# ozuem

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22

1. ## MoM matrix and eigencurrent

Also to mention that solving the eigenproblem does not give me the same lambda as outputted from feko
2. ## MoM matrix and eigencurrent

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.
3. ## MoM matrix and eigencurrent

This statement is confusing me. What is the difference between the eigen-current and the solution of the matrix problem. Please I would love clarification
4. ## MoM matrix and eigencurrent

I am so grateful for your continuous support. I still have questions as I continue to use FEKO and I hope you don't mind. Please, I want to know if it is possible to get the information of the external edges. I also want to confirm that the values given for the current density vector on the triangle is for the triangle centre or for the whole triangle?
5. ## MoM matrix and eigencurrent

okay i got it. It id (b) not where b is for block number
6. ## MoM matrix and eigencurrent

Please can you send me an example of the syntax
7. ## MoM matrix and eigencurrent

Okay. Thanks for you support. Now a question about the MoM matrix. How can the matrix of the other frequency be exported because it seems only the MoM of the first frequency of analysis is made available when you check the .mat file
8. ## MoM matrix and eigencurrent

But I am also concerned about the issue of modal tracking. I really do not intend to solve this equation from scratch.
9. ## MoM matrix and eigencurrent

Okay. Thank you

11. ## MoM matrix and eigencurrent

Thanks @ Wilco. Any function to perform this on MATLAB?
12. ## MoM matrix and eigencurrent

I am so grateful to you RenierM, I guess my knowledge in the use of FEKO has been broadened and my knowledge has been increased even though I am still getting to learn a lot by the day. However, is there any formula I can use to get the current on the edge
13. ## MoM matrix and eigencurrent

Also @ ReinerM, i have no access to the str file. Anyway i could go around this?
14. ## MoM matrix and eigencurrent

Ok @ RenierM, thank you so much so confirm that eigen current can be referred to as the eigen vector?
15. ## MoM matrix and eigencurrent

Please I need a quick assistance because I am stuck on one problem of using FEKO for some months. I am able to extract the MoM impedance matrix, I have access to the .out file as well but then I need to get the current at the edges since my MoM matrix is given for the edges. Any idea on how to go about this? I will appreciate a quick and fast response. Thank you.
16. ## MoM matrix and eigencurrent

@RenierM, any idea on how to get the current for the edges from the data provided by postfeko?

18. ## MoM matrix and eigencurrent

Thank you so much at RenierM but at this point, the MoM matrix does not match the eigen-current vector hence the X of the MoM cannot multiply the eigen-current if you understand my worry. May be there is a way I can match this. Hope to hear from you soon.
19. ## MoM matrix and eigencurrent

It was not from the manual I got my confusion, its from the display message when running the FEKO solver but it is clearer now
20. ## MoM matrix and eigencurrent

Okay. Thank you very much, you really cleared my doubts. I am so much grateful for this. I have had this confusion for a while. One more question which I think I did not state is the eigen-current part. Is the eigen-current now the same as surface current or the current vector. I am referring in context of calculating the Q factor of an antenna where I need to multiply the eigen-current by the imaginary part of the impedance. Hope to hear from you soon. Thank you.
21. ## Eigenvectors in the Characteristic Mode Analysis

From my exchange with FEKO, this seems unavailable on FEKO but hopefully someone from their support can clarify
22. ## MoM matrix and eigencurrent

Hello, I would need some clarification to enable me understand what I am doing on FEKO. I am relatively new to using FEKO but I am having a hard time understanding some terminology. 1. What is the difference between MoM matrix and MoM impedance matrix. If there is a difference, how to I obtain the MoM impedance matrix on FEKO else I guess they are both the same. 2. What is the major difference between the surface current, current density vector and eigen-current. How do I obtain the eigen current on FEKO 3. The MoM matrix does not tend to match in terms of dimension with the current density vector on FEKO, how can I reconcile this
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