2SA1978 Datasheet, PDF (7/10 Pages) NEC – PNP EPITAXIAL SILICON TRANSISTOR MICROWAVE AMPLIFIER

S-PARAMETER
(VCE = 3 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
0.558
− 37.1
0.485
− 67.9
0.423
− 92.5
0.381 − 111
0.353 − 127
0.339 − 140
0.329 − 151
0.325 − 160
0.325 − 169
0.326 − 176
0.330
177
0.335
170
0.339
165
0.345
160
0.351
155
0.360
151
0.366
147
0.374
143
0.382
140
0.390
137
0.396
133
0.404
130
0.413
127
0.418
125
0.427
122
S21
MAG
ANG
11.0
153.
9.13
133.
7.48
119.
6.21
109.
5.18
101.
4.47
95.1
3.92
89.9
3.48
84.9
3.14
80.7
2.87
76.9
2.64
73.0
2.44
69.6
2.28
66.5
2.13
63.3
2.01
60.2
1.90
57.4
1.81
54.6
1.72
52.0
1.65
49.5
1.58
47.0
1.52
44.6
1.46
42.4
1.41
40.2
1.36
38.0
1.32
35.9
NE97833 / 2SA1978
S12
MAG
0.0288
0.0467
0.0611
0.0703
0.0801
0.0880
0.0938
0.104
0.113
0.122
0.131
0.140
0.150
0.160
0.170
0.181
0.191
0.202
0.213
0.223
0.233
0.243
0.251
0.273
0.255
ANG
74.3
83.0
58.1
56.5
56.1
56.7
57.5
57.9
58.7
59.5
60.5
61.2
61.3
61.9
61.9
61.8
61.8
61.7
61.3
61.0
60.4
60.2
59.4
58.9
58.2
S22
MAG
ANG
915
− 16.3
784
− 27.0
670
− 33.0
590
− 36.0
531
− 37.4
490
− 38.1
461
− 33.8
438
− 39.8
419
− 40.4
408
− 41.6
393
− 42.8
386
− 44.0
377
− 45.9
366
− 47.5
362
− 49.0
354
− 51.0
349
− 53.0
344
− 55.5
337
− 58.1
334
− 60.4
328
− 63.0
321
− 65.9
318
− 68.3
314
− 72.1
303
− 74.8
7