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 “"Cavity resonator"”.
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Coupled resonator based wireless power transfer for bioelectronics
… this dissertation, I propose the use of coupled resonator WPT for bioelectronics and present a new generalized analysis and optimization methodology, derived from complex microwave bandpass filter synthesis, for maximizing and controlling coupled resonator based WPT performance. This newly …
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A piezo-tunable gigahertz cavity microelectromechanical resonator
… fabrication and testing of a electromagnetic cavity resonator designed for such applications. Alternative technologies provide wide tuning or high Q, but not both, and are generally not tunable. This resonator is distinguished by its simultaneous high Q near 200 and its wide high-frequency …
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RELATIVISTIC BACKWARD WAVE OSCILLATOR WITH A GAUSSIAN RADIATION PATTERN AND RELATED TECHNOLOGIES
… Thus, to extract the microwave signal axially, a cavity resonator reflector or cutoff waveguide section are widely used to reflect the TM01 mode backward wave to a TM01 mode forward wave. To provide a HPM Gaussian-like TE11 wave beam, an X-band relativistic BWO (RBWO) is proposed that uses a Bragg …
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A circular electrostatic zipping actuator for the application of a MEMS tunable capacitor
… MEMS switches, tunable capacitors (varactors) or resonators in general have lower loss and consume less power than their CMOS counterparts and have seen an increase of applications in high-value communication systems as well as low-cost commercial communication networks. Significant advances have …
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FOULING AND ITS MITIGATION ON HEAT EXCHANGER SURFACES BY ADDITIVES AND CATALYTIC MATERIALS
… was conducted with a 2.5 GHz microwave cavity resonator. The principle of electric dipole moment theories were used to analyse the sample solution that occurs as a function of calcium ion content. The sample was centrally positioned in the electric field of the TM010 mode of a resonant …
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The Dual Use of Power Distribution Networks for Data Communications in High Speed Integrated Circuits
… study a planar structure IC package based on the cavity resonator model (CRM) as a communication channel. Impedance characteristics of a planar structure IC package and other relevant components of an IC are important, and they are investigated for data transmission over power distribution …
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Transverse mode selection and brightness enhancement in laser resonators by means of volume Bragg gratings
… as spatial transverse mode filters in a laser resonator. Selection of the fundamental mode of a resonator is explored using transmission Bragg gratings (TBGs) as the spatial filter. Simulations and experimental measurements are made for a planar, 1 cm long resonator demonstrating near …
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Design and performance of resonant cavities for communication systems. The theory and performance of resonant cavities for application-, in mobile radio and base-stations in the VHF and UHF bands are investigated.
… in the design of microwave filters is usually a cavity resonator of which the most important factors are the Q, insertion loss and resonant frequency. However, a problem which frequently arises with cavity resonators is the accurate determination of these resonant characteristics complicated by …
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Non-invasive alcohol and glucose detection using microwave resonators
… sugar detection for diabetes using microwave resonators. The system is based on microwave resonators using very low power sources (lmW). This PhD project explores the limits and feasibility of a rectangular cavity resonator and a microstrip suspended ring resonator for use with water/ethanol …
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Critical analysis of a practical fourth order finite-difference time-domain algorithm for the solution of Maxwell's equations
… the application of Gaussian propagation, a cavity resonator, the radiation from a dipole antenna, antenna arrays, and the radar cross section calculation of a dielectric cube. Simulations of discontinuous boundaries are also explored in detail through the simulation of PEC objects and high …
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Planar groove gap waveguides
… unloaded Q-factor of a 33.5GHz PGGWG rectangular cavity resonator is measured to be 209. This is found to be comparable to an SIW resonator on the same substrate and frequency band. This work further explores the DC isolation property of the PGGWG by presenting electrically tunable PGGWG resonant …
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Inline microring reflector for photonic applications
The microring is a compact resonator that is used as a versatile building block in photonic circuits ranging from filters, modulators, logic gates, sensors, switches, multiplexers, and laser cavities. The Bragg grating is a periodic structure that allows the selection of a narrow bandwidth of …