BFQ81 Datasheet, PDF (8/11 Pages) Siemens Semiconductor Group – NPN Silicon RF Transistor (For low-noise amplifiers up to 2GHz and broadband analog and digital applications)

BFQ81
Vishay Semiconductors
V_CE = 10 V, I_C = 10 mA, Z₀ = 50 Ω
S₁₁
j
j0.5
j2
j0.2
3.0 GHz
2.0
0
0.2 _1.0 1
-j0.2
0.3
-j0.5
13502
-j
j5
2
5
∞
-j5
0.1
-j2
Figure 6. Input Reflection Coefficient
S₂₁
90°
120°
60 °
150° ^0.1
180°
0.3
1.0
3.0 GHz ¹⁰
30°
20 0°
-150 °
13 504
-120 °
-30 °
-60 °
-90 °
Figure 7. Forward Transmission Coefficient
S₁₂
90°
120°
60°
150°
180°
3.0 GHz
2.0
1.0
0.1
0.2
30°
0.4 0°
-150°
13 503
-120°
-90 °
-30 °
-60 °
Figure 8. Reverse Transmission Coefficient
S₂₂
j
j0.5
j2
j0.2
j5
0
0.2
-j0.2
0.5 1
20.8 5
∞
0.1
3.0 GHz
-j5
-j0.5
-j2
13 505
-j
Figure 9. Output Reflection Coefficient
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Document Number 85023
Rev. 1.6, 08-Sep-08