Browsing Theses by Supervisor "Mansour, Raafat"
Now showing items 1-20 of 22
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Aluminum Nitride SAW Resonators
(University of Waterloo, 2017-05-17)Numerous devices need filters for capturing signals and then conditioning them in communications and wireless systems. For several decades, microwave filters have been the center of attention for this type of signal ... -
CMOS-MEMS Scanning Microwave Microscopy
(University of Waterloo, 2017-10-25)This thesis presents the design, fabrication and experimental validation of an integrated dual-mode scanning microwave microscopy (SMM)/Atomic Force Microscopy (AFM) system that does not require the use of a conventional ... -
Design of an Integrated Electrostatic Atomic Force Microscope
(University of Waterloo, 2018-05-22)The need for investigation and characterization of physical, chemical and structural properties of material surfaces at the micro and nano scales led to the invention of Atomic Force Microscopy (AFM) in 1986 as a successor ... -
Development of SOI-based Thermally Actuated Micromirror
(University of Waterloo, 2019-09-23)Micromirror is a Micro-Electro-Mechanical Systems (MEMS) device used to steer light by tilting or displacing a reflective surface. It is applied in numerous scanning applications and display technologies such as Light ... -
Development of Tunable RF Integrated Passive Devices
(University of Waterloo, 2017-05-11)Radio frequency (RF) lumped elements are crucial building blocks for designing any type of passives circuits for RF front-end applications in mobile devices. In particular, high-quality (Q) factor lumped elements are ... -
Electronically Tunable Filters
(University of Waterloo, 2016-06-17)Microwave filters are essential building blocks in communications systems. As the communications industry evolves, smaller and more flexible filters with a high quality factor (high-Q) are in great demand. The deployment ... -
High-Performance Reconfigurable Piezoelectric Resonators and Filters for RF Frontend Applications
(University of Waterloo, 2022-09-08)A conventional RF frontend module consists of many filters where each filter is allocated for a specific frequency band. These filters are connected through multiplexing switch networks to support multi-band wireless ... -
High-Q Multi-band Filters
(University of Waterloo, 2019-09-05)Recent development of multifunctional communication systems capable of processing large amount of data has triggered the demand for novel payload configurations with advanced filtering functions. To increase the payload ... -
MEMS-Based Millimeter Front-end for Automotive Radar Applications
(University of Waterloo, 2018-01-18)Automotive front-end radars are key components in modern vehicles. They are used in automatic cruise control (ACC) for advanced drive-assistance and security functions, including collision-avoidance systems. Automotive ... -
Millimeter-Wave Reconfigurable CMOS-MEMS Integrated Devices
(University of Waterloo, 2017-05-18)The millimeter-wave spectrum has sparked interest recently as a promising alternative to meet bandwidth requirements for wireless local area networks, vehicular radars, short-range multi-Gb/s links, and next-generation ... -
MIT/PCM-based RF Switches for Tunable Filter Application
(University of Waterloo, 2019-08-23)Tunable filters are promising for reducing the size of communication systems by replacing switch filter bank, also they are gaining more attention for satellite applications which will need to change the frequency bands. ... -
Monolithic Integrated Reconfigurable RF-MEMS Phase Shifters
(University of Waterloo, 2022-08-26)Micro-electro-mechanical systems (MEMS) actuators are a key technology that have been utilized in many real-world applications. This thesis investigates the application of MEMS technology in the design of RF components and ... -
Monolithically Integrated Phase Change Material GeTe-Based RF Components for Millimeter Wave Applications
(University of Waterloo, 2020-05-22)RF switches are the fundamental building blocks for realizing reconfigurable front-ends in communication devices. Currently available RF switches are dominated by semiconductor technology which, while performing adequately ... -
Reactive RF Sputtering of VO2
(University of Waterloo, 2016-01-25)There are multiple oxides that exhibit metal-to-insulator transition, VO2 is one of them. What makes it unique is that the transition occurs at near room temperature, thereby making the energy cost of switching very low. ... -
Reconfigurable Cryogenic Microwave Devices Using Low Temperature Superconducting rf-SQUIDs
(University of Waterloo, 2022-11-21)In the physical implementation of modern superconducting quantum computing systems, microwaves play a significant role in the control and measurement of qubits. The advances towards the use of microwaves in the quantum ... -
Reconfigurable Power Combiner and Miniature Filter
(University of Waterloo, 2020-01-23)Microwave communication systems have undergone tremendous changes in the past two decades. There is an ever-growing demand for devices with higher performance, lower cost and smaller size. Hence, more focus is given to ... -
RF MEMS-Based Frequency Dependent Power Limiters
(University of Waterloo, 2018-04-27)Microwave power limiters are passive devices that are widely used to protect receivers from large interfering signals. Conventional radio frequency (RF) power limiters attenuate both desired and undesired signals in the ... -
SOI RF-MEMS Based Variable Attenuator for Millimeter-Wave Applications
(University of Waterloo, 2019-05-22)The most-attractive feature of microelectromechanical systems (MEMS) technology is that it enables the integration of a whole system on a single chip, leading to positive effects on the performance, reliability and cost. ... -
Substrate Integrated Waveguide (SIW) and Superconducting Filters
(University of Waterloo, 2022-04-29)Substrate integrated waveguides (SIW) provide an excellent compromise between size and loss reduction for applications in planar circuits. SIW filters provide a better Q-factor than microstrip filters and a significant ... -
Theoretical and Experimental Analysis of Resistor Network for Use in Superconducting Analog-to-Digital Applications
(University of Waterloo, 2019-01-23)Superconducting micro-electronics (SME) technology is capable of realizing extremely high speed digital receivers performing direct digitization of microwave signals with very low power consumption. SME technology uses ...