BFQ81 Datasheet, PDF (3/11 Pages) Siemens Semiconductor Group – NPN Silicon RF Transistor (For low-noise amplifiers up to 2GHz and broadband analog and digital applications)

Common Emitter S-Parameters
Z₀ = 50 Ω, T_amb = 25 °C, unless otherwise specified
V_CE/V
I_C/mA
f/MHz
S11
LIN
ANG
MAG
deg
1
2
100
0.868
-29.7
300
0.681
-77.6
500
0.565
-109.5
800
0.491
-142.9
1000
0.478
-157.7
1200
0.472
-171.0
1500
0.480
173.1
1800
0.491
159.5
2000
0.506
151.7
2200
0.523
144.4
2500
0.554
133.5
2800
0.573
123.9
3000
0.600
117.4
3
2
100
0.882
-24.8
300
0.709
-66.7
500
0.577
-97.2
800
0.477
-130.9
1000
0.450
-147.3
1200
0.432
-162.0
1500
0.433
179.7
1800
0.445
164.6
2000
0.459
156.0
2200
0.471
147.7
2500
0.501
136.4
2800
0.521
126.5
3000
0.543
119.1
3
5
100
0.741
-38.2
300
0.497
-91.6
500
0.386
-122.9
800
0.332
-153.1
1000
0.324
-166.2
1200
0.323
-178.8
1500
0.333
167.3
1800
0.352
155.1
2000
0.367
147.8
2200
0.381
140.3
2500
0.414
131.2
2800
0.434
123.0
3000
0.459
116.9
6
2
100
0.887
-23.2
S21
LIN
MAG
ANG
deg
6.78
157.2
5.08
125.2
3.77
106.3
2.67
87.8
2.25
79.1
1.94
71.1
1.64
60.8
1.42
51.7
1.32
46.8
1.23
42.1
1.13
35.3
1.04
29.4
0.97
26.3
6.74
160.3
5.32
130.7
4.09
111.8
2.96
93.2
2.50
84.6
2.16
76.5
1.83
66.4
1.58
57.5
1.45
52.6
1.36
48.1
1.24
41.2
1.14
35.1
1.07
32.2
13.66
150.6
8.67
116.8
5.90
100.7
3.94
86.1
3.26
79.4
2.77
72.9
2.30
64.6
1.98
56.8
1.82
52.5
1.69
48.5
1.54
42.3
1.41
36.4
1.32
33.2
6.76
161.2
BFQ81
Vishay Semiconductors
S12
LIN
MAG
ANG
deg
0.045
72.3
0.098
50.7
0.120
42.0
0.136
39.4
0.144
40.4
0.152
42.6
0.168
46.6
0.189
50.6
0.208
52.6
0.228
53.8
0.262
54.3
0.294
53.7
0.315
53.0
0.032
74.9
0.073
55.2
0.092
46.8
0.106
44.4
0.113
46.0
0.120
48.6
0.134
53.8
0.153
58.9
0.169
61.4
0.188
63.3
0.220
64.8
0.252
65.0
0.275
64.5
0.028
70.6
0.056
56.0
0.072
55.6
0.095
59.4
0.112
61.5
0.130
62.6
0.156
63.8
0.186
63.9
0.206
63.4
0.227
62.8
0.256
61.4
0.284
59.8
0.303
58.8
0.026
76.4
S22
LIN
MAG
ANG
deg
0.939
-14.2
0.720
-30.3
0.576
-35.3
0.477
-37.3
0.447
-38.7
0.424
-40.8
0.399
-45.0
0.381
-50.4
0.368
-54.5
0.355
-59.0
0.340
-67.3
0.316
-76.1
0.305
-81.9
0.958
-10.0
0.798
-22.2
0.680
-26.0
0.593
-27.9
0.569
-29.2
0.551
-30.9
0.531
-34.4
0.519
-38.5
0.511
-41.8
0.502
-45.2
0.495
-51.5
0.478
-58.3
0.471
-63.1
0.890
-17.2
0.619
-28.6
0.504
-27.5
0.451
-25.3
0.439
-25.4
0.433
-26.6
0.422
-29.7
0.413
-33.7
0.406
-36.6
0.398
-39.8
0.389
-45.7
0.372
-52.0
0.364
-56.7
0.966
-8.3
Document Number 85023
Rev. 1.6, 08-Sep-08
www.vishay.com
3