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NAME

data:twoport-YtoS - convert Y-parameters to S-parameters (Decida Procedure)

USAGE

          data:twoport-YtoS d {R0 50}

ARGUMENTS

d data object with 2-port parameter columns: RE(y11) IM(y11) RE(y12) IM(y12) RE(y21) IM(y21) RE(y22) IM(y22)
R0 Normal impedance. (default is 50 ohms).

RESULTS

The following data columns are formed: RE(s11) IM(s11) RE(s12) IM(s12) RE(s21) IM(s21) RE(s22) IM(s22), where 
               yo  =  1/R0
               x   =   y11*y22-y12*y21
               den = -1/[(yo+y11)*(yo+y22)-y12*y21]  = -1/[x+yo*(yo+y11+y22)]
               s11 = -[(yo-y11)*(yo+y22)+y12*y21]*den = [x-yo*(yo-y11+y22)]*den
               s22 = -[(yo+y11)*(yo-y22)+y12*y21]*den = [x-yo*(yo+y11-y22)]*den
               s12 =  [2*y12*yo]*den
               s21 =  [2*y21*yo]*den

AUTHOR

Richard Booth

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