Complex permittivity and permeability of composite materials based on carbonyl iron powder over ultrawide frequency band
Semenenko, VN; Chistyaev, VA; Politiko, AA; et al.Kibets, SG; Kisel, VN; Gallagher, CP; McKeever, C; Hibbins, AP; Ogrin, FY; Sambles, JR
Date: 27 July 2021
Journal
Physical Review Applied
Publisher
American Physical Society
Publisher DOI
Abstract
The complex electrical permittivity and magnetic permeability of composite materials made of a polymer binder filled with micron-scale carbonyl iron powder (CIP) are measured between 0.1 and 39 GHz. Permeability is measured in overlapping frequency subbands using two different techniques: a free-space method from 3 to 39 GHz and a ...
The complex electrical permittivity and magnetic permeability of composite materials made of a polymer binder filled with micron-scale carbonyl iron powder (CIP) are measured between 0.1 and 39 GHz. Permeability is measured in overlapping frequency subbands using two different techniques: a free-space method from 3 to 39 GHz and a coaxial impedance cell from 0.1 to 5 GHz. The dependence on filler concentration is studied for composites based on phosphated CIP R-100F-2. It is found that the static permittivity and permeability of the composites increase logarithmically with increasing percentage of CIP volume loading; this corresponds to Lichtenecker's law for a mixture of two components. It is demonstrated that by using the R-100F-2 type CIP it is possible to produce single-layer radar-absorbing materials with a relatively small thickness (less than 1.5 mm) and a deep and broad normal-incidence reflectivity minimum (less than -20 dB) from 10 to 30 GHz.
Physics and Astronomy
Faculty of Environment, Science and Economy
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