A low temperature fired Na2CaV4O12 ceramic was synthesized via a solid-state reaction route at range of 350–550 °C. The Thermal analysis confirmed the densification and melting to be 530 °C 580 °C, respectively. Dielectric properties together with electrical conductivity were characterized broad frequency range. super-low relative permittivity εr = 7.72 loss tangent tanδ 0.06 obtained 1 MHz roo...

This work aims to provide a detailed understanding of the challenges related computation relative static permittivity and electrolytic conductivity sample medium from its impedance response recorded with interdigitated electrode (IDE) geometries. Within scope study, data has been measured evaluated for total nine media using two distinct IDE Particular emphasis is laid upon compensation parasit...

3D printing is more and often used for the development manufacturing of electronic devices components. These applications require knowledge about dielectric properties materials—in particular minimal stable values relative permittivity losses. The paper deals with testing loss factor materials as follows: PLA (in three dye modifications), PET-G, ABS ASA in frequency range 1–100 MHz. It was foun...

We contribute to the study of the optical properties of high-permittivity nanostructures deposited on surfaces. We present what we believe is a new computational technique derived from the coupled-dipole approximation (CDA), which can accommodate high-permittivity scatterers. The discretized CDA equations are reformulated by use of the sampling theory to overcome different sources of inaccuracy...

In this paper, a novel wave equation for electromagnetic waves in a medium having anisotropic permittivity has been derived with the help of Maxwell’s curl equations. The x and y components of the Maxwell’s equations are written with the permittivity ( ) being a 3× 3 symmetric matrix. These equations are solved for Ex , Ey, Hx, Hy in terms of Ez , Hz, and the partial derivatives. The Z componen...

in this paper, a new propagation model based on utd for multiple diffraction paths in cellular mobile radio communications in urban environments is proposed. moreover, the most rigorous novel utd-based expressions for multiple diffractions by buildings and excess path losses are d - rived and analyzed. for this purpose, building rows are supposed to have rectangular cross-sections with the same...

geotextiles are one of the most widely used synthetic materials in filtration and drainage applications. since in real applications, geotextiles are subjected to various hydraulic gradients and confining stresses, hydraulic behavior of geotextiles under different circumstances is of great practical importance. in this study filtration and drainage properties of several nonwoven needle-punched g...

This study introduces a fused filament fabrication (FFF) process for manufacturing complex-structured asteroid analogue objects to be applied in tomographic microwave radar measurements and inversion studies. We describe an approach control the volume fraction of plastic and, thereby, effective relative permittivity within tetrahedral wireframe which serves as metamaterial representing actual c...

A recently developed theory of atomic-scale local dielectric permittivity has been used to determine the position dependent permittivity profiles of a few nanoscale insulator surfaces and multilayers. Specifically, slabs containing single-component Si, polymer, and SiO2 and two-component Si-SiO2 and polymer-SiO2 systems of technological importance have been studied. The present approach indicat...

In vitro studies to investigate biological effect of electromagnetic field are performed for microwave to millimeter-wave frequency band. A reliable measurement method of complex permittivity for biological cells is required for the dosimetry. The feasibility of applying the waveguide penetration (WP) method to measure complex permittivity for cells in the frequency range from microwave to mill...