Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Dielectric characterization"”.
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Dielectric Characterization: A 3D EM Simulation Approach
… the complex permittivity of homogeneous dielectric materials. By modeling the test fixture and obtaining a set of simulated S-parameters through an iterative solution process, the dielectric constant and loss tangent can be found. With further development, the 3D simulation results may be …
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Dielectric characterization using a Wideband Dielectric Filled Cavity (WDFC)
… sample configurations used for characterizing dielectric materials over a wide band of frequencies. In the two configurations, a cylindrical cavity completely filled with a sample of the dielectric material of interest is used. The two configurations are the following: 1. The cylindrical cavity …
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Optimization Study of the Stripline Resonator Technique for Dielectric Characterization
… One of the most reliable techniques in material characterization at microwave frequencies is the coplaner coupled stripline resonator technique. This technique is an enhancement to the classical stripline resonator technique. In this technique, the measured resonance frequency and quality factor …
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Dielectric characterization of materials and lossy filter design using reflected group delay
… technologies employing coaxial, waveguide and dielectric resonators can meet these requirements but at the cost of large size. Low loss in these filter technologies can be identified by their high quality factor (Q-factor). Higher insertion loss (lower Q-factor) in the filter response is …
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Formal Compensation of Sensor-Related Interactions for Microwave Tomography
… in which, from an initial distribution of the dielectric contrast, the difference between the measured and model-computed equivalent scattered fields is minimized. This formalism is presented for the two-dimensional scalar case and has been successively extended to the scalar and vector …
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Graphene supported hafnium oxide nanopores for DNA sensing
… reported along with DNA transport properties and dielectric characterization of the film in solution.
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Thermal Stability of Al₂O₃/Silicone Composites as High-Temperature Encapsulants
… types of package structure and exhibit excellent dielectric performance in a wide temperature range (25 - 250°C) but are insufficiently stable against long-term aging (used by some manufacturers, e.g., P²SI, to evaluate polymer stability) at 250°C. These materials cracked during aging, causing …
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Synthesis and Characterization of Polymer Composite Materials For Lithium Battery Cathodes and Capacitors
<p>The dissertation discusses the synthesis and characterization of polymer composite materials used in lithium primary batteries and capacitors. The objective of the first part of the dissertation is to develop cathode materials based on silver vanadium oxide (SVO) coated with polypyrrole (PPy) …
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Use of sol-gels in the application of ceramic oxide thin films
… cations, different compounds were produced for dielectric characterization with an AC bridge circuit. In the case of the barium titanates, these calculated constants ranged from a high of 26.0 for TiO[subscript]2, to a low of 11.9 for BaTi[subscript]5O[subscript]11. The range for lithium …
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Ultra-Wideband Wireless Channels - Estimation, Modeling and Material Characterization
This licentiate thesis is focused on the characterization of ultra-wideband wireless channels. The thesis presents results on ultra-wideband communications as well as on the ultra-wideband characterization of materials. The communications related work consisted in the measurement and modeling of …