How Do You Model Voltage in a Microwave Structure Using Finite Element Method?

[vptran84]

Hi,

I was given this problem, but i just don't know where to start, i looked through numerous websites, and 3 books as reference, but i can't find anything that is related to this problem. Any help would be appreciated.

here is the problem:

A microwave structure has the cross section shown in the figure below. The
outside tube is grounded and the center conductor is at V = 10V. Use the finite element method to solve for the voltage V in the space between the conductors.(Assume that the length is very long.) There is a picture that goes with this problem, but i don't know how to load it. So I am going to describe it. There is a small square inside a rectangle. the small square is the center conductor, and the rectangle represents the outside tube that is grounded. the length and width of the small square inside is A=2mm, and the width of the outside rectangle is B=8mm, and the length of the outside rectangle is C=10mm.

I really need help on how to start this problem, please help. thank you

 

[Astronuc]

Do you have an example of Maxwell's equations (integral form for FE) for the geometry of which you describe?

Try to find a book like this - Volakis, J. L., Chatterjee, A. and Kempel, L. C.
Finite Element Method for Electromagnetics: Antennas, Microwave Circuits, and Scattering Applications
IEEE Press and Oxford University Press, New York, 1998, 368 pp.

Assign the appropriate potential/charge to the small square block.

Do you have a text on electromagnetics or microwave cavities/magnetrons?

 

[vptran84]

hi,

i figured out how to do this problem using excel...it only took me 2 hours LOL, but i finally figured it out.

Thank you for your comment...i will try to look for the particular book...the only textbook that I am using rite now is Fundamentals of Engineering Electromagnetics by David K. Cheng.