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 18 of 18 for “"Coupled resonator"”.
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Coupled resonator based wireless power transfer for bioelectronics
… <p>In 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 …
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Synthesis of coupled resonator circuits with multiple outputs using coupling matrix optimization
Design techniques used for two-port coupled resonator circuits are extended in this thesis to multi-port coupled resonator circuits. Three-port coupled resonator power dividers and diplexers are demonstrated in particular. The design approach is based on coupling matrix optimization, and it allows …
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Reflected Group Delay method with Space Mapping Techniques for Coupled-Resonator Filter Design
… thesis, a novel design method for sequential resonator-coupled bandpass filter is proposed by implementing the reflected group delay design approach with space mapping techniques. The theory of the reflected group delay method is discussed in detail. An improvement to the traditional reflected …
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MEMS MULTI-DOF WEAKLY COUPLED RESONATOR BASED ON MODE LOCALIZATION FOR MASS CHANGE SENSING APPLICATIONS
… the potential of a 3-DOF mode localized weakly coupled resonator. A novel reversible method which exploits the usage of nanoparticles as well quantified mass changes is described. The mass sensitivity of the coupled resonator can be characterized accordingly. It has been demonstrated that a) the …
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A simple transformer-based resonator architecture for low phase noise LC oscillators
… investigates the use of a simple transformer-coupled resonator to increase the loaded Q of a LC resonant tank. The windings of the integrated transformer replace the simple inductors as the inductive elements of the resonator. The resonator topology considered in this project is a simpler …
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Development of waveguide filter structures for wireless and satellite communications
… performance taking advantage of recent cross-coupled resonator filters theory achievements such as the modular filter design approach using non-resonating nodes and inline extracted pole filters. Therefore, the core of the thesis presents the following stages of work: -- Solution of …
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Surface acoustic wave devices with low loss and high frequency operation
… are described. Two low-loss options are studied, coupled resonator filters for very narrow bandwidth applications and single phase unidirectional transducers (SPUDT) for fractional bandwidths up to about 1%. Both designs can be implemented with one quarter wavelength transducer geometries at …
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Static Metasurfaces Reflectors with Independent & Complete Control of Magnitude & Phase
This thesis presents a static coupled resonator design capable of near complete control of the complex reflectance. Designed in the Ka band with no lumped elements required. The UC design is examined and demonstrated in several different surfaces, such as a multi-beam steering surface, capable of …
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Statistical Modeling of the Effects of Process Variations on Silicon Photonics
… on different components including Y-branches and coupled resonator optical waveguides. For the Y-branch, we use ensemble simulations to develop behavioral statistical models that can predict the behavior in the presence of different line edge roughness parameters. In the case of coupled resonator …
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Graphene Integrated Metamaterial Devices for Terahertz Modulation
… thesis. The steps to build a basic split ring resonator (SRR) and graphene amplitude modulator device are discussed, starting with the design process using finite element electromagnetic simulation, before outlining the fabrication steps required to build the device, and finally performing the …
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Practical realisation of multiband planar filters on multilayer substrates
… approaches Investigations on narrowband with coupled resonator filters representation and wide-band with quasi-lumped element filters representation of up to quad-bands based on reactance transform method are undertaken. With the emphasis on practical aspects such as losses and selectivity, …
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Non-Hermitian topological states in photonic systems
… which robust light transport can be achieved. In coupled resonator optical waveguides, I demonstrate the formation of topological defect states in one dimensional systems and topological edge states in two dimensional systems, which only occur for a system with open boundaries. Since a …
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Tunable microwave filters using ferroelectric thin films
… about 8 GHz to 12 GHz with 10 V bias of only one resonator. Two pole and four pole coupled resonator bandpass filters with discrete BST or GaAs varactors as tuning elements are implemented in a frequency range of 1 - 3 GHz. The filters based on BST parallel plate capacitors show an insertion loss …
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Bandwidth enhancement techniques for low-profile antennas: Theory and experiment
… antennas. The first method involves the use of coupled resonators. In particular, two cavity-backed slot antennas are coupled through an aperture in a common wall. One cavity-backed slot antenna, of the coupled antenna system, is driven. This coupled antenna system is analyzed using two …
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Ultrasensitive CMOS-compatible lab-on-a-chip integrated photonic sensors with wideband operation
… high-quality-factor (high-Q) Si3N4 spiral-based coupled-resonator devices and high-Q SiC slot-ring resonators at near-IR wavelengths are demonstrated with high detection capability. Additionally, an integrated mid-IR metasurface (MS) on a SiC platform with relatively sharp transmission peaks …
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Miniaturised bandpass filters for wireless communications
… presents a novel compact planar dual-mode resonator with several interesting and attractive features. Generally, planar microwave dual-mode resonators are known to half the filter footprint. However, it is found that the proposed resonator is capable of achieving further size reductions. In …
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Modeling of mechanical energy dissipation of low-dimensional resonators
… is a vibrating mechanical element, known as the resonator. The performance of the NEMS critically depends on the mechanical energy dissipated by the resonator. Studies on dissipation are important because an understanding of the loss mechanisms can suggest ways to mitigate it. In most practical …