I have several insulation materials (plates, films and alike). I want to measure the complex permitivitty of these materials (Capacitance and tan delta).
The problem/question is: I did not find any works with these type of material at frequencies of 60Hz up to 10MHz, just 100MHz or more.
I have some documents that shows what is needed to do (generics), but the process is too much sensitive and I really would to know about similar works.
I do not know how to specify an equipment to measure this. Anyone have knowledge in this topic or know about published works that can help with this?