Calculateur de Polarisation de Transistor
Calculez les résistances de polarisation d'un transistor.
Ω
Ω
MHz
Network Q
1.732
Series Reactance86.60 Ω
Shunt Reactance115.47 Ω
Network Q vs Source Impedance
Formule
## 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.
Exemple Résolu
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
Questions Fréquentes
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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