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 12 of 12 for “"Microwave engineering"”.
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Microwave engineering in superconducting nanowires for single-photon detection
… treated as lumped circuit elements, and their microwave properties were largely neglected. In this thesis, we engineer the nanowires into kinetic-inductive transmission lines and use them to devise new single-photon detector architectures. Through impedance engineering, we developed a …
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Nonlinear and Time-Modulated Metamaterials: Applications at Microwave Frequencies
… exotic electromagnetics phenomena. By careful engineering of the material properties, invoking nonlinear elements and/or time-modulating some of the material parameters, linearity and/or time-invariance can be broken in metamaterials, enabling extraordinary wave phenomena that open …
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Bandpass filter design with spurious frequency reduction capability
… coupled line filter are widely used in daily microwave engineering practice. There are various topologies to implement microstrip bandpass filters such as end-coupled, parallel coupled, hairpin, interdigital and combine filters. This thesis discusses design, simulation, fabrication and testing …
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The application of thin film planar waveguides as a refractive index detector for microscale high performance liquid chromatography
… planar waveguides were originally introduced in microwave engineering. The spectroscopist began to use such waveguides as tools to solve chemical characterization problems since Harrick and Fahrenfort introduced the Attenuated Total'Reflection (ATR) in the early 1960's. Today, planar waveguides …
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Design rectenna for wireless energy harvesting
… a 2.45 GHz rectenna to capture and convert microwave signal into DC power. Generally, rectenna introduces an overview of a rectifying antenna (rectenna) circuit topology for energy harvest. Specially, a rectenna based on a microstrip patch antenna and a microwave rectifier and both of them …
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3D Electromagnetic Simulation Tool Exposure for Undergraduate Electrical Engineers: Incorporation Into an Analog Filters Course
… of high-frequency circuits. To give electrical engineering students a better understanding of the behavior of electromagnetic fields, experiments including the use of 3D EM simulation software were proposed. Most students get lost in differential equations, curls, and divergences; this thesis …
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High-fidelity microwave control of single-atom spin qubits in silicon
As classical computers begin to reach their fundamental performance limits, quantum computers will be an invaluable tool for the advance of science and technology. The trillion dollar silicon electronics industry sets the perfect stage for the evolution of quantum computation, yet it has so far …
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Broadband THz time-domain spectroscopy of biomolecules : a comprehensive study of the dielectric properties of biomaterials in the far-infrared
… of the University Ulm and the department of microwave engineering and high frequency technology at the University of Erlangen-Nürnberg demonstrate the interdisciplinary character of this work. <br>This thesis is structured in the following way: <br>In Chapter 1 the basic aspects of …
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From high power terahertz quantum cascade lasers to terahertz light amplifiers
… microstrip antenna-a structure commonly used in microwave engineering-to THz photonics devices. By coupling the microstrip antenna to each grating aperture of a perfectly phase-matched DFB laser, the radiation impedance of the laser can now be tuned to enhance the overall emission efficiency. …
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Synthesis, design, and fabrication techniques for reconfigurable microwave and millimeter-wave filters
… design, and implementation of reconfigurable microwave and millimeter-wave filters for use in such receivers.</p> <p>First, a theoretical framework is developed for absorptive bandstop filters, a new class of bandstop filters which overcomes some of the limitations of traditional tunable …