By the same authors

A method of reducing the number of ferrite tiles in an absorber lined chamber

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Published copy (DOI)

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Publication details

Title of host publicationEMC YORK 99: INTERNATIONAL CONFERENCE AND EXHIBITION ON ELECTROMAGNETIC COMPATIBILITY
DatePublished - 1999
Pages59-64
Number of pages6
PublisherINST ELECTRICAL ENGINEERS INSPEC INC
Place of PublicationEDISON
Original languageEnglish
ISBN (Print)0-85296-716-0

Abstract

Anechoic chambers are used for both emission and immunity testing but the ferrite tiles used to line the inside of the chamber are extremely expensive. This paper describes a method of reducing the number of tiles, whilst ensuring a reliable test environment.

The quality of a chamber is assessed by the magnitude of the difference between the Normalised Site Attenuation (NSA) inside the chamber, and the theoretical NSA of free space. The chamber being acceptable if this is less than 4 dB at all frequencies in the range of interest.

A genetic algorithm is used to optimise the layout of tiles with only 80% of the chamber walls covered. TLM[5] modelling is used to determine the NSA in the chamber. Measurements provided for comparison show that the optimised tile layout with 80% coverage gives results as good as a fully lined chamber.

    Research areas

  • TLM

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