The calculation and analysis of shielding efficiency

With the wide application of electronic equipment, electromagnetic radiation pollution has become the fourth-largest public nuisance after the atmospheric pollution, water pollution, noise pollution. In order to meet the requirements of electromagnetic compatibility, some shielding measures must be taken. Therefore, the study of electromagnetic shielding body's shielding effectiveness analysis and calculation has become a hot topic in the field of electromagnetic compatibility. For ventilation and heat dissipation, often need to open some holes on shielding shell, so the calculation with some small holes shield shielding effectiveness is also very necessary. This paper adopts theoretical analysis, numerical calculation and CST simulation software to calculate the shielding effectiveness of the shield.