Title :
Broadband EMI shielding for electro-optical systems
Author :
Bright, Clark I.
Author_Institution :
Southwall Technol. Inc., USA
Abstract :
Electromagnetic interference (EMI) shielding of apertures in electro-optical (EO) systems can be accomplished generally by transparent electrically conductive (EC) coatings, wire meshes or opaque EC coatings patterned to form meshes. The shielding effectiveness (SE) of these methods are studied both analytically and experimentally. The shielding due to both absorption and reflection as a function of frequency was evaluated. EO systems often use aperture windows made of dielectric or semiconductive material which transmit in the optical waveband(s) of interest. The effect of the substrate material on the SE of the both deposited transparent EC coatings and on opaque mesh patterned EC coatings is examined. The broadband shielding benefits of using aperture windows with EC coatings deposited on semiconductive window substrates is proposed
Keywords :
coatings; dielectric materials; electro-optical devices; electromagnetic shielding; semiconductor materials; absorption; aperture windows; apertures; broadband EMI shielding; dielectric material; electro-optical systems; electromagnetic interference shielding; frequency; opaque EC coatings; reflection; semiconductor material; shielding effectiveness; transparent electrically conductive coatings; wire meshes; Apertures; Coatings; Dielectric materials; Dielectric substrates; Electromagnetic interference; Electromagnetic wave absorption; Optical materials; Optical reflection; Semiconductor materials; Wire;
Conference_Titel :
Electromagnetic Compatibility, 1994. Symposium Record. Compatibility in the Loop., IEEE International Symposium on
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-1398-4
DOI :
10.1109/ISEMC.1994.385634
