scholarly journals NON-CONTACT DIELECTRIC MEASUREMENTS ON POLYMER FILMS

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Blanka Škipina ◽  
Adriaan S. Luyt ◽  
Duško Dudić
Keyword(s):  
Test Material ◽  
Dielectric Measurements ◽  
Dielectric Parameters ◽  
Dielectric Characterization ◽  
Polar Polymers ◽  
Flow Through ◽  
Characterization Of Materials ◽  
Simple Measuring ◽  
Stable Current

Dielectric characterization of materials in the RF domain is usually carried out on samples with applied electroconductive electrodes. A high-quality contact between a sample and the measuring electrodes provides a stable current flow through the sample and information on the exact value of the electric field in which the sample is located. It also enables a simple measuring instrument to determine the dielectric parameters of the material being tested. However, the presence of contact potentials and the exchange of charge between the test material and the applied electrodes can mask some electrical phenomena in the material or significantly affect how we perceive these phenomena. In order to detect weak electrical processes in the material, for example the photoelectric response of non-polar polymers, contactless dielectric measurements must be carried out. The literature on non-contact dielectric measurements in the RF domain is poor, and because of that, this paper presents the methodology for determining the dielectric parameters of film-shaped materials in conditions of contactless dielectric measurements.

scholarly journals Design and Simulations of 2D Planar Antenna for Dielectric Characterization of Biological Samples

2021 ◽  
Vol 6 (1) ◽  
pp. 42
Author(s):  
Urvashi Urvashi ◽  
Zeeshan Saifi ◽  
Mridul Kumar ◽  
Soami Daya Krishnananda
Keyword(s):  
Dielectric Properties ◽  
Biological Samples ◽  
Return Loss ◽  
Capacitive Coupling ◽  
Dielectric Parameters ◽  
Patch Type ◽  
Dielectric Characterization ◽  
Enhanced Sensitivity ◽  
Properties Of Materials

The dielectric parameters help in understanding the structural, compositional and functional analysis of biological samples. These parameters have also been widely adopted in biomedical and therapeutic fields. In the microwave region, these parameters attract interest because the principal constituent of most biological cells is water. Therefore, it is difficult to isolate the dielectric response of water present in a biological composite. Therefore, the technique with enhanced sensitivity is essential for measuring the dielectric properties of biological samples. In this paper, we report the design and CST simulation of a 2D-planar patch type antenna with capacitive coupling introduced by dividing the patch through a gap. The aforementioned design further improves the antenna’s sensitivity to the dielectric properties of materials. Here, we simulated ten biological phantoms by measuring the shift in resonant frequency and return loss. Our results were identical when loading samples on either of the two introduced patches. These results suggest the repeatability and further improvements in a cavity-based technique where the sample localization is an important issue. Moreover, we analytically studied the dependency of gain and directivity of the antenna on the capacitive coupling, which plays a major role in the antenna’s sensitivity to dielectric characterization.

A comparative review of the main techniques for electromagnetic characterization of materials / Uma revisão comparativa das principais técnicas de caracterização eletromagnética de materiais

2021 ◽  
Vol 7 (7) ◽  
pp. 75176-75188
Author(s):  
Marcelo da Silva Matias ◽  
Luis Alberto Rabanal Ramirez
Keyword(s):  
Detailed Analysis ◽  
Microwave Frequency ◽  
Specific Technique ◽  
Dielectric Characterization ◽  
Comparative Review ◽  
Measurement Results ◽  
Characterization Of Materials

This paper presents the main techniques of electromagnetic characterization electromagnetic at microwave frequency. A detailed analysis of these is performed, indicating which materials under test (MUT) can be measured with the specific technique. Additionally, for the dielectric characterization, measurement results are presented with the best technique that suits this case.

Some applications of electron beam microanalysis techniques in VLSI process evaluation

1983 ◽  
Vol 41 ◽  
pp. 160-161
Author(s):  
Simon Thomas
Keyword(s):  
Integrated Circuits ◽  
Process Evaluation ◽  
Large Scale ◽  
Technology Development ◽  
Analytical Techniques ◽  
Successful Implementation ◽  
Analysis Of Failures ◽  
Characterization Of Materials ◽  
Circuits Vlsi

Trends in the technology development of very large scale integrated circuits (VLSI) have been in the direction of higher density of components with smaller dimensions. The scaling down of device dimensions has been not only laterally but also in depth. Such efforts in miniaturization bring with them new developments in materials and processing. Successful implementation of these efforts is, to a large extent, dependent on the proper understanding of the material properties, process technologies and reliability issues, through adequate analytical studies. The analytical instrumentation technology has, fortunately, kept pace with the basic requirements of devices with lateral dimensions in the micron/ submicron range and depths of the order of nonometers. Often, newer analytical techniques have emerged or the more conventional techniques have been adapted to meet the more stringent requirements. As such, a variety of analytical techniques are available today to aid an analyst in the efforts of VLSI process evaluation. Generally such analytical efforts are divided into the characterization of materials, evaluation of processing steps and the analysis of failures.

Applications of Transmission Electron Microscopy in the Characterization of Metal Machinability

1968 ◽  
Vol 26 ◽  
pp. 442-443 ◽  
Author(s):  
L.E. Murr ◽  
A.B. Draper
Keyword(s):  
Electron Microscopy ◽  
State Physics ◽  
Test Material ◽  
Milling Machine ◽  
Rotary Table ◽  
Solid State Physics ◽  
Materials Properties ◽  
Transmission Electron ◽  
Selection Of

The industrial characterization of the machinability of metals and alloys has always been a very arbitrarily defined property, subject to the selection of various reference or test materials; and the adoption of rather naive and misleading interpretations and standards. However, it seems reasonable to assume that with the present state of knowledge of materials properties, and the current theories of solid state physics, more basic guidelines for machinability characterization might be established on the basis of the residual machined microstructures. This approach was originally pursued by Draper; and our presentation here will simply reflect an exposition and extension of this research.The technique consists initially in the production of machined chips of a desired test material on a horizontal milling machine with the workpiece (specimen) mounted on a rotary table vice. A single cut of a specified depth is taken from the workpiece (0.25 in. wide) each at a new tool location.

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