ATF-531P8 Typical Scattering Parameters, VDS = 4V, 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
0.812
0.820
0.834
0.842
0.846
0.849
0.853
0.853
0.855
0.857
0.857
0.857
0.853
0.852
0.853
0.857
0.861
0.866
0.867
0.875
0.877
0.884
0.889
0.872
0.878
0.886
0.902
0.902
0.895
0.932
-56.4
-94.6
-117.3
-132.4
-141.4
-148.7
-154.4
-159.0
-162.7
-166.0
-177.3
176.2
174.7
169.2
161.7
150.8
140.9
131.6
123.5
115.1
106.9
95.6
34.07 50.547
31.95 39.582
29.87 31.147
27.99 25.104
26.46 21.036
25.08 17.954
23.88 15.628
22.80 13.809
21.85 12.376
20.97 11.186
17.58 7.568
15.57 6.007
15.34 5.847
13.77 4.879
11.80 3.889
151.8
132.2
120.2
111.8
106.3
101.6
97.9
94.8
92.0
89.6
79.7
73.3
72.0
66.0
57.6
44.6
31.8
19.7
7.9
-38.42 0.012
-34.89 0.018
-33.15 0.022
-32.40 0.024
-32.04 0.025
-31.70 0.026
-31.70 0.026
-31.37 0.027
-31.37 0.027
-31.37 0.027
-30.75 0.029
-30.17 0.031
-29.90 0.032
-29.37 0.034
-28.64 0.037
-27.54 0.042
-26.38 0.048
-25.19 0.055
-24.29 0.061
-23.22 0.069
-22.16 0.078
-21.31 0.086
-20.63 0.093
-19.91 0.101
-19.58 0.105
-19.02 0.112
-18.79 0.115
-18.49 0.119
-18.49 0.119
-18.94 0.113
62.6
45.8
36.5
30.5
27.0
24.8
23.2
22.4
21.7
21.2
21.4
21.7
22.5
23.0
24.1
23.9
22.2
18.6
15.1
10.4
4.8
0.449
0.425
0.397
0.385
0.379
0.375
0.372
0.372
0.371
0.369
0.366
0.366
0.347
0.351
0.358
0.375
0.396
0.417
0.440
0.459
0.474
0.496
0.511
0.548
0.600
0.640
0.663
0.698
0.746
0.716
-49.1
-85.0
-108.1
-123.7
-132.5
-140.4
-146.4
-151.0
-154.9
-157.9
-168.7
-174.2
-174.8
-179.7
174.2
165.7
157.8
149.6
141.8
133.4
124.8
114.1
103.7
95.1
36.25
33.42
31.51
30.20
29.25
28.39
27.79
27.09
26.61
26.17
24.17
22.87
22.62
21.57
20.22
16.28
14.11
12.50
11.10
10.16
9.40
9.24
7.18
5.45
4.02
2.72
1.76
0.71
2.896
2.285
1.873
1.589
1.367
1.224
1.085
-3.8
-15.3
-28.2
-41.0
-51.7
-64.0
-73.7
-84.8
-91.3
-101.9
-109.6
-2.6
8.69
7.93
6.24
5.55
5.05
4.93
4.37
2.93
85.3
73.9
63.6
57.6
47.2
43.7
32.1
20.6
-0.34 0.962
-1.33 0.858
-2.48 0.752
-3.57 0.663
-4.66 0.585
-5.56 0.527
-6.99 0.447
-8.75 0.365
-10.7
-18.3
-26.2
-33.3
-42.0
-49.2
-56.7
-63.9
84.0
73.1
64.4
54.7
46.5
38.2
2.36
Typical Noise Parameters, VDS = 4V, 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
0.18
0.26
0.35
0.40
0.51
0.56
0.60
0.73
0.83
1.03
1.15
1.20
1.34
1.57
1.78
1.83
0.20
0.25
0.35
0.40
0.47
0.51
0.56
0.60
0.66
0.68
0.72
0.72
0.78
0.83
0.82
0.85
166.00
169.00
171.00
173.00
177.20
-174.50
-169.30
-162.90
-157.60
-145.50
-137.10
-135.20
-126.70
-117.00
-107.90
-95.70
0.014
0.018
0.021
0.021
0.022
0.022
0.023
0.030
0.040
0.085
0.140
0.160
0.300
0.630
0.880
1.460
28.57
24.42
24.32
21.25
19.35
17.66
16.37
15.09
14.82
12.76
11.55
11.31
10.55
9.81
MAG
S21
-10
0
5
10
FREQUENCY (GHz)
15
20
Figure 29. MSG/MAG & |S21|2 (dB)
@ 4V, 135 mA.
8.86
8.17
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.
9
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