I have tried to achieve Sdd11 by using the formula (Sdd11 = 0.5(S11-S21-S12+S22)), but not getting results, proposed by the authors in several published papers.
Can some tell me the exact process to achieve this property in antenna.
Thanking to all the respected one in advance.
Can you describe your problem in more detail? Is it difficult to get the results you need, or are you unable to get them in the CST with the postprocessing tool?
I did not calculate it in CST but can easily do it with any math tools. You can find a well-checked equation in my old paper: S.Belkin. IEEE Microwave Magazine. December 2006. Pages 85-99. The reflection coefficient in numerical format can be found with equation (19) on page 97, and an example of the MathCAD worksheet is shown on page 98.
In my view the solution is very simple. You may use postprocessing tool in CST. The right order is in attachment. Hope this can be helpful.
please can you help me? how can l measured S11, S12, S13,S21, S22, S23....S33 ? how can l do that in CST program to find amplitude and phase excitation???
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