Multipath effects in semi-anechoic chambers at low frequencies: a simplified prediction model based on image theory

Author

Orlandi, A.

Author_Institution

Dept. of Electr. Eng., L´´Aquila Univ., Italy

Volume

38

Issue

3

fYear

1996

fDate

8/1/1996 12:00:00 AM

Firstpage

478

Lastpage

483

Abstract

The multipath effects due to radiating sources inside a shielded room can not be neglected when the frequency of the harmonic components of the electromagnetic field are below the frequency threshold of the absorber lined walls. This paper deals with the prediction of the total radiated field by an electric dipole source inside a shielded room, taking into account the wall reflections. The model is based on an extension of the method of images to radiating sources in rectangular cavities. The prediction model is validated by comparing the results with those analytically obtained by the complex potential theory and with those obtained by measurements

Keywords

anechoic chambers; dipole antennas; electromagnetic fields; electromagnetic interference; electromagnetic shielding; electromagnetic wave absorption; electromagnetic wave reflection; EMI; absorber lined walls; complex potential theory; electric dipole source; electromagnetic field; frequency threshold; harmonic components; image theory; low frequencies; measurements; method of images; multipath effects; prediction model; radiating sources; rectangular cavities; semianechoic chambers; shielded room; total radiated field; wall reflections; Electromagnetic fields; Electromagnetic interference; Electromagnetic measurements; Electromagnetic modeling; Electromagnetic radiation; Electromagnetic reflection; Frequency; Predictive models; Proximity effect; Switched-mode power supply;

fLanguage

English

Journal_Title

Electromagnetic Compatibility, IEEE Transactions on

Publisher

ieee

ISSN

0018-9375

Type

jour

DOI

10.1109/15.536078

Filename

536078