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Nelder-Mead-Algorithm

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seackone

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Hi,

I measured a blackbox at one frequency and many different states (with a network analyzer). With the resulting S-Parameters (for every single state), i can describe this blackbox. The parameters of interest are only the input reflections (S11). Here is an example of the measurements - plotted in a smith chart:

https://www.mksinst.com/images/MW-3513-smithchart-01.gif

Every single point is a complex value with a real -and imaginary part.

Now, I want to get the maximum output power of the blackbox for the measured states.. I have more than 3000 values and i dont want to measure at every single state to find the maximum output power, so i want to use the nelder mead method.

I think that i understand the method and have an idea, how to implement them for an automatic measurement system. My only problem is to find the 3 start values. My guess is, that it does no matter which values I choose, because at the beginning of the first triangle, the algorithm is looking in every direction to find the value with maximum output power of the blackbox. Is it right? I would prefer to start with the minum and maximum of the absolute imaginary part and maybe the half of both for the third point. Or are there better suggestions?

Regards
 

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