2SA1978 Datasheet, PDF (6/10 Pages) NEC – PNP EPITAXIAL SILICON TRANSISTOR MICROWAVE AMPLIFIER

S-PARAMETER
(VCE = 1 V, IC = 5 mA, Zo = 50 Ω)
f
MHz
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
S11
MAG
ANG
0.527
− 47.1
0.468
− 83.4
0.427 − 109
0.407 − 128
0.393 − 143
0.388 − 154
0.386 − 164
0.388 − 172
0.392 − 179
0.394
174
0.399
169
0.405
163
0.410
159
0.416
154
0.422
150
0.431
147
0.438
143
0.445
140
0.451
136
0.460
133
0.465
130
0.473
127
0.481
125
0.487
122
0.493
119
S21
MAG
ANG
10.5
149.
8.37
128.
6.63
114.
5.36
104.
4.46
96.6
3.82
90.2
3.34
84.9
2.96
80.1
2.67
75.8
2.43
71.6
2.24
68.1
2.07
64.6
1.93
61.3
1.81
58.0
1.71
54.9
1.62
52.0
1.54
49.3
1.47
46.6
1.41
44.1
1.35
41.5
1.30
39.2
1.26
36.9
1.21
34.8
1.17
32.5
1.14
30.6
NE97833 / 2SA1978
S12
MAG
0.0359
0.0584
0.0729
0.0835
0.0930
0.100
0.109
0.118
0.128
0.137
0.147
0.158
0.168
0.179
0.190
0.201
0.213
0.224
0.236
0.248
0.261
0.273
0.286
0.299
0.312
ANG
70.6
58.7
53.6
52.1
52.1
53.1
53.3
54.4
55.6
56.4
56.9
57.2
57.6
57.7
57.7
57.7
57.5
57.2
56.8
56.3
55.7
55.1
54.3
53.3
52.6
S22
MAG
ANG
0.881
− 21.1
0.716
− 34.2
0.586
− 40.9
0.503
− 44.3
0.443
− 45.8
0.401
− 46.7
0.373
− 47.7
0.351
− 49.1
0.332
− 50.1
0.319
− 51.4
0.306
− 53.2
0.298
− 54.5
0.289
− 57.0
0.280
− 59.3
0.274
− 61.2
0.267
− 64.4
0.262
− 66.7
0.259
− 70.3
0.252
− 73.6
0.247
− 76.3
0.243
− 80.2
0.239
− 84.4
0.234
− 87.2
0.235
− 91.9
0.230
− 95.9
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