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Design and analysis of a frequency reconfigurable antenna for wireless communication at 5 GHz
(University of Missouri--Columbia, 2016)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] In this research, a frequency reconfigurable antenna was simulated and analyzed. The industry standard simulation suits (CST) was used in the design ...
Design and analysis of CPW-fed compact planar antennas for ultra wideband communication systems
(University of Missouri--Columbia, 2016)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] In this research, three new designs of planar compact ultra-wideband (UWB) antennas have been studied, simulated, and experimentally measured. Their ...
Maximizing terahertz pulse amplitude from low temperature gallium arsenide photo conductive semiconductor switch
(University of Missouri--Columbia, 2011)
A signal is produced by the photoconductive action in a PCSS, which travels through the bulk to the metallic contacts and is radiated through the electrodes of the PCSS. The simulation analysis was done for the semiconductor ...
Optimizing antenna gain with a metamaterial filter
(University of Missouri--Columbia, 2011)
Metamaterials are man-made structures, usually designed by placing electromagnetic resonators, such as split ring resonators (SRRs), in a periodic array. Metamaterials also exhibit lensing properties, and, when placed next ...
Effects of front and bottom texturings on gallium arsenide solar cell characteristics
(University of Missouri--Columbia, 2012)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] The Gallium Arsenide solar cells are of particular interest in many applications due to its advantages over silicon. Its high absorptivity requires a ...
Design and analysis of reconfigurable phased array antenna for wireless local area network applications
(University of Missouri--Columbia, 2014)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.]
Design and analysis of a metamaterial with high refractive index at dual band frequencies
(University of Missouri--Columbia, 2012)
The concept of a single frequency band, single high-refractive-index metamaterial has been extended and applied in the design of dual frequency band, dual high-refractive-index metamaterials in the THz regime. The structure ...
Comparative study of ballistic transport in Si and GaAs using non equilibrium Green's function formalism
(University of Missouri--Columbia, 2012)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] The simulation study presented in this research has two basic objectives. The first objective is to establish a consistency in the results for quantum ...
Design and analysis of miniaturized implantable and wearable microstrip antennas
(University of Missouri--Columbia, 2012)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] There is an increasing effort by hospitals, doctors and healthcare service providers to cut down the ever increasing cost of health care. One area of ...
Design, simulation, and analysis of reconfigurable antennas in GHz regime
(University of Missouri--Columbia, 2013)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] This research focuses on the design and analysis of a reconfigurable antenna where the radiation pattern and its characteristics are altered in each ...
Wearable energy-harvesting micro devices /
(University of Missouri--Columbia, 2016)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] The focus of this dissertation is wearable energy-harvesting mircro devices. They are designed to harvest energy from the surrounding environment to ...
Asymmetric quantum well structures for enhanced infrared photon absorption
(University of Missouri--Columbia, 2013)
Compared to inter-band transition for photon absorption in a quantum wells, intra-band (or inter-subband) transitions in heterojunction (GaAs/InP) quantum wells can provide access to a broader range of wavelengths for ...
Design and application of conformal patch antenna for near-field imaging and object detection
(University of Missouri--Columbia, 2013)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Compact and low cost planar and conformal patch antennas were designed, fabricated and analyzed for ultra-wideband characteristics. It was also ...
Design and analysis of super wideband microstrip antennas for parameter optimization
(University of Missouri--Columbia, 2016)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] In this work, two super wideband microstrip antennas have been proposed, studied, and analyzed through industry standard simulation suite. The first ...
Convolutional Neural Network architectures for digit recognition system
(University of Missouri--Columbia, 2016)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Rapidly evolving of Convolutional Neural Networks (CNNs) appeals and endeavors us to explore and discover various CNN model's robustness leading to ...
Simulation algorithms for fractal radiation
(University of Missouri--Columbia, 2009)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] This thesis presents a method to analyze a series of structures, referred to as fractals, that radiate electromagnetic waves. The fractal series are ...
Optimization of charge collection efficiency in MSM photodetector
(University of Missouri--Columbia, 2005)
The effects of different geometries, heights and concentrations per unit area of gratings in the active region of a metal semiconductor metal photo-detector have been analyzed for enhanced charge collection through ...
Charge collection mechanisms in a sub-micron grated MSM photodector: field analysis
(University of Missouri--Columbia, 2005)
Enhanced charge collection mechanisms due to sub-micron wall-like silicon structures on the active surface of a metal-semiconductor-metal (MSM) photodetector were studied through the analysis of transmitted electromagnetic ...
Silicon carbide as a photoconductive switch material for high power applications
(University of Missouri--Columbia, 2006)
This research work discusses the effort at the Electrical and computer engineering (ECE) department at the University of Missouri Columbia (UMC) in developing this technology through simulation and experiments with SiC ...
Performance analysis of high power photoconductive switch at elevated temperature
(University of Missouri--Columbia, 2005)
This project deals with the analysis of high power radio frequency effects on a non-linear opposed contact GaAs photoconductive semiconductor switch, used in high power microwave generation. Specifically, effects of heating ...