Title :
Low-frequency representation of radio-frequency absorbers
Author :
Johnk, R. ; Randa, J.
Author_Institution :
Div. of Electromagn. Fields, Nat. Inst. of Stand. & Technol., Boulder, CO, USA
Abstract :
The low-frequency behavior of RF absorbers and absorber-lined chambers (ALC) is of considerable interest and has received a corresponding amount of attention in the EMC community. We present a simple model to characterize the behavior of radio-frequency absorbers at low frequency. The absorber is represented by a flat, homogeneous, isotropic slab of lossy material, with effective constitutive parameters. These parameters are determined by a fit to measured data. Excellent fits are obtained in the two applications considered. The model is intended for use in the characterization of absorber-lined chambers at low frequency. It could also be used to predict the low-frequency performance of partially loaded shielded enclosures
Keywords :
anechoic chambers; electromagnetic compatibility; electromagnetic shielding; electromagnetic wave scattering; radiofrequency interference; EMC; RF absorbers; absorber lined chambers; effective constitutive parameters; flat homogeneous isotropic slab; lossy material; low-frequency performance; low-frequency representation; measured data; partially loaded shielded enclosures; radiofrequency absorbers; scattering properties; Automatic logic units; Conducting materials; Electromagnetic compatibility; Electromagnetic measurements; Permittivity; Predictive models; Radio frequency; Reflection; Slabs; Testing;
Conference_Titel :
Electromagnetic Compatibility, 1996. Symposium Record. IEEE 1996 International Symposium on
Conference_Location :
Santa Clara, CA
Print_ISBN :
0-7803-3207-5
DOI :
10.1109/ISEMC.1996.561223
