comsol multiphysics 3.4 project

josobcn

Hello, i'm a telecomunications student. I am new here and I have some doubts with Comsol software.
This is the first time I use Comsol, and I want to simulate the comunication between two antennas inside a tank with 2 different matterial, air and corn(wheat). I have the electric constants of both inside materials and the tank material.
I don't know how create a cylinder tank filled with two type of materials (half and half) and the 2 antenas inside it.
Please, somebody knows how can I start this work?

Thank you!

josobcn