Interactive L-Network Calculator
L-Network Matching Network Design
| Design Q | — |
| Approximate −10 dB BW | — |
| Topology A (shunt first) | |
| Shunt C (at R_s side) | — |
| Series L (at R_L side) | — |
| Topology B (series first) | |
| Series L (at R_s side) | — |
| Shunt C (at R_L side) | — |
Design Formulas
Q = √(R_high/R_low − 1) [min Q for given impedance ratio]
For R_L < R_s (step-down, shunt element at source):
X_shunt = R_s / Q [capacitive: shunt C at R_s port]
X_series = Q · R_L [inductive: series L at R_L port]
For R_L > R_s (step-up, shunt element at load):
X_shunt = R_L / Q [capacitive: shunt C at R_L port]
X_series = Q · R_s [inductive: series L at R_s port]
Component values at frequency f:
L = X_L / (2π·f)
C = 1 / (2π·f·X_C)
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