Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 6 of 6
Full-Text Articles in Engineering
Investigation Of Graphene Interconnections For Multifunctional Reconfigurable Antenna Beam Steering, Joshua R. Perkins
Investigation Of Graphene Interconnections For Multifunctional Reconfigurable Antenna Beam Steering, Joshua R. Perkins
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
In high frequency, high-performance wireless communications, direct line of sight antennas are common. The issue with the line of sight antennas is the need to redirect the physical antenna to achieve the best possible reception. Classical redirections are done by mechanical movements: hand tuning and motors. Our multi-functional re-configurable antenna (MRA) concept allows for electrical and non-mechanical antenna reorientation. This work investigates two important concepts in the development and enhancement of future MRA devices: special, non-interfering, control signal circuitry and nano-sized switching devices that are controlled by the special circuitry. The investigation was conducted with the use of commercially available …
Application Aware Reconfigurable Antennas And Arrays For 5g And Beyond Wireless Communication Systems, Md Asaduzzaman Towfiq
Application Aware Reconfigurable Antennas And Arrays For 5g And Beyond Wireless Communication Systems, Md Asaduzzaman Towfiq
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Antennas enable wireless communication by transmission and reception of electromagnetic (EM) signals, which carry information in space. Signal reception and hence the quality of service depends significantly on the antenna properties, e.g. radiation pattern, operational frequency, and polarization. Legacy antennas, with their fixed properties, fail to adapt to the changing environment and degrade signal quality. Reconfigurable antennas (RAs) capable of changing their properties dynamically increase the capacity and data rate of wireless systems while offering a compact design. However, these advantages come at the cost of increased complexity compared to legacy antennas. Therefore it is important to design RAs with …
Multifunctional Reconfigurable Antennas And Arrays Operating At 60 Ghz Band, Abdurazag Mohamed Khalat
Multifunctional Reconfigurable Antennas And Arrays Operating At 60 Ghz Band, Abdurazag Mohamed Khalat
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
In this digital era, the demand for faster, reliable, and adaptive wireless communication systems is increasing. Various factors can affect the signal propagation in the wireless medium, such as weather, broadcast environment, physical obstructions, etc. This study aims to improve the antenna performance by means of dynamically altering its properties so that it can adapt to different environments and communication scenarios. This study is not resorting in a traditional antenna design, but rather explores an alternative approach known as the multifunctional reconfigurable antennas (MRAs). Unlike its predecessor, i.e., legacy antennas, MRAs can dynamically change its operation frequency, radiation pattern, and …
Multi-Functional Reconfigurable Antenna Development By Multi-Objective Optimization, Xiaoyan Yuan
Multi-Functional Reconfigurable Antenna Development By Multi-Objective Optimization, Xiaoyan Yuan
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Antennas are the most essential and significant elements of any wireless communication system. The most common antennas used in wireless communication systems include dipoles/monopoles, horn antennas, loop antennas, and micro-strip antennas. Each type possesses inherent advantages and disadvantages that make them satisfactory for particular applications. The properties of these antennas, however, are fixed by the initial design and cannot be changed. These fixed properties impose restrictions on the overall system performance as the antenna cannot adapt its characteristics in response to the changing propagation parameters of the wireless medium. A reconfigurable antenna, on the other hand, can dynamically change its …
A Finite Domain Constraint Approach For Placement And Routing Of Coarse-Grained Reconfigurable Architectures, Rohit Saraswat
A Finite Domain Constraint Approach For Placement And Routing Of Coarse-Grained Reconfigurable Architectures, Rohit Saraswat
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Scheduling, placement, and routing are important steps in Very Large Scale Integration (VLSI) design. Researchers have developed numerous techniques to solve placement and routing problems. As the complexity of Application Specific Integrated Circuits (ASICs) increased over the past decades, so did the demand for improved place and route techniques. The primary objective of these place and route approaches has typically been wirelength minimization due to its impact on signal delay and design performance. With the advent of Field Programmable Gate Arrays (FPGAs), the same place and route techniques were applied to FPGA-based design. However, traditional place and route techniques may …
A Comprehensive Integration And Analysis Of Dynamic Load Balancing Architectures Within Molecular Dynamics, Christopher Reed Rogers
A Comprehensive Integration And Analysis Of Dynamic Load Balancing Architectures Within Molecular Dynamics, Christopher Reed Rogers
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The world of nano-science is an ever-changing field. Molecular Dynamics (MD) is a computational suite of tools that is useful for analyzing and predicting behaviors of substances on the molecular level. The nature of MD is such that only a few types of computations are repeated thousands or sometimes millions of times over. Even a small increase speedup or efficiency of an MD simulator can compound itself over the life of the simulation and have a positive and observable effect. This thesis is the end result of an attempted speedup of the MD problem. Two types of MD architectures are …