2SA1978 Datasheet, PDF (9/10 Pages) NEC – PNP EPITAXIAL SILICON TRANSISTOR MICROWAVE AMPLIFIER

S-PARAMETER
(V_CE = 10 V, I_C = 15 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
0.354
− 46.6
0.290
− 81.8
0.247 − 107
0.226 − 126
0.215 − 141
0.210 − 154
0.208 − 164
0.211 − 172
0.215
179
0.218
172
0.225
166
0.232
160
0.237
156
0.244
151
0.251
147
0.261
143
0.268
140
0.276
137
0.284
134
0.292
131
0.299
128
0.308
125
0.317
123
0.324
121
0.332
119
S21
MAG
ANG
17.87
147.
13.45
125.
10.35
113.
8.294 104.
6.799
97.8
5.805
92.4
5.050
88.1
4.475
84.1
4.008
80.5
3.647
77.2
3.345
74.2
3.086
71.1
2.871
68.4
2.685
65.7
2.532
63.2
2.392
60.5
2.265
58.2
2.155
55.7
2.059
53.5
1.974
51.1
1.897
49.0
1.826
46.9
1.763
44.7
1.697
42.7
1.646
40.7
NE97833 / 2SA1978
S12
MAG
0.0190
0.0317
0.0420
0.0518
0.0626
0.0720
0.0820
0.0919
0.102
0.112
0.121
0.133
0.143
0.153
0.165
0.174
0.185
0.196
0.207
0.219
0.230
0.242
0.252
0.264
0.276
ANG
74.6
70.0
68.4
68.3
69.8
70.8
71.0
70.9
70.9
70.7
70.9
70.3
70.2
69.7
69.2
68.7
68.0
67.3
66.5
65.8
65.1
64.2
63.3
62.4
61.5
S22
MAG
ANG
866
− 18.3
708
− 26.9
601
− 29.8
539
− 30.5
497
− 30.2
470
− 30.1
450
− 30.2
435
− 30.6
423
− 31.1
415
− 32.2
405
− 32.9
400
− 34.2
394
− 35.7
386
− 36.8
381
− 38.4
376
− 39.9
373
− 41.6
366
− 43.7
360
− 45.7
356
− 47.5
350
− 49.7
345
− 51.8
341
− 53.8
337
− 56.7
331
− 58.8
9