Hello,
I would like to apologize for this question since I am quite it's a recurring question...
I design an antenna (J-dipole) using Momentum: results are great...
However, I would like to check the simulation with FEM to take account of finite FR4 substrate...
1) with the default options, results with FEM are odd: the question is how to set the FEM properly? I read from documentation and it is not very clear...
2) one FEM siting will work, how to "cut" the substrate ? With 3D visualisation tool, the FR4 layer is always the same size of simulation_box...
Thanks for your reply.
F.
Have you set enough spacing to the simulation boundary, and open boundaries?
I think you can use the "boundary area layer" setting to specify a layer that determines the substrate boundary for FEM.
Myself, I use this method: For finite dielectrics, I specify air for the base dielectric at that layer, and insert a dielectric via that represents the PCB material.