Title :
EM shielding measurement and analysis of nonmetallic materials after and before aging and environmental stresses
Author :
Fogliati, Paolo ; Rubino, Ennio
Author_Institution :
Centro Ricerche Fiat Electron. Syst., Torino, Italy
Abstract :
A set of innovative nonmetallic materials having EM (electromagnetic) shielding properties has been selected. Available data on shielding effectiveness of nonmetallic materials are incomplete and not easily comparable. Therefore, a common testing methodology has been chosen based on a double TEM (transverse electromagnetic) cell, in order to obtain comparable and repeatable data. The measurement set-up is easily reproducible and does not affect the results. A large number of specimens, have been tested. The effects on shielding effectiveness due to aging and environmental stresses (temperature, humidity, salt fog, etc.) have been evaluated through a comparison of experimental results. It was found that environmental stresses have a significant effect on the shielding effectiveness of composite materials
Keywords :
ageing; composite materials; electric variables measurement; environmental degradation; magnetic shielding; magnetic variables measurement; plastics; EM shielding measurement; TEM cell; aging effects; common testing methodology; composite materials; environmental stresses; humidity; nonmetallic materials; plastic materials; salt fog; shielding effectiveness; temperature; transverse electromagnetic; Aging; Conducting materials; Electromagnetic fields; Electromagnetic measurements; Inorganic materials; Phase measurement; Plastics; Power measurement; TEM cells; Testing;
Conference_Titel :
Electromagnetic Compatibility, 1990. Symposium Record., 1990 IEEE International Symposium on
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-7264-6
DOI :
10.1109/ISEMC.1990.252724
