
15
ATF-551M4 Typical Scattering Parameters,
V
DS
= 3V, I
DS
= 15 mA
Freq.
GHz
S
11
S
21
Mag.
S
12
Mag.
S
22
Mag.
MSG/MAG
dB
Mag.
Ang.
dB
Ang.
Ang.
Ang.
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
0.995
0.949
0.894
0.882
0.813
0.768
0.758
0.717
0.690
0.668
0.666
0.668
0.670
0.672
0.681
0.678
0.684
0.690
0.707
0.744
0.751
0.807
0.824
0.874
-6.5
-31.2
-54.1
-59.4
-84.0
-101.2
-105.1
-123.1
-138.7
-163.5
177.5
164.4
152.3
142.4
131.7
118.6
105.8
91.8
81.3
66.6
55.2
45.3
37.3
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
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
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
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
Freq
GHz
F
min
dB
Γ
opt
Mag.
Γ
opt
Ang.
R
n/50
G
a
dB
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
0.19
0.23
0.39
0.35
0.42
0.49
0.56
0.66
0.83
0.84
0.94
1.05
1.19
1.40
0.63
0.56
0.51
0.46
0.44
0.39
0.31
0.27
0.29
0.33
0.33
0.35
0.40
0.46
0.44
-6.3
6.8
10.0
36.5
40.8
50.1
72.5
104.4
146.9
167.4
169.0
-166.9
-152.7
-138.6
-121.9
0.12
0.12
0.11
0.10
0.10
0.10
0.08
0.07
0.06
0.05
0.05
0.06
0.07
0.09
0.16
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.
Typical Noise Parameters,
V
DS
= 3V, I
DS
= 15 mA
40
30
20
10
0
-10
Figure 33. MSG/MAG and |S
21
|
2
vs.
Frequency at 3V, 15 mA.
FREQUENCY (GHz)
0
20
10
5
15
M
2
|
2
|S
21
|
2
MAG
MSG
MSG