Fundamental Characteristics of Shielding Effectiveness for Electromagnetic Wave of Plastic Composite Oriented Fine Copper Wire.

Abstract

The electromagnetic interference (EMI) may cause disruptions in robots, personal computers, cellular phones, medical appliance and other electronic instruments. It is therefore important to develop the materials where shield the electromagnetic wave in the environment from the EMI generated by electronic devices. This study was performed to obtain an instruction for the development of smart materials having shielding effectiveness for electromagnetic wave. In the plastic composites used, fine copper wires were oriented with various angles and separations. The fundamental characteristics of shielding effectiveness for electromagnetic wave investigated for the basic plastic composite and carbon fiber reinforced composite. The shielding effectiveness was measured using a copper shielding box located in an electromagnetic shielding room. It was found out that the shielding effectiveness for electromagnetic wave depends on the oriented angle of copper wire. The shielding effectiveness decreased with increasing the wire separation. For carbon fiber reinforced composites, the shielding effectiveness was improved by the contact of carbon fiber each other.