how to determine the matrix of the field in cst

hello
can you help me solve this problem in CST
I seek to determine the matrix of the normal electric field Ez (specifying the interval in both directions x and y with the spacing between points) in a plane parallel to my structure but I can not do it in CST

right click on "Field Monitors" in the project tree, select "New field monitor", and then E field. specify the frequency you are interested in. Run the simulation. Select "e-field (f=2.4) [1]" from "2D/3D Results"->"E-Field" in the project tree. Go to "File"->"Export"->"Plot Data (ASCII)". Choose a file name. Set the step width or the number of steps. Done!

thank you for your help

I need to determine the values ​​of the field on a definite plan, the solution you gave me does not specify the limits of the plan (for example, Xmin, Xmax Ymin and Ymax with Z fixed)

You only need to filter the resulting matrix, which can be easily done with whatever software you use to draw the vectors, e.g. with Matlab.

Hello mamali,
I have a question on the scalar plot of a special filed components, such as Ez in a plane. When i tried to plot the exported .txt data, i was confused because each data for a point contained real and image part, such as real(Ez) and im(Ez). How can i obtained the scalar plot as what in the 2D/3D field plots in MWS, and how to decide the phase of the eigenmode? Thanks in advance!

you just need to compute the magnitude and phase using the complex data:
if real(Ez)=X, and im(Ez)=Y and Ez = X + iY
|Ez| = sqrt(X^2 + Y^2)
and <Ez=arctan(Y/X)
you can ue MATLAB or excel to calculate them easily.

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