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Articles 1 - 8 of 8
Full-Text Articles in Electrical and Computer 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 …
Beam Steerable Reconfigurable Antenna With Smart Rf Switching On 3d Parasitic Level, Mohammad Ababil Hossain
Beam Steerable Reconfigurable Antenna With Smart Rf Switching On 3d Parasitic Level, Mohammad Ababil Hossain
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Traditional antennas have a lot of limitations as their performance is usually fixed by their initial geometry. On the other hand, modern communication systems are getting way to complicated compared to their earlier counterparts. This necessitates some special types of smart or reconfigurable antennas, which can dynamically adapt to the requirements of the communication systems more effectively. Using conventional single functional antennas is therefore not an efficient approach in these sort of communication systems. Considering all these factors, in this thesis, a beam steerable reconfigurable antenna system is presented that can yield the radiation patterns of multiple antennas with a …
Micro-Electro-Mechanical Systems (Mems) Integrated Frequency Reconfigurable Antenna, Abdul Zohur
Micro-Electro-Mechanical Systems (Mems) Integrated Frequency Reconfigurable Antenna, Abdul Zohur
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This thesis investigates the concept of reconfigurability of an antenna’s properties, such as frequency, radiation pattern, and polarization, for a planar inverted-F antenna (PIFA), by the use of radio frequency micro-electro-mechanical system (RF MEMS) switches. This research work has been conducted at the Micro/Nano Electro Mechanical Systems (µN _eMS) Laboratory at Utah State University. In this thesis, two electrically small frequency reconfigurable antenna designs have been presented with two and three modes of operation with central frequencies of 718 and 4960 MHz and of 857,809 and 4960 MHz, respectively. The maximum frequency tunable ratio achieved in these designs …
A Multifunctional Solar Panel Antenna For Cube Satellites, Olutosin C. Fawole
A Multifunctional Solar Panel Antenna For Cube Satellites, Olutosin C. Fawole
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This work presented the design of a single antenna structure that can perform the functions of about four antennas. The antenna is to be applied on a new kind of very tiny satellites. These satellites are called CubeSats. In contrast to an ordinary antenna that works at a single frequency band, the antenna designed will be able to work at about three different usable frequencies. In addition, it will be possible to make the waves emitted by the antenna to have multiple senses of rotation or no rotation at all. The multiple functional capability of the antenna will lead to …
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 Study On Conformal Antenna Solutions For Cube Satellites, Maryam Jamali
A Study On Conformal Antenna Solutions For Cube Satellites, Maryam Jamali
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This master's thesis presents a study on two types of conformal antennas for the use on cube satellites (CubeSats). The two antenna solutions are including slot and microstrip patch antennas. CubeSats have been one of the most important vehicles for space exploration due to their small sizes and very low payload. At the same time, a challenge rises when allocating extremely limited surface real estate to space instrument, solar cells, and antennas. The most effective solution for such a challenge is to design antennas such that they do not block solar cells or compete for space with solar cells. Accordingly, …