Hi very new to all this so bare with me.
I'm looking for the best software to create designs & CAD for inbuilding antenna systems.
I will already have building layout designs so trying to find a way to incorporate a design that could show antenna coverage, add cable routes etc..
As I say I'm very new to this and would really appreciate any advice people have.
Thank you in advance

You could probably do it using plain AutoCAD but it might be easier with something like AutoCAD MEP.