Evaluation of Electrical Conduction Property at Conductive Shield Layer to Improve Performance of Magnetically Shielded Rooms

To improve a performance of conductive shield, which is constructed in magnetically shielded rooms (MSRs) with high shielding performance, we introduce an evaluation method for electrical conduction property at joint part of conductive plates (e.g., Cu, Al). Some actual resistance sensors are developed via numerical analysis to evaluate the conduction property. We measure the resistance value at joint part of a simple conductive-shield box and its shielding performance on high frequency magnetic noise, and the results reveal that they have a correlation.