ATF-551M4 Typical Scattering Parameters,
V
DS
= 2V, I
DS
= 20 mA
Freq.
GHz
0.1
0.5
0.9
1.0
1.5
1.9
2.0
2.5
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
17.0
18.0
S
11
Mag.
0.994
0.942
0.882
0.869
0.798
0.753
0.744
0.706
0.681
0.663
0.664
0.666
0.670
0.673
0.681
0.678
0.682
0.688
0.706
0.743
0.753
0.804
0.824
0.869
Ang.
-6.9
-33.3
-57.3
-62.8
-88.1
-105.5
-109.5
-127.4
-142.7
-167.0
174.6
161.9
150.1
140.4
129.8
117.1
104.3
90.6
80.3
65.9
54.4
44.7
36.7
30.6
dB
22.85
22.27
21.44
21.21
19.90
18.79
18.53
17.22
16.01
13.88
12.09
10.68
9.43
8.42
7.51
6.68
5.94
5.23
4.48
3.76
2.92
1.93
0.95
-0.05
S
21
Mag.
13.876
12.985
11.806
11.491
9.881
8.704
8.443
7.262
6.314
4.943
4.021
3.418
2.962
2.637
2.373
2.158
1.982
1.826
1.675
1.542
1.400
1.249
1.116
0.994
S
12
Ang.
175.3
155.7
140.5
137.1
121.3
110.7
108.4
97.5
88.2
72.5
59.3
48.1
37.3
27.1
16.8
6.0
-4.6
-15.6
-26.3
-38.0
-48.9
-59.3
-69.4
-78.9
S
22
Ang.
85.6
70.4
59.0
56.5
45.7
38.9
37.4
31.3
26.7
20.3
16.2
14.1
12.0
10.0
7.4
3.7
-0.2
-5.2
-10.3
-17.0
-23.6
-30.1
-36.5
-43.0
Mag.
0.006
0.027
0.045
0.048
0.062
0.070
0.071
0.077
0.081
0.085
0.089
0.093
0.097
0.103
0.109
0.117
0.125
0.133
0.142
0.150
0.157
0.160
0.163
0.165
Mag.
0.740
0.687
0.627
0.608
0.520
0.455
0.441
0.376
0.323
0.248
0.201
0.162
0.144
0.133
0.131
0.139
0.154
0.168
0.169
0.182
0.212
0.250
0.306
0.367
Ang.
-3.9
-17.8
-30.9
-33.8
-46.4
-54.4
-56.3
-64.3
-71.0
-82.9
-95.2
-103.7
-116.4
-130.0
-145.9
-160.3
-172.7
176.9
161.6
139.6
121.2
103.8
87.0
73.0
MSG/MAG
dB
33.64
26.82
24.19
23.79
22.02
20.95
20.75
19.75
18.92
17.65
16.55
15.65
14.85
12.78
11.65
10.56
9.80
9.11
8.56
8.46
7.48
7.76
6.93
7.80
Typical Noise Parameters,
V
DS
= 2V, I
DS
= 20 mA
Freq
GHz
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
MSG/MAG and |S
21
|
2
(dB)
F
min
dB
0.19
0.20
0.25
0.41
0.36
0.43
0.51
0.58
0.70
0.85
0.86
0.94
1.07
1.20
1.43
Γ
opt
Mag.
0.59
0.54
0.48
0.43
0.41
0.37
0.29
0.26
0.29
0.34
0.35
0.37
0.42
0.48
0.46
Γ
opt
Ang.
-7.0
6.3
10.1
38.7
43.1
53.4
76.3
112.7
154.0
173.6
175.9
-162.3
-148.2
-135.2
-119.5
R
n/50
0.11
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
G
a
dB
23.50
21.66
21.61
18.04
17.88
16.76
15.66
14.10
12.74
11.83
11.63
10.71
9.99
9.36
8.46
40
30
MSG
20
MAG
MSG
10
|S
21
|
2
0
-10
0
5
10
FREQUENCY (GHz)
15
20
Figure 28. MSG/MAG and |S
21
|
2
vs.
Frequency at 2V, 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.
10