On Sun, Dec 8, 2013 at 9:01 PM, Bill Stewart <[email protected]> wrote: > ... > The shielding was basically plywood with sheet metal on both sides, > with special metal joints in between them and on the corners, > packed with wire mesh in the joints to plug any extra leaks, > making a nice big Faraday cage. The air vents were metal grates > an inch or two deep with zig-zaggy airflow paths, > and our data connections used fiber optics going through > waveguide holes that were about 3" long and 1/8" diameter. > Power feeds used big inductive low-pass filters.
effective attenuation of emanations above 10Ghz would be interesting. even at >5Ghz you run into trouble with the AC filer route as you mention; best practice seems to be DC batteries inside the cage :/ attenuation at high frequencies for air flow mesh less problematic; optical communication links will always be useful of course... i would be curious to see high dBm with high dBi gain emitters(antennas) worst-case testing against actual build outs at >5Ghz, as many designs aim for ~50dB attenuation with 120 (!!!) being beyond exceptional.. Teletronics makes some nice 1W 5.8Ghz amps for 802.11a which could be so purposed inexpensively. best regards,
