Research of the Shielding Effectiveness for Double Layer Metallic Enclosures Based on HFSS

Abstract

The effects of electromagnetic interference are getting worse with the wide application of electronic devices. For better understanding that the strong electromagnetic environment affected the metallic enclosure, it used double layer metallic enclosures in a mechatronics system as the research object to set up models. And it used HFSS software on FEM to simulat and analyze the effect on shell shielding effectiveness. The results show that: built-in circuit board can improve the electromagnetic shielding, different typical metallic material has less impact on the shielding effectiveness, and penetrative wire can reduce the shielding effectiveness of inner enclosure, but the wire coated copper sheath on surface can improve that. The research can guide the design of the electromechanical system’s structure, strengthen the anti electromagnetic interference to achieve the better shielding effectiveness.