Sökning: "open resonator"
Visar resultat 1 - 5 av 8 avhandlingar innehållade orden open resonator.
1. Low Phase Noise GaN HEMT Oscillator Design based on High-Q resonators
Sammanfattning : The thesis considers the design and optimization of oscillators targeting low phase noise, given boundary conditions from the technology. Crucial technology figures are power capability, RF noise figure, low-frequency noise and the quality factor (Q-factor) of the resonator. LÄS MER
2. Optimum GaN HEMT Oscillator Design Targeting Low Phase Noise
Sammanfattning : The thesis considers design of low phase noise oscillators, given the boundary condition of the used technology. Important conditions are the power handling of the active device, device noise floor, the quality factor of the resonator, bias settings, and low frequency noise. LÄS MER
3. Integration of Surface Acoustic Wave and Microfluidic Technologies for Liquid-Phase Sensing Applications
Sammanfattning : This thesis discusses a new concept for construction of a novel SAW in-liquid sensor employing surface acoustic wave resonance (SAR) in a one-port configuration. In this concept, the reflective gratings of a one-port SAW resonator are employed as mass loading-sensing elements, while the SAW transducer is protected from the measurement environment, reducing power losses significantly. LÄS MER
4. Acoustical Measurements of Material Nonlinearity and Nonequilibrium Recovery
Sammanfattning : A damaged material or a material with non perfect atomic geometry, dislocations or cracks, exhibits two types of characteristic responses to acoustic excitations. First is the fast nonlinear dynamics response that is present as long as the material is excited. As soon as the excitation stops the response disappear. LÄS MER
5. Nonlinear Acoustics Applied to NonDestructive Testing
Sammanfattning : Sensitive nonlinear acoustic methods are suitable for material characterization. This thesis describes three nonlinear acoustic methods that are proven useful for detection of defects like cracks and delaminations in solids. LÄS MER