19
Notes:
1. S parameter is measured on a microstrip line
made on 0.025 inch thick alumina carrier. The
input reference plane is at the end of the gate
lead. The output reference plane is at the end
of the drain lead.
Figure 39. MSG/MAG & |S21|
2 vs Frequency
at 3.5V/360 mA.
FREQUENCY (GHz)
MSG/MAG
&
|S21|
2
(dB)
018
2
4
6
8
10
12
14
16
40
30
20
10
0
-10
-20
-30
MSG
MAG
S21
ATF-50189 Typical Scattering Parameters at 25
°C, VDS = 3.5V, IDS = 360 mA
Freq.
S11
S21
S12
S22
MSG/MAG
GHz
Mag.
Ang.
dB
Mag.
Ang.
dB
Mag.
Ang.
Mag.
Ang.
dB
0.1
0.925
-134.2
30.4
33.142
110.8
-38.4
0.012
31.9
0.73
-166.7
34.4
0.2
0.923
-159.4
25.0
17.732
97.1
-37.1
0.014
25.7
0.77
-174.9
31.0
0.3
0.924
-170.0
21.6
11.996
90.5
-36.5
0.015
25.7
0.78
-179.0
29.0
0.4
0.923
-176.6
19.1
9.042
85.8
-35.9
0.016
27.1
0.79
178.1
27.5
0.5
0.922
178.1
17.1
7.165
84.5
-35.9
0.016
31.4
0.79
174.8
26.5
0.6
0.923
174.1
15.6
6.003
81.9
-34.9
0.018
33.6
0.79
172.6
25.2
0.7
0.924
170.5
14.3
5.206
79.4
-34.4
0.019
35.5
0.79
170.5
24.4
0.8
0.925
167.1
13.3
4.608
76.8
-34.0
0.02
36.6
0.79
168.5
23.6
0.9
0.927
163.6
12.3
4.138
74.0
-33.2
0.022
37.5
0.79
166.5
22.7
1
0.928
160.5
11.5
3.757
71.2
-32.4
0.024
37.7
0.79
164.6
21.9
1.1
0.929
159.1
11.1
3.596
69.8
-32.0
0.025
37.7
0.79
163.6
21.6
1.2
0.929
157.6
10.7
3.435
68.3
-32.0
0.025
37.6
0.79
162.6
21.4
1.3
0.929
154.8
10.0
3.152
65.4
-31.7
0.026
37.1
0.79
160.8
20.8
1.4
0.925
152.0
9.3
2.918
62.5
-31.1
0.028
36.6
0.79
158.9
20.2
1.5
0.926
149.5
8.7
2.713
59.9
-30.8
0.029
36.1
0.79
157.1
19.1
1.6
0.927
146.8
8.1
2.535
57.0
-30.2
0.031
35.1
0.79
155.3
18.5
1.7
0.927
144.1
7.5
2.380
54.1
-29.9
0.032
34.1
0.79
153.4
17.8
1.8
0.927
141.3
7.0
2.231
51.5
-29.4
0.034
33.0
0.79
151.8
17.1
1.9
0.926
138.9
6.4
2.098
48.8
-29.1
0.035
31.8
0.79
150.0
16.5
2
0.926
136.4
5.9
1.977
46.2
-28.9
0.036
30.6
0.79
148.4
15.9
2.1
0.923
133.8
5.4
1.871
43.6
-28.6
0.037
29.3
0.79
146.6
15.3
2.2
0.926
131.2
5.0
1.777
41.0
-28.2
0.039
28.1
0.79
144.9
14.9
2.3
0.922
128.8
4.5
1.684
38.6
-28.0
0.04
26.6
0.79
143.5
14.3
2.4
0.919
126.3
4.1
1.600
36.0
-27.7
0.041
25.3
0.79
142.0
13.8
2.5
0.915
124.2
3.7
1.531
33.8
-27.5
0.042
24.2
0.80
140.3
13.3
3
0.913
111.9
1.6
1.208
21.7
-26.7
0.046
17.2
0.80
133.2
11.3
3.5
0.912
99.5
-0.2
0.982
12.2
-26.6
0.047
10.0
0.80
124.8
9.6
4
0.923
92.6
-1.5
0.846
3.8
-26.4
0.048
2.8
0.81
116.4
9.0
5
0.922
78.2
-4.2
0.618
-18.4
-26.0
0.05
-11.7
0.82
99.5
6.8
6
0.921
61.3
-6.4
0.477
-39.3
-25.7
0.052
-26.1
0.83
82.7
5.0
7
0.921
41.2
-8.9
0.360
-56.8
-26.0
0.05
-39.4
0.83
66.6
2.8
8
0.922
24.3
-10.9
0.286
-76.6
-26.7
0.046
-55.9
0.86
51.6
1.8
9
0.923
11.8
-12.9
0.226
-97.3
-28.4
0.038
-73.5
0.90
34.5
1.3
10
0.922
10.8
-15.0
0.177
-104.9
-31.1
0.028
-81.6
0.91
25.1
0
11
0.921
0.3
-16.4
0.152
-121.3
-34.4
0.019
-108.3
0.89
18.9
-1.6
12
0.924
-8.0
-18.1
0.124
-134.4
-46.0
0.005
-147.3
0.93
6.5
-1.0
13
0.923
-12.1
-19.6
0.105
-148.8
-40.0
0.01
71.0
0.89
-0.7
-4.4
14
0.922
-20.6
-21.2
0.087
-163.5
-37.1
0.014
30.2
0.89
-6.3
-6.2
15
0.925
-23.6
-21.4
0.085
-178.8
-39.2
0.011
-4.9
0.88
-17.1
-6.7
16
0.925
-23.1
-21.2
0.087
167.6
-37.7
0.013
-8.8
0.87
-23.1
-6.9
17
0.924
-24.3
-18.6
0.117
155.7
-41.9
0.008
-173.5
0.87
-29.2
-4.0
18
0.924
-32.5
-16.8
0.145
133.2
-35.4
0.017
161.7
0.85
-36.3
-2.4