Z → R, L, C for Qucs-S

Complex impedance at frequency f → real components, Smith chart and a ready-to-use netlist

Input

Paste the datasheet string as is: R ± jX, “j” before or after the number, comma or dot as decimal separator.
Suffixes k, M (meg), G, T; “Hz” is optional.
Used for the Smith chart, Γ and VSWR.
Formulas and shortcuts
Series equivalent: L = X/(2πf) for X > 0, C = 1/(2πf·|X|) for X < 0. Parallel: Rp = (R²+X²)/R, Xp = (R²+X²)/X. Γ = (Z − Z₀)/(Z + Z₀). The values are equivalent to the impedance at frequency f only. ↑ ↓ in the R, X, f, Z₀ fields step the value by 1 % (10 % with Shift).
Z = 50 + j35 Ω @ 1 GHz —
PartExact valueNearest E24Copy
R1——
L1——

ngspice / Qucs-S netlist


      

    


    

        
Match relative to Z₀

        

          
          

            
z = Z / Z₀
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Γ
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|Γ|
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VSWR
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Return loss
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Mismatch loss
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