ATF-551M4 Typical Scattering Parameters, VDS = 3V, IDS = 15 mA
Freq. S11
GHz
Mag. Ang.
dB
S21
Mag. Ang.
0.1
0.995
-6.5
0.5
0.949
-31.2
0.9
0.894
-54.1
1.0
0.882
-59.4
1.5
0.813
-84.0
1.9
0.768
-101.2
2.0
0.758
-105.1
2.5
0.717
-123.1
3.0
0.690
-138.7
4.0
0.668
-163.5
5.0
0.666
177.5
6.0
0.668
164.4
7.0
0.670
152.3
8.0
0.672
142.4
9.0
0.681
131.7
10.0
0.678
118.6
11.0
0.684
105.8
12.0
0.690
91.8
13.0
0.707
81.3
14.0
0.744
66.6
15.0
0.751
55.2
16.0
0.807
45.3
17.0
0.824
37.3
18.0
0.874
31.1
22.02
21.51
20.79
20.59
19.41
18.38
18.14
16.90
15.74
13.68
11.93
10.53
9.31
8.32
7.43
6.62
5.89
5.19
4.44
3.75
2.93
1.97
1.01
0.02
12.623
11.900
10.958
10.701
9.341
8.301
8.068
6.996
6.120
4.829
3.947
3.363
2.921
2.607
2.351
2.142
1.970
1.817
1.667
1.540
1.401
1.254
1.123
1.002
175.6
156.9
142.3
138.9
123.3
112.7
110.3
99.2
89.7
73.6
59.9
48.5
37.5
27.0
16.4
5.3
-5.5
-16.8
-27.6
-39.5
-50.7
-61.4
-71.9
-82.0
S12
Mag. Ang.
0.005
0.025
0.041
0.045
0.059
0.066
0.067
0.073
0.076
0.080
0.082
0.084
0.087
0.092
0.098
0.104
0.113
0.122
0.132
0.142
0.151
0.157
0.163
0.167
86.0
71.0
60.1
57.6
46.7
39.7
38.1
31.6
26.7
20.0
15.8
14.2
12.9
11.8
10.4
7.8
4.9
0.7
-3.7
-10.0
-16.4
-22.8
-29.5
-36.2
S22
Mag. Ang.
0.802
0.754
0.700
0.682
0.599
0.537
0.522
0.459
0.407
0.334
0.286
0.250
0.232
0.218
0.209
0.209
0.215
0.226
0.221
0.211
0.218
0.236
0.277
0.330
-3.1
-14.6
-25.4
-27.8
-38.1
-44.5
-45.9
-52.0
-56.9
-65.0
-73.3
-78.4
-87.6
-97.7
-110.0
-122.9
-135.4
-147.1
-160.3
-179.5
159.7
137.8
114.5
95.0
MSG/MAG
dB
34.02
26.78
24.27
23.76
22.00
21.00
20.81
19.82
19.06
17.81
16.82
16.02
14.96
12.99
12.01
10.90
10.28
9.70
9.23
9.62
8.26
9.02
8.38
7.78
Typical Noise Parameters, VDS = 3V, IDS = 15 mA
Freq
Fmin
GHz
dB
Γopt
Mag.
Γopt
Rn/50
Ang.
0.5
0.18
0.63
-6.3
0.12
0.9
0.19
0.56
6.8
0.12
1.0
0.23
0.51
10.0
0.11
1.9
0.39
0.46
36.5
0.10
2.0
0.35
0.44
40.8
0.10
2.4
0.42
0.39
50.1
0.10
3.0
0.49
0.31
72.5
0.08
3.9
0.56
0.27
104.4
0.07
5.0
0.66
0.29
146.9
0.06
5.8
0.83
0.33
167.4
0.05
6.0
0.84
0.33
169.0
0.05
7.0
0.94
0.35
-166.9
0.06
8.0
1.05
0.40
-152.7
0.07
9.0
1.19
0.46
-138.6
0.09
10.0
1.40
0.44
-121.9
0.16
Ga
dB
24.41
22.45
22.29
18.75
18.61
17.46
16.42
14.80
13.48
12.58
12.38
11.49
10.77
10.23
9.32
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.
15