shield can design

Hi,

Instead of just a fully closed metal shield box, is there any more advance technique to further improve the isolation? should it be frequency dependent? target freq. range is 1G to 12G. Any app. notes or simulation background on that?

Thanks,
KC_O_o

You can coat the inside of the shield with absorbing material that is usually ferrite material with a high loss tangent with a rubbery binder.

For desktop computer casing or microwave oven front shielding, holes are usually punched on the metal plate, would it affect something?

On similar matter, have a look at these materials used in the GHz range shielding:
http://www.emf-meter.com/Shielding.htm

Regards,
IanP