Title :
Resonance suppression of a spherical electromagnetic shielding enclosure by using conductive dielectrics
Author :
Yamane, Toshihiro ; Nishikata, Atsuhiro ; Shimizu, Yasutaka
Author_Institution :
Graduate Sch. of Sci. & Eng., Tokyo Inst. of Technol., Japan
fDate :
11/1/2000 12:00:00 AM
Abstract :
The resonance suppression for the electromagnetic shielding enclosure is theoretically investigated. A simple model of a double-layered spherical shell with a plane-wave illumination is assumed. When a spherical shell made of conductive dielectrics is covered with a thin metal layer, the conductivity of the dielectrics has an optimum value which minimizes the Q-factor at the fundamental resonant frequency. The optimum conductivity is shown to be a function of the resonant frequency and the thickness of the dielectric layer. The improvement of the shielding effectiveness by introducing the optimum conductivity is shown
Keywords :
Q-factor; conducting bodies; dielectric bodies; electrical conductivity; electromagnetic shielding; electromagnetic wave transmission; inhomogeneous media; losses; packaging; resonance; Q-factor; conductive dielectric; dielectric conductivity; dielectric layer thickness; double-layered spherical shell; fundamental resonant frequency; optimum conductivity; plane-wave illumination; resonance suppression; shielding effectiveness; spherical electromagnetic shielding enclosure; thin metal layer; transmission loss; Cavity resonators; Conductivity; Dielectrics; Electromagnetic radiation; Electromagnetic shielding; Electronic equipment; Lighting; Q factor; Resonance; Resonant frequency;
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
