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ABCD/Matching Circuits/Insertion Loss

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weesam
2008-05-02
2012-12-15
  • weesam
    weesam
    2008-05-02

    Sirs,
    I have the following T-circuit. Is it possible to use 2 port networks/ABCD parameters to find the matching value of RX and RLoad; and then the insertion loss?

    <Qucs Schematic 0.0.11>
    <Properties>
      <View=0,0,800,800,1,0,0>
      <Grid=10,10,1>
      <DataSet=matchingcircuit.dat>
      <DataDisplay=matchingcircuit.dpl>
      <OpenDisplay=1>
      <showFrame=0>
      <FrameText0=Title>
      <FrameText1=Drawn By:>
      <FrameText2=Date:>
      <FrameText3=Revision:>
    </Properties>
    <Symbol>
    </Symbol>
    <Components>
      <Vdc V1 1 70 220 18 -26 0 1 "1 V" 1>
      <R R2 1 300 140 -26 15 0 0 "60" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "european" 0>
      <R R5 1 340 220 15 -26 0 1 "120" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "european" 0>
      <R R3 1 390 140 -26 15 0 0 "60" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "european" 0>
      <VProbe Pr2 1 450 220 -16 28 0 3>
      <GND * 1 120 300 0 0 0 0>
      <.DC DC1 1 70 80 0 33 0 0 "26.85" 0 "0.001" 0 "1 pA" 0 "1 uV" 0 "no" 0 "150" 0 "no" 0 "none" 0 "CroutLU" 0>
      <Eqn Eqn1 1 90 360 -23 13 0 0 "insertion_loss=20*log10(Pr1.V/Pr2.V)" 1 "yes" 0>
      <VProbe Pr1 1 250 220 -16 28 0 3>
      <R RX 1 150 140 -26 15 0 0 "134.1640787" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "european" 0>
      <R MatchingLoad 1 510 220 15 -26 0 1 "134.1640787" 1 "26.85" 0 "0.0" 0 "0.0" 0 "26.85" 0 "european" 0>
    </Components>
    <Wires>
      <70 140 120 140 "" 0 0 0 "">
      <70 140 70 190 "" 0 0 0 "">
      <70 200 70 250 "" 0 0 0 "">
      <70 250 70 300 "" 0 0 0 "">
      <70 300 120 300 "" 0 0 0 "">
      <180 140 230 140 "" 0 0 0 "">
      <330 140 340 140 "" 0 0 0 "">
      <340 140 340 190 "" 0 0 0 "">
      <340 250 340 300 "" 0 0 0 "">
      <340 140 360 140 "" 0 0 0 "">
      <340 300 430 300 "" 0 0 0 "">
      <420 140 430 140 "" 0 0 0 "">
      <430 140 430 210 "" 0 0 0 "">
      <430 230 430 300 "" 0 0 0 "">
      <120 300 230 300 "" 0 0 0 "">
      <230 140 270 140 "" 0 0 0 "">
      <230 140 230 210 "" 0 0 0 "">
      <230 300 340 300 "" 0 0 0 "">
      <230 230 230 300 "" 0 0 0 "">
      <430 140 510 140 "" 0 0 0 "">
      <510 140 510 190 "" 0 0 0 "">
      <430 300 510 300 "" 0 0 0 "">
      <510 250 510 300 "" 0 0 0 "">
    </Wires>
    <Diagrams>
      <Tab 290 427 220 77 3 #c0c0c0 1 00 1 0 1 1 1 0 1 1 1 0 1 1 315 0 225 "" "" "">
        <"insertion_loss" #0000ff 0 12 1 0 0>
      </Tab>
    </Diagrams>
    <Paintings>
    </Paintings>

     
    • weesam
      weesam
      2008-05-02

      By the way, the values of RX and RLoad here are what I have put it; not what QUCS has calculated.