FT82-43 Inductor

  • 4 dB Attenuator added for 50 Ohm Load.
  • S11 Calibration plane at inductor connection.
  • Magnetizing Admittance trace, computed from Fair-Rite Permeability tables.
  • S21 - MML trace, MML is S11 computed mismatch loss.

FT82-43 3T

Inductance at initial permeability = 4.25 uH

FT82-43-3T-coil-S11.s1p
FT82-43-3T-coil-S21.s1p

FT82-43 3T:3T Transformer



FT82-43 7T

Inductance at initial permeability = 22.17 uH

FT82-43-7T-coil-S11.s1p
FT82-43-7T-coil-S21.s1p

FT82-43 7T:7T Transformer with Compensation

Capacitor adjusted for match at 30 MHz

Spot Check Using S11 Test Bench

  • 50Ω dB = 10 * Log10(0.02 / (1/R|| + 0.02))
MHzR||dBPlot Above
0.53379.14-0.064-0.05~+
41056.52-0.20-0.18~
301624.43-0.13-0.12~

SimSmith Model FT82-43 3T

FT82-43 7T:7T SimSmith Transformer Model

VNWA Files: FT82-43-7T-7T.s1p ft114-43-7t-S21.txt

equ Block D1 Cut and Paste 
//Ferrite 43
data=file[];
$mup = data.R;
$mupp = data.X;
$Ls = H * ($mup/mui);
$Xs = 6.2831853 * G.MHz * 1000000 * $Ls;
$Q = $mup / $mupp;
$Rs = $Xs / $Q;
$Z = $Rs + j * $Xs;
$Y = 1/$Z;
$ReY = Real($Y);
Rp = 1/$ReY;
$LReY = 1/L.ohms;
$floss = $LReY / ($LReY + $ReY);
FlossdB = 10*Log10($floss);
Plot(FlossdB);

B.Hr = B.Hl = H

Improved equ Block D1 Cut and Paste 
//Ferrite
data=file[];
$mup = data.R;
$mupp = data.X;
$Ls = H * ($mup/mui);
$Xs = 2*Pi * G.MHz * 1M * $Ls;
$Q = $mup / $mupp;
$Rs = $Xs / $Q;
Rp = ($Q^2 + 1) * $Rs;
$ReY = 1/Rp;
$LReY = 1/L.ohms;
$floss = $LReY / ($LReY + $ReY);
FlossdB = 10*Log10($floss);
Plot(FlossdB);

B.Hr = B.Hl = H