problem meshing an antenna w/multiple dielectric/metal layers

I am trying to design a wide slot antenna fed by a microstrip line using an standard FR4 board suspended over a ground plane. Using the attached code, I get this error: "Struct contents reference from a non-struct array object". Any hint to fix it?

[JOSE LUIS RODRIGUEZ]

There is a bug in the code. The feed location should be

>> p.FeedLocations = [0,-gndWidth/2,1,3];

i.e, a coax feed model between both faces of the board. Nevertheless, the problem remains after this fix.

Answer 1

[JOSE LUIS RODRIGUEZ]

This is a self-answer!

My model was derived from an example given by Mathworks (https://www.mathworks.com/help/antenna/examples/design-analysis-and-prototyping-of-a-microstrip-fed-wide-slot-antenna.html). That example fail to run in Matlab 2017b. The problem is fixed by switching to 2018a.

BTW: the data of my script is not tuned for any frequency, so do not expect any valuable result if you run the code!