0.071
43.03
0.49
180.17
19.10
1.8
0.74
-158.70
14.02
5.02
88.30
-21.94
0.080
42.33
0.49
-184.17
17.98
2.0
0.74
-162.70
13.79
4.89
85.10
-21.51
0.084
42.13
0.50
173.27
17.65
2.5
0.72
-170.00
10.81
3.47
77.97
-20.18
0.098
41.53
0.50
166.80
15.49
3.0
0.69
-174.10
9.60
3.02
71.63
-18.24
0.122
40.67
0.52
163.70
13.92
4.0
0.71
163.70
7.13
2.27
53.03
-17.33
0.136
30.70
0.52
139.43
11.20
5.0
0.73
150.50
5.46
1.87
41.40
-16.83
0.144
25.67
0.52
136.10
9.63
6.0
0.71
141.50
4.37
1.65
28.50
-16.31
0.153
18.13
0.54
118.23
8.02
7.0
0.73
124.40
3.34
1.47
14.10
-15.55
0.167
8.10
0.54
111.83
7.28
8.0
0.74
113.40
3.14
1.44
6.00
-15.19
0.174
3.57
0.54
110.90
7.28
9.0
0.76
98.20
2.94
1.40
-5.57
-15.14
0.175
-4.97
0.55
95.33
7.05
10.0
0.79
84.10
2.33
1.31
-19.10
-14.94
0.179
-16.07
0.55
80.50
6.83
11.0
0.86
62.40
0.44
1.05
-33.40
-14.94
0.179
-28.27
0.55
67.80
6.40
12.0
0.87
62.50
-0.38
0.96
-38.90
-14.47
0.189
-32.20
0.61
61.73
6.00
13.0
0.88
52.30
-1.20
0.87
-50.90
-14.99
0.178
-42.87
0.66
50.97
5.55
14.0
0.89
44.90
-1.79
0.81
-60.20
-15.55
0.167
-50.87
0.70
41.63
5.33
15.0
0.91
39.00
-3.64
0.66
-69.10
-15.81
0.162
-59.03
0.73
32.17
4.81
16.0
0.93
33.40
-5.30
0.54
-76.40
-18.64
0.117
-65.67
0.76
26.13
4.49
17.0
0.93
28.50
-5.40
0.54
-82.40
-17.79
0.129
-71.87
0.78
19.77
4.48
18.0
0.92
25.10
-6.34
0.48
-86.10
-17.92
0.127
-76.40
0.80
14.87
3.39