Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
818638 | Composites Part B: Engineering | 2012 | 6 Pages |
Abstract
A study has been conducted to estimate the complex permittivity and permeability along with magnetic characterization of different volume fractions of magnetodielectric composites with cobalt ferrite nano inclusions. Using an in touch superstrate technique dielectric properties are estimated. Cavity perturbation technique is used to study the complex permeability of the samples. 4ÏMs value and coercivity is measured using vibrating sample magnetometry. Structural and surface morphologies on the composite samples are conducted to determine the size and homogeneous distribution of nano inclusions. The average grain size of cobalt ferrite nanoparticles is found to be â¼10 nm. The real part of permittivity and permeability of the samples varies from â¼1-2.905 to â¼1.01-1.05 with increase in inclusion content from 1% VF to 5% VF, respectively. The tan δ of permittivity and imaginary part of permeability is found to be of the order of â¼10â3 and â¼10â1 respectively. Verification of these composites as potential substrates for microstrip patch antenna is carried out by fabricating simple rectangular patch at 9.5 GHz using transmission line model. Rectangular patch is designed on 5% VF composite system. The return loss for the composite system was found to be â¼â19.451 dB which is comparable with that designed on standard glass epoxy substrate (εr = 4.5).
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Authors
Kunal Borah, Nidhi S. Bhattacharyya,