Where can I get some article about ferrite in EMC suppress

Where can I get some article about ferrite in EMC suppress, I need used some ferrite in my design to suppress the radiation from 30~300MHz, especially in 30~40MHz and 247MHz around
thanks!

you can visit websites of fair-rite and steward,they give good info on ferrites.

sb

can ferrite be used to suppress radiation ? do you want ferrite or absorbing material ?