ATF-531P8 Typical Scattering Parameters, VDS = 3V, IDS = 135 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
0.823
0.826
0.842
0.846
0.851
0.850
0.855
0.856
0.859
0.857
0.857
0.858
0.855
0.855
0.854
0.858
0.860
0.868
0.866
0.877
0.876
0.880
0.883
0.874
0.878
0.884
0.906
0.907
0.893
0.925
-57.1
-95.6
-118.2
-133.1
-142.0
-149.2
-154.9
-159.5
-163.2
-166.3
-177.7
175.8
174.4
168.8
161.4
150.7
140.4
131.4
123.2
114.8
106.3
95.1
33.96 49.888
31.82 38.989
29.66 30.415
27.75 24.416
26.21 20.452
24.83 17.443
23.62 15.178
22.55 13.405
21.59 12.012
20.71 10.853
17.32 7.342
15.31 5.828
15.08 5.676
13.51 4.738
11.54 3.774
151.3
131.6
119.6
111.4
105.9
101.4
97.7
94.7
92.0
89.6
79.9
73.6
72.3
66.4
58.2
45.3
32.8
21.0
9.4
-37.72 0.013
-33.98 0.020
-32.77 0.023
-32.04 0.025
-31.70 0.026
-31.37 0.027
-31.37 0.027
-31.06 0.028
-31.06 0.028
-30.75 0.029
-30.46 0.030
-29.90 0.032
-29.37 0.034
-29.12 0.035
-28.40 0.038
-27.13 0.044
-26.02 0.050
-24.88 0.057
-23.88 0.064
-22.85 0.072
-21.83 0.081
-21.11 0.088
-20.35 0.096
-19.83 0.102
-19.41 0.107
-18.94 0.113
-18.71 0.116
-18.49 0.119
-18.42 0.120
-18.86 0.114
62.6
45.7
36.0
30.1
26.8
24.4
22.9
22.1
21.4
21.1
21.0
21.6
22.1
22.6
22.8
22.7
20.7
17.2
13.4
8.5
0.427
0.418
0.421
0.420
0.419
0.419
0.419
0.420
0.421
0.419
0.418
0.418
0.410
0.403
0.409
0.423
0.440
0.457
0.475
0.490
0.502
0.519
0.530
0.566
0.613
0.652
0.670
0.704
0.747
0.717
-55.1
-92.8
-115.9
-130.7
-139.0
-146.4
-151.9
-156.1
-159.7
-162.6
-172.9
-178.2
-179.1
176.0
169.8
161.0
152.8
144.4
136.6
128.0
119.3
108.7
98.4
35.84
32.90
31.21
29.90
28.96
28.10
27.50
26.80
26.32
25.73
23.89
22.60
22.23
21.32
19.97
16.15
13.82
12.31
10.81
10.00
9.09
8.98
6.92
5.21
3.79
2.52
1.57
0.56
2.812
2.219
1.821
1.547
1.337
1.198
1.066
-2.0
-13.7
-26.0
-38.2
-49.6
-61.1
-71.0
-80.8
-88.0
-99.8
-107.2
2.6
-5.0
8.20
7.31
6.06
5.32
4.87
4.76
4.29
2.90
84.7
73.6
62.9
56.9
46.7
42.9
32.2
20.7
-0.46 0.948
-1.51 0.840
-2.56 0.745
-3.54 0.665
-4.70 0.582
-5.61 0.524
-6.80 0.457
-8.38 0.381
-12.9
-20.7
-28.5
-35.9
-43.9
-51.4
-58.7
-66.3
90.7
79.7
69.3
60.8
51.6
43.7
35.8
2.20
Typical Noise Parameters, VDS = 3V, IDS = 135 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
0.25
0.30
0.30
0.36
0.45
0.52
0.66
0.70
0.87
1.02
1.13
1.24
1.34
1.58
1.78
1.88
0.20
0.25
0.35
0.40
0.46
0.52
0.56
0.62
0.65
0.67
0.71
0.73
0.82
0.83
0.81
0.83
166.00
169.00
171.00
173.00
176.80
-174.70
-169.80
-162.80
-157.90
-145.70
-136.80
-135.10
-126.20
-116.90
-107.50
-95.40
0.020
0.022
0.018
0.019
0.020
0.021
0.025
0.028
0.042
0.082
0.140
0.175
0.380
0.645
0.870
1.350
28.47
24.36
24.24
21.17
19.30
18.08
16.26
15.33
14.62
12.52
11.53
11.40
10.57
9.67
MAG
S21
-10
0
5
10
FREQUENCY (GHz)
15
20
Figure 32. MSG/MAG & |S21|2 (dB)
@ 3V, 135 mA.
8.59
7.76
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.
12
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