晶体管偏置计算器
计算晶体管放大电路的偏置电阻值。
Ω
Ω
MHz
Network Q
1.732
Series Reactance86.60 Ω
Shunt Reactance115.47 Ω
Network Q vs Source Impedance
公式
## L-Network Impedance Matching **Q = sqrt(R_high/R_low - 1)** **X_series = Q x R_low** **X_shunt = R_high / Q** Choose series inductor + shunt capacitor, or vice versa, to realize the reactance values at the operating frequency.
计算示例
Match 50 ohms to 200 ohms at 100 MHz.
- 01Q = sqrt(200/50 - 1) = sqrt(3) = 1.732
- 02X_series = 1.732 x 50 = 86.6 ohms
- 03X_shunt = 200 / 1.732 = 115.5 ohms
常见问题
Why match impedance?
Impedance matching maximizes power transfer and minimizes reflections in RF systems.
What is an L-network?
The simplest matching network: one series and one shunt reactive element.
Can it match any impedance?
An L-network can match any two resistive impedances. Complex impedances require additional elements or a different topology.
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