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Transistor S-parameter.

Discussion in 'Electronic Design' started by sinlip, Nov 25, 2003.

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  1. sinlip

    sinlip Guest

    How do I measure the S-paramter on a transistor if the manufacturing
    doesn't provide the S-parameter data? First, we have to bias the
    transistor and terminate it with 50 ohm resistor on both input and
    output. Then measure it with Network Analyzer. Am I correct? Anyone
    know how the manufacure of the transistor measure the S-parameter
    data?

    Sin Lip
     
  2. You might have heard of a company called Agilent. :) They make
    equipment that measure the S-parameter data the way you described.

    The HP8510 is a classic example.

    Here are some more contemporary devices:
    http://we.home.agilent.com/cgi-bin/bvpub/agilent/Product/cp_Product.jsp?NAV_ID=-11920.0.00
    http://we.home.agilent.com/cgi-bin/bvpub/agilent/Product/cp_Product.jsp?NAV_ID=-536889724.0.00
    http://we.home.agilent.com/cgi-bin/bvpub/agilent/Product/cp_Product.jsp?NAV_ID=-11919.0.00

    You may also need to use a "bias-T" to provide DC bias to the
    transistor. Many network analyzers have one built-in on each port.

    Regards,
    Allan.
     
  3. Baphomet

    Baphomet Guest

    Parameter conversion table
    http://www.rfcafe.com/references/electrical/s-h-y-z.htm
     
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