科研之友
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摘要
Radiations from different electrical devices cause electromagnetic interference which will influence the performance realization of other electromagnetic device and cause the health concerns. The conductive sheets were then used to develop wood electromagnetic shielding plywood by laminating with the wood veneers. The shielding effectiveness of plywood ranged from 55.87 to 71.75 dB (100 KHz to 1 GHz) which indicated it could be used as effective shielding materials for electromagnetic radiation. Through analyzing on the bonding method in the design of electromagnetic compatibility structure and considering the characteristics of electromagnetic shielding plywood for engineering applications, the bonding methods were designed into opposite joint by glue, inclined joint by glue and step joint by copper foil. The shielding properties of plywood after bonding were evaluated using two methods. The results showed that the seams between the joint plywood resulted in the decline of electromagnetic performance. From the coaxial test, it was found that this test method could not be effectively evaluated the bonding quality when the joint seams were located in the diameter direction of the annular specimen. From the shielding room test, the shielding effectiveness descent of plywood using copper foil connection method decreased smaller than that of the other two connecting methods, which indicated that the copper foil connection was the best bonding method to suppress the electromagnetic leakage.
- 出版日期2013
- 单位中国林业科学研究院
