Analysis on Influence of Shielding on EMC of Electronic Devices

Aiming at the requirement for shielding effectiveness of shielding case of electronic devices of electromagnetic compatibility(EMC) testing standard,this paper firstly analyzes the shielding effectiveness of shielding case and describes how to select the material and its thickness of shielding case based on the practicality by analyzing the reflection loss and absorption loss of shielding case.In addition,the influence of holes and gaps on the shielding effectiveness of shielding case is analyzed.Combining with two EMC testing examples,this paper analyzes how to handle the holes and gaps of shielding case to improve the EMC of electronic devices.Finally,the paper analyzes and discusses how to improve the EMC of electronic devices by strengthening the shielding effectiveness of shielding case in the design phase.