Abstract
A magneto-dielectric material composed of a polyester resin-based microstrip (P115A), copper sheets and magnetite powders was designed in concentrations of 10, 20 and 30% Wt and with filters of 200, 325 and 500. The particles were aligned vertically and horizontally during the curing process using 300 mT magnetic fields. From a complete factorial design of 33, 27 microstrip-type circuits of 4 mm width, 70 mm length and 0.93 mm thickness were manufactured, characterized by scanning electron microscopy and vector network analysis. The cross-matrix analysis determined an optimal circuit response from the magneto-dielectric material with a concentration of 20% magnetite and an average particle size of 21.48 μm in horizontal alignment to the applied magnetic field and to the transmission line, obtaining a relative dielectric constant of Er 3.88 with a low dielectric loss of 0.054, within an operating range of 150 KHz to 4 GHz.
Highlights
The objective of this research work was to verify the effect of the concentration, size and distribution of magnetite particles on the properties of a magneto-dielectric composite, characterized by vector network analysis (VNA)
A magneto-dielectric material composed of a polyester resin-based microstrip (P115A), copper sheets and magnetite powders was designed in concentrations of 10, 20 and 30% Wt and with filters of 200, 325 and 500
The manufacturing method of a magneto-dielectric material made of P115A polyester resin and micrometric particles of magnetite is here presented, which were elaborated in three configurations according to the disposition of the particles in the polymeric matrix [9], arranged randomly, aligned in vertical and horizontal positions with respect to a constant magnetic field of 300 mT during the curing process [10]
Summary
The objective of this research work was to verify the effect of the concentration, size and distribution of magnetite particles on the properties of a magneto-dielectric composite, characterized by vector network analysis (VNA) This type of research has gained relevance because advances in information and communication technologies have required the development of new electronic devices and components in order to increase the speed of the transmission of large volumes of information. [1] That, in turn, has multifunctional benefits, such as high permeability and low losses [2], in addition to inductive and capacitive properties [3], which enable the manufacture of generation microwave communication devices [4] This type of material is known as a magneto-dielectric composite, [5] the functionality of which is closely linked to the relationship between the matrix and the particles [6], the size and distribution of which should be studied in order to improve the performance of this type of material [7,8]. The characterization of the material was carried out by means of a Rohde & Schwarz ZVB8 Networks vector network analyzer, through measurements on a transmission line of 4 mm width, 70 mm length
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