Requirements to test and measure various RF products puts a high demand on RF shielded test facilities such as RF shielded test enclosures. RF shielded enclosure may refer to any type of enclosure with RF shielding properties including RF shielded boxes, cabinets, and rooms. The purpose of a RF shielded test enclosure is to provide good shielding for the device under test, inside the shielded test enclosure, from interference. For this reason, the attenuation achieved in an RF shielded test enclosure is important. Different applications require different shielding attenuation, but in all cases, the RF shielded enclosure design is crucial in order to achieve the right attenuation.