2SA1978 Datasheet, PDF (8/10 Pages) NEC – PNP EPITAXIAL SILICON TRANSISTOR MICROWAVE AMPLIFIER

S-PARAMETER
(VCE = 10 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
0.529
− 28.8
0.548
− 53.5
0.463
− 73.9
0.400
− 91.4
0.349 − 106
0.316 − 119
0.292 − 131
0.277 − 141
0.267 − 152
0.261 − 160
0.259 − 169
0.260 − 177
0.263
176
0.267
169
0.272
164
0.280
159
0.286
154
0.293
149
0.300
145
0.308
141
0.315
138
0.325
134
0.333
131
0.341
128
0.348
125
S21
MAG
ANG
11.3
156.
9.70
138.
8.20
124.
6.94
114.
5.86
106.
5.09
100.
4.49
94.6
4.00
89.7
3.63
85.4
3.31
81.5
3.04
77.9
2.82
74.5
2.63
71.3
2.46
68.2
2.32
65.3
2.20
62.5
2.09
59.8
1.99
57.3
1.90
54.8
1.82
52.3
1.75
49.9
1.68
47.6
1.63
45.5
1.57
43.3
1.52
41.2
NE97833 / 2SA1978
S12
MAG
0.0234
0.0412
0.0530
0.0620
0.0712
0.0793
0.0860
0.0938
0.101
0.109
0.117
0.125
0.133
0.143
0.152
0.161
0.171
0.191
0.192
0.201
0.212
0.223
0.235
0.246
0.258
ANG
75.4
67.4
62.1
59.7
58.9
59.8
59.6
60.4
61.3
61.9
62.8
63.2
63.9
64.4
64.5
64.6
64.9
64.8
64.4
64.5
63.9
63.8
63.2
62.7
62.1
S22
MAG
ANG
0.939 − 12.8
0.836 − 21.7
0.739 − 27.2
0.666 − 29.9
0.608 − 31.4
0.567 − 31.9
0.539 − 32.7
0.516 − 33.5
0.498 − 34.2
0.485 − 35.1
0.472 − 35.9
0.463 − 36.9
0.455 − 38.4
0.448 − 39.5
0.440 − 40.8
0.434 − 42.5
0.428 − 44.1
0.423 − 46.0
0.417 − 47.8
0.413 − 49.7
0.408 − 51.9
0.402 − 54.3
0.397 − 56.1
0.395 − 58.7
0.388 − 61.0
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