Performance Notes on EMFaraCages^® Faraday Cages:

EMFaraCage^® faraday cage RF test chambers provide excellent radio frequency shielding in the range of 10 kHz to 6 GHz.

The electrical field shielding is very high, down to typical AC powerline frequencies of 50 – 60 Hz but the standard aluminum EMFaraCage^® faraday cage loses its magnetic shielding effectiveness at these lower frequencies. For applications requiring good magnetic shielding, options include steel faraday cage construction or providing an inner lining of material such as mu-metal.

High frequency performance is largely determined by penetrations, power and I / O provisions.

A standard shielded enclosure system is designed with wave guide below cutoff ventilation ports and fiber optic entry ports sized for maximum effectiveness below 6 GHz. LBA strongly recommends using fiber for all USB, Ethernet or other communication I / O provisions. At low RF frequencies, a system is much more tolerant of cabled connections, which will deteriorate electromagnetic shielding effectiveness.

Where RF I / O is required, systems can be furnished with specialized gland plates mounting most bulkhead connector types such as “N,” BNC and SMA. RF connectivity must be tightly controlled to ensure no ingress or egress of the very radio frequency signals the EMFaraCage^® faraday cage is being employed to block.

Access panels can be equipped with viewing windows. The impact of the windows on shielding effectiveness (SE) is a function of window type, size and frequency. A typical 15 cm x 15 cm window will have little impact at 100 MHz but deteriorate SE by 20 dB or more at 6 GHz. In systems with viewing panels, the lighting option of choice is an LED wall mounted battery light.

Devices under test (DUT) powering is also an important consideration. A frequently employed option is the AC power filter. These filters have little impact on the SE through 6 GHz. The ideal situation is to use only internal batteries to power the DUT and ancillaries. DC power can also be supplied through appropriate filters.

Using EMFaracages^®  for Protection Storage

Police and investigative agencies are faced with preserving and protection electronic devices or the data within them from intentional or unintentional compromise by radio frequency radiations. The LBA Technology EMFaraCage^® is a convenient, radio frequency secure storage enclosure for evidence room or laboratory. It is effective against RF frequencies to over 6000 MHz, and HEMP, solar flare and power line electrical fields. The EMFaraCage^® RF shielded enclosures may be configured for storage only, or with filtered power and data connections for use in evidence testing or “black hat” functions requiring isolation from external RF fields.