Anechoic chamber design using ray tracing and theory of images

Author

Mansour, Mansour K. ; Jarem, John

Author_Institution

Dept. of Electr. & Comput. Eng., Alabama Univ., Huntsville, AL, USA

fYear

1990

fDate

1-4 Apr 1990

Firstpage

689

Abstract

A ray-tracing technique which was used to help find the best possible anechoic chamber design in the frequency range of 30 MHz to 300 MHz is discussed. The electromagnetic fields due to a source inside the chamber are calculated. The scattered field is compared to the free space field to calculate the performance of the anechoic chamber in free space. The chamber is modeled as a rectangular cavity having walls made of lossy dielectric material. An electric dipole is used as a real model for actual currents on metallic surfaces. Fresnel reflection analysis is made with the electric field resolved into its components. The directions at which rays will leave the source are calculated using the theory of images. A numerical example of the technique is given

Keywords

anechoic chambers; electromagnetic field theory; electromagnetic wave reflection; electromagnetic wave scattering; geometrical optics; 30 to 300 MHz; Fresnel reflection analysis; anechoic chamber design; electric dipole; electromagnetic fields; free space field; lossy dielectric walls; modelling; ray tracing; rectangular cavity; scattered field; theory of images; Anechoic chambers; Dielectric losses; Dielectric materials; Electromagnetic fields; Electromagnetic propagation; Electromagnetic scattering; Frequency; Fresnel reflection; Ray tracing; Wires;

fLanguage

English

Publisher

ieee

Conference_Titel

Southeastcon '90. Proceedings., IEEE

Conference_Location

New Orleans, LA

Type

conf

DOI

10.1109/SECON.1990.117905

Filename

117905