ATF-551M4 Typical Scattering Parameters, VDS = 2.7V, IDS = 20 mA
Freq.
GHz
S11
S21
Mag.
S12
S22
MSG/MAG
dB
Mag.
Ang.
dB
Ang.
Mag.
Ang.
Mag.
Ang.
0.1
0.995
0.943
0.883
0.87
-6.8
22.92
22.35
21.53
21.30
20.00
18.91
18.65
17.35
16.14
14.02
12.25
10.84
9.61
13.988
13.103
11.932
11.616
10.004
8.822
8.557
7.367
6.411
5.026
4.095
3.483
3.022
2.695
2.429
2.213
2.034
1.876
1.722
1.59
175.4
155.9
140.7
137.3
121.6
111.0
108.6
97.8
0.005
0.024
0.04
86.4
70.6
59.4
56.9
46.2
39.6
38.2
32.3
27.8
22.0
18.6
17.4
16.1
14.8
13.0
9.9
0.772
0.72
-3.4
34.47
27.37
24.75
24.32
22.52
21.46
21.26
20.28
19.50
18.20
17.15
16.23
14.69
13.08
12.08
11.08
10.44
9.85
0.5
-33.0
-56.9
-62.4
-87.6
-104.9
-108.8
-126.7
-142.1
-166.3
175.2
162.6
150.9
141.2
130.8
118.1
105.4
91.4
-15.7
-27.1
-29.6
-40.2
-46.7
-48.1
-54.2
-59.0
-67.2
-75.7
-80.7
-90.4
-100.6
-113.5
-127.2
-140.4
-152.2
-165.9
173.7
151.1
129.5
107.3
88.8
0.9
0.662
0.643
0.557
0.494
0.48
1.0
0.043
0.056
0.063
0.064
0.069
0.072
0.076
0.079
0.083
0.087
0.093
0.099
0.107
0.116
0.126
0.136
0.146
0.154
0.159
0.165
0.168
1.5
0.798
0.752
0.743
0.704
0.68
1.9
2.0
2.5
0.417
0.367
0.297
0.251
0.216
0.199
0.185
0.177
0.178
0.186
0.198
0.193
0.188
0.2
3.0
88.4
4.0
0.66
72.8
5.0
0.662
0.664
0.667
0.67
59.5
6.0
48.4
7.0
37.6
8.0
8.61
27.3
9.0
0.679
0.677
0.683
0.688
0.705
0.741
0.75
7.71
16.9
10.0
11.0
12.0
13.0
14.0
15.0
16.0
17.0
18.0
6.90
6.0
6.17
-4.6
6.4
5.46
-15.8
-26.5
-38.3
-49.5
-60.1
-70.3
-80.2
1.8
80.9
4.72
-3.2
9.37
66.5
4.03
-9.8
9.78
55.0
3.19
1.444
1.291
1.156
1.032
-16.5
-23.2
-29.8
-36.6
8.35
0.803
0.823
0.872
45.1
2.22
0.224
0.269
0.325
9.10
37.2
1.26
8.45
31.0
0.27
7.88
Typical Noise Parameters, VDS = 2.7V, IDS = 20 mA
40
30
20
10
0
Freq
GHz
Fmin
dB
Γopt
Γopt
Rn/50
Ga
Mag.
Ang.
dB
MSG
0.5
0.9
1.0
1.9
2.0
2.4
3.0
3.9
5.0
5.8
6.0
7.0
8.0
9.0
10.0
0.18
0.18
0.23
0.39
0.36
0.43
0.51
0.56
0.68
0.83
0.85
0.95
1.06
1.19
1.41
0.61
0.55
0.49
0.43
0.42
0.37
0.29
0.26
0.28
0.33
0.33
0.37
0.41
0.47
0.46
-6.7
0.12
0.11
0.10
0.09
0.09
0.09
0.08
0.07
0.05
0.05
0.05
0.06
0.08
0.10
0.17
24.89
22.72
22.68
19.18
18.98
17.83
16.69
15.19
13.79
12.91
12.73
11.80
11.06
10.47
9.59
5.9
9.9
MAG
MSG
37.8
2
41.6
|S |
21
51.7
73.6
-10
110.7
152.8
172.9
175.6
-162.4
-148.8
-135.5
-119.2
0
5
10
FREQUENCY (GHz)
15
20
Figure 31. MSG/MAG and |S21|2 vs.
Frequency at 2.7V, 20 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.
13
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