EMI shielding measurements of conductive polymer blends

Nicholas Colaneri, Lawrence W. Shacklette

Research output: Contribution to journalArticle

343 Citations (Scopus)

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 crossover 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. The authors have derived expressions which 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, polyaniline, dispersed in a thermoplastic matrix.

Original languageEnglish (US)
Pages (from-to)291-297
Number of pages7
JournalIEEE Transactions on Instrumentation and Measurement
Volume41
Issue number2
DOIs
StatePublished - Apr 1992
Externally publishedYes

Fingerprint

polymer blends
Polymer blends
Shielding
shielding
far fields
near fields
crossovers
fixtures
polymers
Polymers
Polyaniline
fillers
Thermoplastics
transmission lines
boxes
Fillers
Electric lines
Skin
conductors
chambers

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Instrumentation

Cite this

EMI shielding measurements of conductive polymer blends. / Colaneri, Nicholas; Shacklette, Lawrence W.

In: IEEE Transactions on Instrumentation and Measurement, Vol. 41, No. 2, 04.1992, p. 291-297.

Research output: Contribution to journalArticle

Colaneri, Nicholas ; Shacklette, Lawrence W. / EMI shielding measurements of conductive polymer blends. In: IEEE Transactions on Instrumentation and Measurement. 1992 ; Vol. 41, No. 2. pp. 291-297.
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