ATF-551M4 Typical Scattering Parameters, VDS = 2.7V, 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
-54.0
1.0
0.882
-59.4
1.5
0.814
-84.0
1.9
0.768
-101.1
2.0
0.758
-105.1
2.5
0.718
-123.1
3.0
0.691
-138.7
4.0
0.668
-163.5
5.0
0.667
177.5
6.0
0.668
164.3
7.0
0.671
152.2
8.0
0.673
142.3
9.0
0.682
131.6
10.0
0.677
118.5
11.0
0.684
105.8
12.0
0.690
91.7
13.0
0.707
81.2
14.0
0.744
66.4
15.0
0.750
55.1
16.0
0.806
45.2
17.0
0.824
37.1
18.0
0.872
31.0
21.98
21.47
20.75
20.55
19.37
18.34
18.10
16.86
15.70
13.64
11.88
10.49
9.26
8.27
7.37
6.56
5.83
5.12
4.38
3.68
2.85
1.88
0.92
-0.08
12.559
11.839
10.905
10.650
9.298
8.265
8.034
6.966
6.095
4.806
3.928
3.345
2.904
2.591
2.335
2.128
1.956
1.804
1.656
1.528
1.389
1.242
1.112
0.991
175.6
156.9
142.3
138.9
123.4
112.7
110.3
99.3
89.7
73.6
59.9
48.5
37.5
27.0
16.4
5.4
-5.3
-16.7
-27.5
-39.4
-50.6
-61.2
-71.5
-81.5
S12
Mag. Ang.
0.006
0.026
0.043
0.047
0.061
0.068
0.070
0.076
0.079
0.083
0.085
0.088
0.091
0.095
0.101
0.107
0.115
0.124
0.133
0.143
0.151
0.156
0.162
0.166
86.4
71.0
60.1
57.5
46.6
39.5
38.0
31.4
26.3
19.4
15.0
13.1
11.4
10.0
8.4
5.6
2.6
-1.7
-6.1
-12.3
-18.7
-25.1
-31.6
-38.2
S22
Mag. Ang.
0.793
0.745
0.691
0.673
0.589
0.526
0.511
0.447
0.393
0.318
0.268
0.230
0.212
0.198
0.190
0.190
0.198
0.210
0.205
0.200
0.212
0.236
0.282
0.337
-3.2
-15.2
-26.4
-28.9
-39.7
-46.6
-48.1
-54.6
-59.9
-68.8
-77.7
-83.3
-93.0
-103.4
-116.2
-129.6
-142.6
-154.2
-167.8
172.5
150.9
129.7
107.9
89.7
MSG/MAG
dB
33.21
26.58
24.04
23.55
21.83
20.85
20.60
19.62
18.87
17.63
16.65
15.80
15.04
12.89
11.88
10.70
10.06
9.46
8.93
9.10
7.85
9.01
8.37
7.76
Typical Noise Parameters, VDS = 2.7V, IDS = 15 mA
Freq
Fmin
GHz
dB
Γopt
Mag.
Γopt
Rn/50
Ang.
0.5
0.18
0.61
-6.0
0.12
0.9
0.18
0.56
6.8
0.12
1.0
0.24
0.5
10.7
0.11
1.9
0.38
0.45
36.9
0.1
2.0
0.33
0.43
41.9
0.1
2.4
0.42
0.39
50.9
0.1
3.0
0.5
0.31
73.0
0.08
3.9
0.55
0.28
107.0
0.07
5.0
0.66
0.29
146.6
0.06
5.8
0.83
0.33
168.7
0.05
6.0
0.84
0.34
170.7
0.05
7.0
0.95
0.36
-166.9
0.06
8.0
1.06
0.41
-152.3
0.07
9.0
1.18
0.46
-138.1
0.1
10.0
1.43
0.44
-122.5
0.16
Ga
dB
24.49
22.38
22.32
18.78
18.65
17.47
16.37
14.83
13.4
12.54
12.36
11.44
10.69
10.12
9.21
40
30
MSG
20
10
|S21|2
0
MAG
MSG
-10
0
5
10
15
20
FREQUENCY (GHz)
Figure 30. MSG/MAG and |S21|2 vs.
Frequency at 2.7V, 15 mA.
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.
12