The radar absorption properties of the hollow Fe3O4 microspheres synthesized by the plasma dynamic method

Ivan Shanenkov, Alexander Sivkov, Alexander Ivashutenko, Viktor Zhuravlev, Guo Dong Wei, Guangshe Li, Wei Han

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

Abstract

This work presents the investigations of the radar absorbing properties of the hollow magnetite microspheres. They were produced in one short-time process of the plasma dynamic synthesis. The obtained particles was separated into fractions with sizes from 3 Μm to 30 Μm (fraction 1), from 30 Μm to ~ 100 Μm (fraction 2) and the fraction with size greater than 100 Μm (fraction 3). In order to investigate the microwave characteristics of materials, the selected fractions of the hollow microspheres were placed in an epoxy compound. The weight content of the filler in the compound was equal to ˜ 50%. The electromagnetic response of the samples was studied in the coaxial waveguide on the toroidal samples with thickness t = 2.2 mm. It was found that particles with sizes = 30 Μm provide the greatest signal attenuation up to -40 dB at the frequency ~ 10.5 GHz. There is also a shift of the absorption maxima in the region of low frequencies with increase in the size of hollow spheres. The samples provide a reflection coefficient smaller than -10 dB in following frequency ranges: 8.8÷16.2 GHz (No. 1), 7.4÷11.3 GHz (No. 2) and 3.7 ÷ 5.0 GHz (No. 3). Thus, fraction 1 has a band of operating frequencies at the -10 dB level of almost an octave. The sample on the base of initial synthesized powder allows attenuating the EM signal (below -10 dB) in the frequency range from 3.7 to 15.6 GHz, due to the presence of particles with a broad size distribution.

Original languageEnglish
Title of host publication2017 Progress in Electromagnetics Research Symposium - Spring, PIERS 2017
EditorsWeng Cho Chew, Sailing He, Sailing He
PublisherElectromagnetics Academy
Pages2889-2893
Number of pages5
ISBN (Electronic)9781509062690
DOIs
Publication statusPublished - 2017
Event2017 Progress In Electromagnetics Research Symposium - Spring, PIERS 2017 - St. Petersburg, Russian Federation
Duration: 22 May 201725 May 2017

Publication series

NameProgress in Electromagnetics Research Symposium
ISSN (Print)1559-9450
ISSN (Electronic)1931-7360

Conference

Conference2017 Progress In Electromagnetics Research Symposium - Spring, PIERS 2017
CountryRussian Federation
CitySt. Petersburg
Period22.5.1725.5.17

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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