Anechoic Chambers
Shielded Chambers,
Screened Rooms
& Faraday Cages
Anechoic Absorbers
Shielding materials & shielding components

Military shielded Chambers

Military shielded chambers
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The facts about... shielded buildings
progressive and so in higher frequencies where the wave becomes small then the truncated face of the absorber will inhibit (ruin) the performance of this absorber type.
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Global EMC have great experience in the installation of military RF/anechoic test chambers.


Military chambers can be for shielding only (faraday cage) or can be shielding + anechoic lining.


The two most common anechoic standards are:


  1. US standard – MIL STD 461F, the last letter denotes the revision level and so may change.
  2. UK standard – DEF STAN 59-411

The MIL STD 461 is a less stringent requirement and can be fulfilled by the use of pyramidal absorber (RAM), the DEF STAN 59-411 demands measurement accuracy below 80MHz and thus requires the use of ferrite tiles.


In the future there will be a requirement for all equipment to be ‘CE marked’ and so commercial EMC requirements will apply, a correctly designed DEF STAN 59-411 chamber will meet both military and commercial applications.


For shielding the tradition standard has been MIL STD 285 but is now obsolete, the new test standards use commercial shielding tests IEEE299.


Military applications demand a high level of shield performance from 10KHz (magnetic field) up to >18GHz and beyond (microwave)


Military chamber under construction (Moscow)


Correctly designed military test chambers can meet both EMC and military test standards and so are ‘future proof’


military shielded chambers