EMI shielding measurements of conductive polymer blends

L. W. Shacklette, N. F. Colaneri

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

10 Scopus citations

Abstract

Shielding efficiencies for a number of blends containing a variety of conductive fillers, including intrinsically conductive polymers, have been measured in the near-field with a dual-chamber box and in the far-field with a transmission line fixture. Although all samples tested satisfied the classical good conductor approximation, most of them exhibited a cross-over from being electrically thin (thickness < skin depth) to being electrically thick (thickness > skin depth) over the frequency range of interest, 1 MHz to 3 GHz. The theoretical relations for both near-field and far-field shielding which are prevalent in the literature do not accurately describe this region of crossover. Expressions are defined that describe the behavior accurately over the entire range of interest. Far-field shielding efficiencies as high as 70 dB at 1 GHz were measured for purely organic composites consisting of an intrinsically conductive polymer dispersed in a thermoplastic matrix.

Original languageEnglish (US)
Title of host publicationConference Record - IEEE Instrumentation and Measurement Technology Conference
Editors Anon
PublisherPubl by IEEE
Pages72-78
Number of pages7
ISBN (Print)0879425792
StatePublished - May 1 1991
Event1991 IEEE Instrumentation and Measurement Technology Conference - Atlanta, GA, USA
Duration: May 14 1991May 16 1991

Publication series

NameConference Record - IEEE Instrumentation and Measurement Technology Conference

Other

Other1991 IEEE Instrumentation and Measurement Technology Conference
CityAtlanta, GA, USA
Period5/14/915/16/91

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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