Investigation of the field uniformity of a mode-stirred chamber using diffusers based on acoustic theory

Author

Petirsch, Markus ; Schwab, Adolf Josef

Author_Institution

ERGmbH & Co., Pfinztal, Germany

Volume

41

Issue

4

fYear

1999

fDate

11/1/1999 12:00:00 AM

Firstpage

446

Lastpage

451

Abstract

This paper presents the combination of acoustic diffusors with a mode-stirred chamber to enhance the field homogeneity. Simulations with a TLM-based time-domain computer program show a more homogenous field in this advanced mode-stirred chamber as compared to a normal mode-stirred chamber. The efficiency of the diffusors is illustrated in comparison with a rectangular reference room. The simulations are verified by measurements in a mode-stirred chamber combined with two different types of diffusors. The two types of investigated diffusors are the maximum length diffusors and the quadratic residue diffusors. We also investigate the combination of both

Keywords

anechoic chambers (electromagnetic); electromagnetic compatibility; electromagnetic interference; time-domain analysis; EMC; EMI measurements; Schroeder diffusors; TLM-based time-domain computer program; acoustic diffusors; acoustic theory; electromagnetic compatibility; field homogeneity enhancement; field uniformity; homogenous field; maximum length diffusers; mode-stirred chamber; normal mode-stirred chamber; quadratic residue diffusors; rectangular reference room; reverberation chamber; Acoustic measurements; Acoustic scattering; Acoustic testing; Computer simulation; Conducting materials; Electromagnetic measurements; Electromagnetic scattering; Frequency; Optical reflection; Optical scattering;

fLanguage

English

Journal_Title

Electromagnetic Compatibility, IEEE Transactions on

Publisher

ieee

ISSN

0018-9375

Type

jour

DOI

10.1109/15.809847

Filename

809847