Technique for Locating RF Leaks in the Flooring of Electromagnetic Shielding Enclosures

摘要

A challenge encountered in the troubleshooting of RF leaks in electromagnetic shielded enclosures comes when the RF breach is located in the floor. A particular application where this is troublesome has been shielded enclosures used in the medical industry for Magnetic Resonance Imaging (MRI) scanners. The gantry, or high field strength magnet, typically weighs over 4,000kg, with some gantry types weighing over 14,000kg. The rigging in and placing of this gantry over the RF shielded floor during installation can create RF leaks if caution is not used, or if construction techniques for the flooring are marginal. In addition, environmental factors such as moisture in the flooring after installation can create shielding problems leading to RF leaks.