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Electrical and Computer Engineering

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Florida Institute of Technology

Electrical Engineering and Computer Science Faculty Publications

2015

Articles 1 - 6 of 6

Full-Text Articles in Engineering

Impedance-Matching Analysis In Ir Leaky-Wave Antennas, Navaneeth Premkumar, Yuancheng Xu, Brian A. Lail Aug 2015

Impedance-Matching Analysis In Ir Leaky-Wave Antennas, Navaneeth Premkumar, Yuancheng Xu, Brian A. Lail

Electrical Engineering and Computer Science Faculty Publications

Planar leaky-wave antennas (LWA) that are capable of full-space scanning have long since been the pursuit for applications including, but not limited to, integration onto vehicles and into cameras for wide-angle of view beam-steering. Such a leaky-wave surface (LWS) was designed for long-wave infrared frequencies with frequency scanning capability. The LWS is based on a microstrip patch array design of a leaky-wave impedance surface and is made up of gold microstrip patches on a grounded zinc sulphide substrate. A 1D composite right/left-handed (CRLH) metamaterial made by periodically stacking a unit cell of the LWS in the longitudinal direction to form …

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Infrared Surface Phonon Polariton Waveguides On Sic Substrate, Yuchen Yang, Franklin Muriuki Manene, Brian A. Lail Aug 2015

Infrared Surface Phonon Polariton Waveguides On Sic Substrate, Yuchen Yang, Franklin Muriuki Manene, Brian A. Lail

Electrical Engineering and Computer Science Faculty Publications

Surface plasmon polariton (SPP) waveguides harbor many potential applications at visible and near-infrared (NIR) wavelengths. However, dispersive properties of the metal in the waveguide yields weakly coupled and lossy plasmonic modes in the mid and long wave infrared range. This is one of the major reasons for the rise in popularity of surface phonon polariton (SPhP) waveguides in recent research and micro-fabrication pursuit. Silicon carbide (SiC) is a good candidate in SPhP waveguides since it has negative dielectric permittivity in the long-wave infrared (LWIR) spectral region, indicative that coupling to surface phonon polaritons is realizable. Introducing surface phonon polaritons for …

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Multi-Coupled Resonant Splitting With A Nano-Slot Metasurface And Pmma Phonons, Michael F. Finch, Brian A. Lail Aug 2015

Multi-Coupled Resonant Splitting With A Nano-Slot Metasurface And Pmma Phonons, Michael F. Finch, Brian A. Lail

Electrical Engineering and Computer Science Faculty Publications

Coupled-resonances can be used in applications that include, but are not limited to, surface-enhanced infrared spectroscopy (SEIRS), surface-enhanced Raman spectroscopy (SERS), biosensing, and index sensing. Fano resonance in analogue plasmonic systems has been described as the coupling of a bright (superradiant) mode and a dark (subradiant) mode via the near field.Dark and bright mode interactionsareinvestigated with the use of a Fano resonant metamaterial (FRMM) where the metamaterial is a dual nano-slot metasurface on a silicon cavity. The FRMM is numerically simulated using Ansys High Frequency Structure Simulator (HFSS). The FRMM is coupled to the carbon double bond in polymethyl methacrylate …

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Collection Efficiency For Millimeter And Submillimeter Wave Antenna-Coupled Detection, Yuancheng Xu, Brian A. Lail Apr 2015

Collection Efficiency For Millimeter And Submillimeter Wave Antenna-Coupled Detection, Yuancheng Xu, Brian A. Lail

Electrical Engineering and Computer Science Faculty Publications

The goal in the design of an efficient and low-noise antenna coupled receiver is to achieve a maximal capture cross section for the incident electromagnetic radiation compared to the dimensions of the sub-wavelength sized sensor loading the antenna. Collection efficiency captures this concept of power output/input and is made up of several subefficiencies. In the ideal case all of the available, incident power is collected and transferred to the load. However, many of the fundamental limits of antennas are based on theory describing the transmitting mode, whereas certain questions remain open for receiving antennas. Textbook antenna theory predicts that only …

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Near Real-Time Operation Of Public Image Database For Ground Vehicle Navigation, Ehsan A. Ali, Samuel Peter Kozaitis Feb 2015

Near Real-Time Operation Of Public Image Database For Ground Vehicle Navigation, Ehsan A. Ali, Samuel Peter Kozaitis

Electrical Engineering and Computer Science Faculty Publications

An effective color night vision system for ground vehicle navigation should operate in near real-time to be practical. We described a system that uses a public database as a source of color information to colorize night vision imagery. Such an approach presents several problems due to differences between acquired and reference imagery. Our system performed registration, colorizing, and reference updating in near real-time in an effort to help drivers of ground vehicles during night to see a colored view of a scene.

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Improved Colorization For Night Vision System Based On Image Splitting, Ehsan A. Ali, Samuel Peter Kozaitis Feb 2015

Improved Colorization For Night Vision System Based On Image Splitting, Ehsan A. Ali, Samuel Peter Kozaitis

Electrical Engineering and Computer Science Faculty Publications

The success of a color night navigation system often depends on the accuracy of the colors in the resulting image. Often, small regions can incorrectly adopt the color of large regions simply due to size of the regions. We presented a method to improve the color accuracy of a night navigation system by initially splitting a fused image into two distinct sections before colorization. We split a fused image into two sections, generally road and sky regions, before colorization and processed them separately to obtain improved color accuracy of each region. Using this approach, small regions were colored correctly when …

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