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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 20 of 37 for “"RF MEMS"”.
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RF-MEMS switches for reconfigurable antennas
… on multiple frequency bands and patterns. RF-MEMS is a promising technology that has the potential to revolutionize RF and microwave system implementation for next generation telecommunication applications. Despite the efforts of top industrial and academic labs, commercialization of RFMEMS …
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RF MEMS switches : survey and analysis
Microelectromechanical systems known as MEMS, are an enabling technology that describe a field capable of creating very small electromechanical devices with feature sizes on the order of microns, or 10-6 meters. MEMS technology has received considerable attention recently as a way to produce …
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Stochastic multiphysics modeling of RF MEMS switches
… in particular have been shown to have superior performance characteristics over traditional semiconductor switches. However, their widespread insertion in integrated electronics is critically dependent on a thorough understanding of two broad issues - manufacturing process variations and failure …
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Development of a spring-less RF MEMS switch
… on the development of a novel 77GHz low loss MEMS switch with a mechanically unrestrained armature, over a RF transmitting coplanar waveguide. Electrostatic actuation is used during the switching operation. The attractive force from the electrostatic field is generated by a pair of the …
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Novel Design Solutions for High Reliability RF MEMS Switches
… design and characterization of Radio-Frequency (RF) Micro-Electro-Mechanical System (MEMS) switches for space applications. The work was inspired and supported by the European Space Agency (ESA) Contract No. ITT AO/1-5288/06/NL/GLC ?High Reliability Redundancy Switch?. The main purpose of the …
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Electromechanical behavior of PZT thin film composites for RF-MEMS
Made available in DSpace on 2010-01-06T16:41:50Z (GMT). No. of bitstreams: 3 license.txt: 4071 bytes, checksum: e75615bc0da3d84c9388e446b2f8f791 (MD5) Yagnamurthy_Sivakumar.pdf: 7086653 bytes, checksum: 811d92a8497f2ba0a1e4f56aceee8970 (MD5) Yagnamurthy_Sivakumar.doc: 8453120 bytes, checksum: …
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Lithium niobate RF-MEMS oscillators for IoT, 5G and beyond
… (LiNbO3) radiofrequency microelectromechanical (RF-MEMS) oscillators for internet-of-things (IoT), 5G and beyond. The dissertation focuses on solving two main problems found nowadays in most of the published works: the narrow tuning range and the low operating frequency (sub 3 GHz) acoustic …
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Design of width-extensional, piezoelectric RF MEMS resonators and filters
Existing width-extensional, piezoelectric resonators (LBARs) suffer from high motional resistance and susceptibility to manufacturing disorder. Attempts to lower motional resistance by connecting many LBARs electrically in parallel fail because such schemes are highly susceptible to the disorder …
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Applications of Non-linearities in RF MEMS Switches and Resonators
… of wireless ubiquity. To support this trend, the RF (Radio Frequency) front end must be capable of processing a range of wireless signals (cellular phone, data connectivity, broadcast TV, GPS positioning, etc.) spanning a total bandwidth of nearly 6 GHz. This warrants the need for …
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Modeling and characterization of non-ideal effects in high-performance RF MEMS tuners
… communication system demand for multi-band RF front-ends. Reconfigurable RF devices based on MEMS technology have emerged with the potential to significantly reduce the system complexity and cost. Robust operation of RF MEMS tuners under the non-ideal effects due to fabrication uncertainties …
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A Radiation Reconfigurable Magnetic Line Source Antenna: Modeling, Integration With RF MEMS, and Applications
… of the reconfigurable antenna with packaged RF MEMS switches (S-band design) has been implemented (bias structures, control lines, etc.) and measured results are provided. This continues with discussion on the fabrication (direct integration) of the antenna with RF MEMS switches (Ka-band …
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Design, Fabrication and Testing of Conformal, Localized Wafer-level Packaging for RF MEMS Devices
… a device cavity appropriate for Radio-Frequency (RF) Micro- Electro-Mechanical (MEMS) devices, such as resonators and switches. These devices require application specific packaging to facilitate their integration, provide protection from the environment, and control interactions with other …
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Mixed-domain simulation and hybrid wafer-level packaging of RF-MEMS devices for wireless applications
… a domini fisici misti per dispositivi RF-MEMS, che la definizione di un processo di fabbricazione ad-hoc per il packaging e l’integrazione degli stessi. Riguardo al primo argomento, sarà mostrato nel dettaglio lo sviluppo di una libreria di modelli MEMS all’interno dell’ambiente di …
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Multilayer Micromachined RF MEMS Filters at Ka and L/S Band For On-Board Satellite Communication Systems
… for the realization of Radio Frequency (RF) bandpass filters. The work has been inspired and supported by the European Space Agency (ESA) Contract No. 22706/09/NL/GLC of the ARTES 5 Workplan 2008 “Micro-machined Filters in Multi-layer Technology for Satellite On-board Communication …
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Development of Compound Semiconductor FET and Integrated Low -Voltage RF MEMS Switch Technology for Reconfigurable MMIC Applications
… GaAs MESFET, the AlGaN/GaN HEMT, and the RF MEMS switch. The MESFET is a relatively mature technology that has proven to be a low-cost solution for many MMIC uses, and this work will describe enhancement- and depletion-mode 0.12-mum-gate device development with ft higher than 120 GHz. Wide …
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DESIGN OF MONOLITHICALLY INTEGRATED RF-MEMS MULTI-FUNCTIONAL PASSIVES FOR HYBRID BEAMFORMING ARCHITECTURES IN BEYOND-5G AND 6G SCENARIOS
… complexity, the need of miniaturized, high-performance and broadband hardware components is still an open issue. Passive Radio Frequency (RF) components in MicroElectroMechanical-Systems technology (RF-MEMS) offer notable and broadband electrical performances, while maintaining the marked …
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Fabrication process changes for performance improvement of an RF MEMS resonator : conformable contact lithography, Moiré alignment, and chlorine dry etching
… presents fabrication process improvements for a RF MEMS resonator for the purpose of improving the quality factor (Q) and extending the frequency range. The process changes include the use of conformable contact lithography (CCL) and chlorine-based dry etching for improved fine-feature patterning …
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Measurement and model of a radio frequency microelectromechanical switch
… fabrication of microelectromechanical systems (MEMS) has been introduced. One potential application of this process is a radio frequency (RF) MEMS switch. This thesis provides an overview of the measurement and modeling techniques used to verify the functionality of an RF MEMS switch that was …
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Fundamental design principles of novel MEMS based "Landau" switches, sensors, and actuators : Role of electrode geometry and operation regime
<p>Microelectromechanical systems (MEMS) are considered as potential candidates for "More-Moore" and "More-than-Moore" applications due to their versatile use as sensors, switches, and actuators. Examples include accelerometers for sensing, RF-MEMS capacitive switches in communication, …
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