Search for dissertations about: "high impedance surface"
Showing result 21 - 25 of 62 swedish dissertations containing the words high impedance surface.
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21. Prediction and Optimisation of Traffic Noise. A Study on Noise Barriers and Shielded Areas
Abstract : The main contribution of noise levels in cities is today road traffic. The strongest source for all road vehicles is most often the tyre-road contact. This source position close to the ground is fortunate with respect to secondary noise abatement measures, such as absorbing road surfaces or noise barriers. READ MORE
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22. Prediction and experimental validation of dynamic soil-structure interaction of an end-bearing pile foundation in soft clay
Abstract : In the built environment, human activities such as railway and road traffic, constructionworks or industrial manufacturing can give rise to ground borne vibrations. Such vibrations become a concern in urban areas as they can cause human discomfort or disruption of vibration sensitive equipment in buildings. READ MORE
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23. Analysis of Conformal Antennas and Periodic Structures
Abstract : In the last decades much attention has been paid to the design of high-performance antennas. Accurate control of the radiation properties is very important in electromagnetic engineering applications. READ MORE
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24. Investigation of surface and interface phenomena in silicon and silicon dioxide systems
Abstract : The characterization of a thin silicon dioxide (SiO2) film close to the silicon dioxide -silicon interface is very important in understanding and improving solid state electronic and optoelectronic devices. The refractive index, the dielectric constant, and the density of oxide film, are all related to the chemical composition and porosity (voids) of the films. READ MORE
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25. Planar-Goubau-line components for terahertz applications
Abstract : Terahertz-wave technology has a broad range of applications, including radio astronomy, telecommunications, security, medical applications, pharmaceutical quality control, and biological sensing. However, the sources, detectors, and components are less efficient at this frequency band due to parasitic effects and increased total losses, which hinder the performance of terahertz systems. READ MORE