MoM matrix and eigencurrent
Answers
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They are both [Nx1] vectors of basis function coefficients that describe a surface current density.
An eigencurrent vector is one of N possible solution vectors to an eigenproblem. The solution to the MoM matrix problem is a single current vector that describes the currents as excited by the sources present in the problem.0 -
Wilcon thanks so much for you continuous patience with me. I am tying to really understand this subject as I find it interesting. Okay taking the MoM matrix and solving the eigenproblem of XI = lambdaRI should give me lambda and I which is the eigenvector?
The MoM matrix problem is just one current vector non-withstanding the mode? I am still lost in figuring out the difference betwen eigencurrent vector and solution to the MoM matrix problem. Because I am thinking they are both the same just different as per mode of analysis. Please help me clarify and if there is an opportunity to have a private chat or conversation, I also would not mind. Thank you.
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Also to mention that solving the eigenproblem does not give me the same lambda as outputted from feko
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...solving the eigenproblem of XI = lambdaRI should give me lambda and I which is the eigenvector?
Correct.
Also to mention that solving the eigenproblem does not give me the same lambda as outputted from feko
Are you sorting your modes. FEKO will report eigenvalues with the smallest magnitude (most significant) up until the number of requested modes.
...the difference betwen eigencurrent vector and solution to the MoM matrix problem
To use your syntax from above, with Z = R + jX, and V the source (or driving vector), the MoM matrix problem is:
ZI = V
I suggest perhaps doing a study of the different CEM methods before delving too deeply into Characteristic Mode theory.
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Hello,
I'm getting started to use FEKO. I want to extract matrixes from feko in order to do some calculations in matlab. Here; since generating the feko file I obtain a set of 6 matrixes - f1.mat.0; f1.mat.1........f1.mat.5 . So I want to know why I am obtaining those files and what does they contain....
<?xml version="1.0" encoding="UTF-8"?>
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Hi,
The number of matrix files written out is equal to the number of processes used for parallel runs (I assume this was a parallel run with 6 processes).
Please look at the documentation for an explanation of the file format.
Search for 'Read MAT, LUD, RHS and STR Files'.
Regards,
Renier
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Altair Forum User said:
It seems the link to download the utilities is invalid now. It always lead to https://altairhyperworks.com/product/FEKO.
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The std2ascii file is now part of the installation (see the description in the link below):
https://community.altair.com/community?id=community_question&sys_id=f2868c3a1b2bd0908017dc61ec4bcb540 -
Altair Forum User said:
Hi,Renier, since our university buy FEKO last year, the altair company give us an 2017 edition. So could u provide those exe here? Thanks.
https://community.altair.com/community?id=community_question&sys_id=f2868c3a1b2bd0908017dc61ec4bcb540 -
Hi XuWang,
I have attached the utility below.
Regards,
Renier
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Hi
I started using FEKO 2018 student version. I nedd to know the order of the RWG bases..I mean how they are related to triangles? Can anyone please help? Thank you.
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Altair Employee