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 15 of 15 for “"Cavity resonators"”.
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Forced oscillations of electromagnetic cavity resonators
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1941.
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Compact microwave filter designs based on cavity resonators
Cavity resonators are widely used in microwave filters and multiplexers due to their high quality factor and high power handling capability. Compact designs of these filters are important for practical applications, as they are generally bulky. In this thesis, two types of compact microwave filter …
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Cavity resonators and wave guides containing periodic elements
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1943.
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NIR silicon photodetector enhancement using photonic crystal cavity resonators
… silicon in conjunction with a photonic crystal cavity (PhCC) to enhance light absorption for efficient sensing. We present a cost-effective alternative to the current III-V detectors. By adding a 2D-PhC resonator layer, surface-illuminated light can be confined within a 10 micron region with …
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Finite element methods for the electromagnetic modeling of waveguide discontinuities and cavity resonators
Restriction data tranferred 2014-07-01T11:29:27-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission
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Additive manufacturing of novel metal microwave components for space application
… waveguide filters using de formed elliptical cavity resonators (four variations of resonators and topologies), dual band multimode waveguide filters using elliptical cylinder cavity resonators, multiband waveguide filters using an in-band transmission zeros approach (four variations of res …
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Synthesis, design, and fabrication techniques for reconfigurable microwave and millimeter-wave filters
… filters caused by the use of lossy tunable resonators. This theory is used in conjunction with silicon-micromachining fabrication technology to realize the first ever tunable bandstop filter at W-Band frequencies, as well as a state-of-the-art Ka-band tunable bandstop filter.</p> <p>The …
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Efficient modeling of passive electronic devices using the finite-difference time domain method
… electronic packages, microstrip antennas and cavity resonators, that are analyzed using the Finite Difference Time Domain (FDTD) algorithm for solving Maxwell's equations. One of the fundamental problems associated with analyzing this class of structures is that accurate modeling of their fine …
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The beam modes of general optical cavities
… the eigenvalue method for computing the modes of cavity resonators. A matrix formulation of the integral equation describing the modes of a resonator is a powerful and flexible method of solution, in particular, when compared to iterative techniques. The matrix formulation includes improvements in …
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Modeling and characterization of non-ideal effects in high-performance RF MEMS tuners
… diaphragm tuners used in tunable cavity resonators/filters. Furthermore, the temperature sensitivity issue results from the mismatch of material properties between the structure material and substrate has been discussed and a thermally-stable RF MEMS tuner based on a nonuniform …
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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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Online Electromagnetic Wave Monitoring System for Petroleum Industry Applications
… pipeline. These sensors are based on cylindrical cavity, and they use the resonant frequencies related to changes of permittivity to detect and measure (oil, gas, and water) components flowing in a pipeline. Special emphasis has been given to three main design principles. The principle of …
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Novel quantum dot and nano-entity photonic structures
… elements, micro-ring structures, vertical cavity resonators and other advanced photonic structures comprising quantum dot nanocrystals and nano-entities are investigated. A new photonic sensing scheme is proposed and demonstrated here for remote, spatially-localized sensing. It comprises a …
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Filter Synthesis and Design Techniques for Highly Adaptable Systems
<p>Software defined radio and cognitive radio (SDR/CR) are promising concepts toward more optimally using the electromagnetic spectrum for communications and data transfer. These systems are highly agile in terms of modulation technique and frequency of operation due to early digitization and …
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Investigation of microwave cavity applicators for plasma assisted CVD diamond synthesis and plasma assisted combustion
Thesis (Ph. D.)--Michigan State University. Electrical Engineering, 2010