Results 21 to 30 of about 82,897 (310)

Measurement of Complex Permittivity for Rapid Detection of Liquid Concentration Using a Reusable Octagon-Shaped Resonator Sensor

open access: yesMicromachines, 2023
Substrate-integrated waveguides (SIWs) are widely used in microwave systems owing to their low cost and ease of integration. In this study, an SIW-based resonator that reacts to the complex permittivity variation of solutions with dimensions of 79.2 mm ×
Chun-He Quan   +2 more
doaj   +1 more source

Prediction on the relative permittivity of energy storage composite dielectrics using convolutional neural networks: A fast and accurate alternative to finite-element method

open access: yesiEnergy, 2022
The relative permittivity is one of the essential parameters determines the physical polarization behaviors of the nanocomposite dielectrics in many applications, particularly for capacitive energy storage.
Shao-Long Zhong   +5 more
doaj   +1 more source

Dielectric characterization of vegetation at L band using an open-ended coaxial probe [PDF]

open access: yesGeoscientific Instrumentation, Methods and Data Systems, 2018
Decoupling the integrated microwave signal originating from soil and vegetation remains a challenge for all microwave remote sensing applications. To improve satellite and airborne microwave data products in forest environments, a precise and reliable
A. Mavrovic   +13 more
doaj   +1 more source

Dielectric Properties of Textile Materials: Analytical Approximations and Experimental Measurements—A Review

open access: yesTextiles, 2022
Deciphering how the dielectric properties of textile materials are orchestrated by their internal components has far-reaching implications. For the development of textile-based electronics, which have gained ever-increasing attention for their uniquely ...
Yusuke Yamada
doaj   +1 more source

Complex Dielectric Permittivity Extraction Based on Multilayer Thin Film Microstrip Lines [PDF]

open access: yes, 2017
This paper presents an analytical method for the extraction of the complex relative permittivity of multi-layered dielectric substrates that are used to construct thin film microstrip lines (TFMLs).
Bulja, Senad   +4 more
core   +1 more source

Determination of Complex Permittivity of Low-Loss Materials From Reference-Plane Invariant Transmission/Reflection Measurements

open access: yesIEEE Access, 2019
In this paper, a novel method is proposed to determine unique and stable relative complex permittivity of low-loss materials from the transmission/reflection (TR) measurements, though the positions of the materials under test are unknown.
Chuang Yang, Hui Huang
doaj   +1 more source

Environmental electromagnetic characterization framework for wearable antenna materials [PDF]

open access: yes, 2014
In wearable antenna design, the prevailing atmospheric conditions can have a significant effect on the electromagnetic properties of the fabric substrate and hence the resulting antenna performances. Therefore, an accurate characterization of this effect
Agneessens, Sam   +4 more
core   +2 more sources

Complex permeability and permittivity variation of radar absorbing materials based on MnZn ferrite in microwave frequencies [PDF]

open access: yesMaterials Research, 2013
The complex dielectric permittivity (ε) and magnetic permeability (µ) of Radar Absorbing Materials (RAM) based on magnetic particles (MnZn ferrite particles) embedded in a dielectric matrix (silicon rubber) have been studied in the frequency range of 2 ...
Adriana Medeiros Gama   +1 more
doaj   +3 more sources

ONE-DIMENSIONAL INVERSE PROBLEMS OF ELECTROMAGNETIC PROBING STRATIFIED DIELECTRIC MEDIA [PDF]

open access: yesРадиофизика и электроника, 2015
The problem of permittivity profile reconstruction from reflection coefficient data for a stratified dielectric medium illuminated with a probing plane electromagnetic wave at a finite set of frequencies is considered to deal with a topical problem in ...
A. V. Brovenko   +4 more
doaj   +1 more source

Tree Roots Reconstruction Framework for Accurate Positioning in Heterogeneous Soil

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022
Ground-penetrating radar has recently found wide application in the underground imaging of tree roots. However, ignoring the random and complex nature of the heterogeneous soil and assuming the soil's relative permittivity constant throughout the ...
Wenhao Luo   +5 more
doaj   +1 more source

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