ATF-531P8 Typical Scattering Parameters at 25°C, VDS = 4V, IDS = 180 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
0.626
0.704
0.761
0.794
0.815
0.824
0.834
0.840
0.845
0.848
0.854
0.857
0.853
0.853
0.855
0.858
0.864
0.871
0.869
0.880
0.883
0.884
0.874
0.874
0.877
0.884
0.894
0.896
0.898
0.918
-59.4
-97.4
-119.4
-133.8
-142.5
-149.6
-155.1
-159.7
-163.3
-166.4
-177.7
175.9
174.4
168.9
161.6
150.8
140.7
131.7
123.5
115.2
106.8
95.7
33.20 45.702
31.41 37.192
29.53 29.950
27.78 24.477
26.32 20.693
24.99 17.760
23.82 15.516
22.76 13.742
21.83 12.346
20.96 11.164
17.59 7.579
15.60 6.024
15.36 5.863
13.79 4.894
11.83 3.902
154.5
135.8
123.5
114.8
108.9
103.9
99.9
96.6
93.6
91.0
80.6
73.9
72.6
66.5
57.9
44.6
31.6
19.4
7.5
-40.00 0.010
-35.92 0.016
-34.42 0.019
-33.56 0.021
-32.77 0.023
-32.77 0.023
-32.40 0.024
-32.40 0.024
-32.04 0.025
-32.04 0.025
-31.37 0.027
-30.75 0.029
-30.46 0.030
-29.90 0.032
-29.12 0.035
-27.74 0.041
-26.56 0.047
-25.35 0.054
-24.29 0.061
-23.35 0.068
-22.27 0.077
-21.41 0.085
-20.63 0.093
-19.91 0.101
-19.49 0.106
-19.02 0.112
-18.71 0.116
-18.49 0.119
-18.49 0.119
-18.94 0.113
62.6
48.8
39.1
33.7
30.0
27.4
25.8
24.6
24.2
23.8
23.5
24.4
24.9
25.8
26.6
26.5
24.3
21.2
17.4
12.6
7.0
0.410
0.384
0.370
0.360
0.355
0.351
0.349
0.349
0.349
0.347
0.344
0.344
0.335
0.339
0.337
0.356
0.378
0.402
0.427
0.449
0.465
0.489
0.505
0.544
0.596
0.638
0.662
0.699
0.748
0.718
-44.4
-79.2
-101.8
-117.6
-127.1
-135.5
-141.9
-146.9
-151.1
-154.3
-165.8
-171.2
-171.8
-176.8
177.0
168.5
160.6
152.4
144.6
136.1
127.4
116.6
106.0
97.2
36.60
33.66
31.98
30.67
29.54
28.88
28.11
27.58
26.94
26.50
24.48
23.17
22.91
21.85
19.60
16.23
14.19
12.69
11.18
10.39
9.70
9.27
7.20
5.48
4.04
2.73
1.77
0.70
2.906
2.292
1.879
1.593
1.370
1.226
1.084
-4.3
-16.1
-29.0
-41.6
-52.8
-64.5
-74.6
-85.4
-93.6
-102.6
-110.5
-0.8
-8.8
8.70
7.20
6.30
5.46
4.95
4.29
4.06
2.82
85.1
74.1
63.3
57.9
46.8
43.3
31.9
20.8
-0.34 0.962
-1.39 0.852
-2.52 0.748
-3.64 0.658
-4.81 0.575
-5.66 0.521
-7.25 0.434
-8.61 0.371
-16.6
-24.6
-31.9
-39.8
-47.8
-55.1
-62.6
85.9
74.7
65.9
56.1
47.7
39.3
1.75
Typical Noise Parameters at 25°C, VDS = 4V, IDS = 180 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
0.50
0.59
0.60
0.72
0.81
0.90
1.01
1.10
1.13
1.34
1.48
1.58
1.68
1.89
2.15
2.34
0.20
0.25
0.35
0.40
0.57
0.61
0.63
0.67
0.70
0.72
0.75
0.76
0.80
0.84
0.82
0.85
166.00
169.00
171.00
173.00
-173.50
-167.70
-163.50
-158.20
-153.90
-142.70
-135.40
-133.30
-125.00
-116.10
-106.90
-95.10
0.041
0.044
0.036
0.039
0.029
0.033
0.041
0.054
0.068
0.139
0.229
0.278
0.470
0.860
1.170
2.010
28.26
24.27
24.15
21.14
20.07
18.73
16.91
15.86
15.12
13.08
12.04
11.82
10.69
9.97
MAG
S21
-10
0
5
10
FREQUENCY (GHz)
15
20
Figure 28. MSG/MAG & |S21|2 (dB)
@ 4V, 180 mA.
8.96
8.09
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.
8
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