Browsing by Subject "Electromagnetic fields"
Now showing 1 - 5 of 5
Results Per Page
Sort Options
Item Electromagnetic emissions reduction in a CAN transceiver system(Texas Tech University, 2004-05) Slayton, Jason RThis project deals with the emissions behavior of a Controller Area Network (CAN). CAN systems are widely used in automotive applications. Recently, CAN systems have expanded their applications to fields like medical, industrial automation and even high end home appliances. This paper discussed the important features of using CAN systems, one of which is the electromagnetic emissions behavior of the systems, especially in automotive applications. The motivation for the research discussed in this paper is to gain a better understanding of the effect different signals has on emissions. The most widely accepted solution to this problem is using a common mode capacitor on the signals. This reduces the variation of the common mode signal, which, in turn, reduces the emissions. This signal variation, along with other variations, was evaluated in this research. The objectives of this research are to quantify the effect each signal variation has on emissions.Item Laboratory modeling and analysis of aircraft-lightning interactions(Texas Tech University, 1982-08) Turner, Clyde DavidNot availableItem Physical modeling of the electromagnetic resonances of an aircraft-lightning interaction(Texas Tech University, 1984-05) Wood, Gerald WayneNot availableItem Silicon - polymer hybrid integrated microwave photonic devices for optical interconnects and electromagnetic wave detection(2015-05) Zhang, Xingyu, 1986-; Chen, Ray T.; Willson, Grant; Alu, Andrea; Akinwande, Deji; Poggio, EnricoThe accelerating increase in information traffic demands the expansion of optical access network systems that require high-performance optical and photonic components. In short-range communication links, optical interconnects have been widely accepted as a viable approach to solve the problems that copper based electrical interconnects have encountered in keeping up with the surge in the data rate demand over the last decades. Low cost, ease of fabrication, and integration capabilities of low optical-loss polymers make them attractive for integrated photonic applications to support futuristic data communication networks. In addition to passive wave-guiding components, electro-optic (EO) polymers consisting of a polymeric matrix doped with organic nonlinear chromophores have enabled wide-RF-bandwidth and low-power active photonic devices. Beside board level passive and active optical components, on-chip micro- or nano-photonic devices have been made possible by the hybrid integration of EO polymers onto the silicon platform. In recent years, silicon photonics have attracted a significant amount of attentions, because it offers compact device size and the potential of complementary metal–oxide–semiconductor (CMOS) compatible photonic integrated circuits. The combination of silicon photonics and EO polymers can enable miniaturized and high-performance hybrid integrated photonic devices, such as electro-optic modulators, optical interconnects, and microwave photonic sensors. Silicon photonic crystal waveguides (PCWs) exhibit slow-light effects which are beneficial for device miniaturization. Especially, EO polymer filled silicon slotted PCWs further reduce the device size and enhance the device performance by combining the best of these two systems. The potential applications of these silicon-polymer hybrid integrated devices include not only optical interconnects, but also optical sensing and microwave photonics. In this dissertation, the design, fabrication, and characterization of several types of silicon-polymer hybrid photonic devices will be presented, including EO polymer filled silicon PCW modulators for on-chip optical interconnects, antenna-coupled optical modulators for electromagnetic wave detections, and low-loss strip-to-slot PCW mode converters. In addition, some polymer-based devices and silicon-based photonic devices will also be presented, such as traveling wave electro-optic polymer modulators based on domain-inversion directional couplers, and silicon thermo-optic switches based on coupled photonic crystal microcavities. Furthermore, some microwave (or RF) components such as integrated broadband bowtie antennas for microwave photonic applications will be covered. Some on-going work or suggested future work will also be introduced, including in-device pyroelectric poling for EO polymer filled silicon slot PCWs, millimeter- or Terahertz-wave sensors based on EO polymer filled plasmonic slot waveguide, low-loss silicon-polymer hybrid slot photonic crystal waveguides fabricated by CMOS foundry, logic devices based on EO polymer microring resonators, and so on.Item The design, construction and testing of a prototype B sensor(Texas Tech University, 1982-05) Shannon, ScottNot available