ATF-531P8 Typical Scattering Parameters, VDS = 4V, IDS = 75 mA
Freq.
GHz
S11
S21
Mag.
S12
Mag.
S22
MSG/MAG
dB
Mag.
Ang.
dB
Ang.
dB
Ang.
Mag. Ang.
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
1.5
1.9
2
2.4
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
0.930
0.889
0.876
0.867
0.862
0.858
0.857
0.856
0.854
0.857
0.853
0.853
0.848
0.846
0.848
0.850
0.853
0.861
0.861
0.868
0.873
0.875
0.881
0.871
0.873
0.885
0.891
0.912
0.895
0.933
-51.3
-88.3
-111.6
-127.3
-137.0
-144.7
-151.0
-156.0
-160.0
-163.5
-175.7
177.6
176.2
170.3
162.4
151.6
141.4
132.3
123.8
115.6
107.1
95.8
33.70 48.399
31.65 38.230
29.58 30.121
27.71 24.294
26.18 20.379
24.81 17.405
23.62 15.165
22.54 13.404
21.59 12.005
20.72 10.859
17.33 7.351
15.33 5.839
15.09 5.681
13.52 4.742
11.55 3.780
152.3
132.6
120.6
112.2
106.6
101.9
98.2
95.0
92.2
89.8
79.8
73.3
72.0
66.0
57.5
44.3
31.5
19.4
7.5
-37.08 0.014
-32.77 0.023
-31.37 0.027
-30.75 0.029
-30.46 0.030
-30.17 0.031
-29.90 0.032
-29.90 0.032
-29.63 0.033
-29.63 0.033
-29.12 0.035
-28.87 0.036
-28.64 0.037
-28.18 0.039
-27.74 0.041
-26.94 0.045
-25.85 0.051
-25.04 0.056
-24.01 0.063
-23.22 0.069
-22.16 0.078
-21.41 0.085
-20.63 0.093
-20.00 0.100
-19.66 0.104
-19.17 0.110
-18.79 0.115
-18.56 0.118
-18.49 0.119
-19.02 0.112
63.6
46.8
36.1
29.5
25.9
23.1
21.1
19.9
18.3
18.2
16.3
16.5
16.7
17.0
17.0
16.7
15.4
12.9
9.8
0.524
0.467
0.436
0.415
0.405
0.397
0.392
0.390
0.387
0.384
0.380
0.379
0.360
0.363
0.369
0.385
0.405
0.426
0.447
0.467
0.481
0.501
0.515
0.553
0.604
0.644
0.666
0.700
0.748
0.718
-45.7
-80.7
-103.2
-119.1
-128.4
-136.8
-143.2
-148.2
-152.3
-155.6
-167.2
-173.2
-173.8
-179.0
174.6
165.7
157.5
149.2
141.3
132.8
124.1
113.3
102.9
94.5
35.39
32.21
30.48
29.23
28.32
27.49
26.76
26.22
25.61
25.17
23.22
22.10
21.86
20.85
19.65
16.29
13.90
12.31
10.85
9.85
8.98
6.93
5.22
3.78
2.50
1.51
0.50
2.813
2.220
1.824
1.546
1.334
1.190
1.059
-4.3
5.5
0.4
-6.6
-15.9
-28.8
-41.2
-52.5
-63.9
-74.0
-85.2
-93.5
-102.3
-110.5
9.15
8.19
7.40
6.12
5.28
4.89
4.38
5.43
85.6
74.2
63.7
57.0
47.0
43.7
32.2
21.2
-0.57 0.937
-1.56 0.836
-2.65 0.737
-3.80 0.646
-4.72 0.581
-5.76 0.515
-7.15 0.439
-8.66 0.369
-13.8
-21.4
-28.8
-36.3
-43.7
-51.7
-58.5
-65.8
83.4
72.5
63.7
54.2
46.0
37.8
2.90
2.74
Typical Noise Parameters, VDS = 4V, IDS = 75 mA
40
30
20
10
0
Freq
GHz
Fmin
dB
Γopt
Mag.
Γopt
Ang.
Rn/50
Ga
dB
MSG
0.5
0.9
1
1.5
2
2.4
3
3.5
3.9
5
5.8
6
7
8
9
0.15
0.20
0.22
0.30
0.36
0.44
0.50
0.55
0.63
0.80
0.90
0.91
1.14
1.24
1.49
1.61
0.10
0.15
0.20
0.30
0.35
0.43
0.47
0.58
0.60
0.67
0.72
0.72
0.71
0.74
0.74
0.76
130.00
135.00
143.00
148.00
154.10
168.70
179.30
-170.80
-164.80
-150.90
-140.80
-139.50
-129.10
-119.90
-109.70
-97.30
0.016
0.019
0.019
0.022
0.024
0.022
0.022
0.019
0.024
0.050
0.095
0.100
0.180
0.285
0.460
0.720
27.97
23.50
23.02
20.07
17.85
16.35
15.29
14.11
14.01
11.92
11.00
10.56
9.80
MAG
S21
-10
0
5
10
FREQUENCY (GHz)
15
20
Figure 30. MSG/MAG & |S21|2 (dB)
@ 4V, 75 mA.
9.31
8.41
7.73
10
Notes:
1. Fmin values at 2 GHz and higher are based on measurements while the Fmins below 2 GHz have been extrapolated. 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 a true Fmin is calculated.
2. S and noise parameters are 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.
10
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