Transistor S-parameter.

[sinlip]

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

 

[Allan Herriman]

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?

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.

 

[Baphomet]

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

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