Hi everyone,
We are working on a RF bluetooth product, the first proposed design for the case was some kind of Aluminum cylinder, I think this design will create a lot of troubles since the RF antenna will be printed on the PCB and the Al case will act like a shield for electromagnetic waves.

Is putting a big enough cavity on the design helpful to avoid such problems ? and what are the best suited simulation softwares to use for simulating the case effect (if there is a free software it will be great).

Thank you for your help