Hello everyone, I have a very tough question about S parameters of the transistor. How to measure the parameters S11, S12, S21 and S22 of the transistor.
Thanks guys so much

 

I would use a Vector Network Analyzer. Problem is, they cost as much as a small house or a large vehicle.

 

I would use a Vector Network Analyzer. Problem is, they cost as much as a small house or a large vehicle.

coukd you better explain measurement principles ? I suppose with vector network analyzer

 

A VNA with an s-parameter test set is programmed to stimulate a device under test and measure the transmitted and reflected reflected signals. In the setup we had, a transistor was put on a jig designed for this purpose, connected to the unit, and the data was collected and displayed on a Smith Chart or other graphical displays such as return loss.

Here is where I would start for getting a handle on how things are measured.

https://en.wikipedia.org/wiki/Scattering_parameters
http://www.keysight.com/en/pc-1000003159:epsg:pgr/discontinued-s-parameter-test-sets?cc=US&lc=eng

 

A VNA with an s-parameter test set is programmed to stimulate a device under test and measure the transmitted and reflected reflected signals. In the setup we had, a transistor was put on a jig designed for this purpose, connected to the unit, and the data was collected and displayed on a Smith Chart or other graphical displays such as return loss.

Here is where I would start for getting a handle on how things are measured.

https://en.wikipedia.org/wiki/Scattering_parameters
http://www.keysight.com/en/pc-1000003159:epsggr/discontinued-s-parameter-test-sets?cc=US&lc=eng

thank u so much