Faraday Cages have other names: RF/EMI Shielded Room or Chamber and RF/EMI Screened room or chamber.
A Faraday Cage is an electrically conductive volume and can be any size or shape.
The basic principal is that radiated electromagnetic waves (magnetic wave/radio wave/microwave) hit the Faraday Cage and flow around the outside in conducted micro-energies.
Any door or electrical/data input or air panel or other intrusion must be properly engineered in accordance with Faraday Cage shielding engineering principals.
The performance of a chamber is rated in dB’s of signal loss where: -40dB=-10:1, 60dB=1,000:1, -80dB=10,000 and 100dB=100,000:1 and so on…
The frequency range of a non-special faraday cage is 10KHz to 40GHz but can go higher and lower, example: DC and 50Hz applications.
RF/EMI Faraday Cages - Global EMC
Advantages of the Global EMC Faraday Cage Shielding System:
Ultra high shielding performance as standard, more than -100dB~120dB even in microwave.
The size is unlimited from a small bench top units up to Aircraft hangar sized shielded facilities.
Global EMC offer a full range of options: single/double sliding doors with entry ramps, ventilation/cooling systems, single & 3 phase AC/DC/data filters, over fibre data systems, turntable systems etc.
All door systems are very easy operation (see Youtube link) the mechanism have near zero friction and are maintenance free, where other manufactures require air/electrical rams the Global EMC door systems do not!
The Global EMC system can be easily re-sited without waste material.
The visible external aspects are painted so that horrible galvanised dulling is avoided.
Shielded Room Applications
Tempest (secure speech)
Medical applications – EEG and MRI Shielded Rooms
Nuclear shelter NEMP
EMC test applications
Quiet rooms for sensitive equipment or to negate high EMI polluted environments
Solar storm protection
Microwave radar applications
Anti-bugging or to prevent mobile communications equipment being used
Quiet rooms for phone and other communication device interrogation
Faraday Cage Shield Integrity Demonstration
The shield is working and the ambient ElectroMagnetic Interference (EMI) is excluded from the faraday cage. A copper wire is then threaded through an air vent which negates the shield integrity (as per faraday cage engineering rules). The wire is then removed and the shield integrity returns.
EEG Rooms - Lockheed Martin
High performance shield:
Shielded window option
Dimmable 12vdc lighting
12vdc 32A power input to an internal 12vdc outlet panel (no 230vac mains inside the chamber)
Carpet tile and white laminate décor interior
Photo courtesy of Nottingham University
For more information about Global EMC's Faraday Cage Shielding and RF/EMI Shielded Room services, please contact us.
About Global EMC
Global EMC UK Ltd has 30 years experience in RFI / EMI / EMC and are specialists in shielding / RF / Microwave absorber applications. Continual development of shielded
rooms (Faraday cages) and anechoic chambers has bought us to the forefront of shielded chamber and anechoic test chamber technology. Read More >