Fet with positive common gate

Hi,

May i kow the load and source reflection coefficient to satisfy for steady state oscillation conditions?

And may i know how does a diagram of transistor oscillator circuit with common gate looks like, with positive feedback?

Sorry I don't know what you're talking about, please be more descriptive.

I have got the following question:
The S paramters of a FET with a positive feedback in common gate configuration are measured at 5Ghz and have the following values:

S11 = 1.01 /_ 160 degree
S21 = 2 /_ - 33 degree
S12 = 0.3 /_ 140 degree
S22 = 1.4 /_ - 34 degree

May i kow the load and source reflection coefficient to satisfy for steady state oscillation conditions?

And may i know how does a diagram of transistor oscillator circuit with common gate looks like, with positive feedback?

Please post a schematic, you might get more help that way.

Hi,

I do not have any schematic

With S11 and S22 greater then 1 you are on your way to oscillation.

You can find info by doing some web searches for common gate oscillator.

Here is one:
https://www.electro-tech-online.com/custompdfs/2009/08/IMS2004-002513.pdf

How do you know what she'd talking about?