I can't find out any design issue in your post.
Your questions are no more than usage of very specific vendor's tool.
Please post to Simulator's Board not Design's Board.
DoYouLinux wrote on Jan 20th, 2010, 4:17am:In a documentation of doing load-pull test,
it suggested that we can use a PortAdapter to plot constant power contours (in Gamma_L plane)
and at the same time, we can plot input reflection coefficient (seen by input port) on this Gamma_L plane.
By doing this we can compromise between max output power and input matching quality.
This is not "input reflection coefficient" of your Power Amplifier.
Is there truely a description of "
By doing this we can compromise between max output power and input matching quality" in documentation ?
DoYouLinux wrote on Jan 20th, 2010, 4:17am:Is it possible to plot constant output power contours and at the same time,
plotting output reflection seen by load, so that we can compromise between max. output power and matching quality at the load side ????
I think it is not easy if you use Cadence Spectre and "PortAdapter".
Here "PortAdapter" is not lossless.
But if you use other tools such as Agilent ADSsim or GoldenGate, you can easily do.
If you want to judge stability by K-factor under large signal operation, do LSSP or small signal S-parameter analysis subjected to master large signal steady state analysis with sweeping complex value impedance of ports.
Again see
http://www.designers-guide.org/Forum/YaBB.pl?num=1239997125As another method, use interstage impedance probe with small signal analysis subjected to master large signal steady state analysis.
This mehod can be applicable even in Cadence Spectre and "PortAdapter".
http://www.designers-guide.org/Forum/YaBB.pl?num=1049348496http://www.designers-guide.org/Forum/YaBB.pl?num=1218635777/5#5http://www.designers-guide.org/Forum/YaBB.pl?num=1240334878/10#10If your concenrs are stability in linear operation, SP-analysis or PSS/PSP analysis with Ocean function, lsb() might be useful for your purpose. Here "lsb()" is a function for Load Stability Circle.
Note : Even if you use PSS/PSP, you can't consider nonlinear effects caused by complex load impedance, because steady state operation point is determined for fixed resistance value of port, e.g. 50Ohm.