Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 338 for “"Transmission-line"”.
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Resonant transmission line drivers
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2000.
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Dielectric measurement based microstrip transmission line
… proposed technique present a simple microstrip transmission line method for the broadband radio frequency characterization of dielectric constant of non-dispersive materials. A microstrip line having impedance other than 50 Ω is designed and material under test is used as the substrate. The …
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Wideband high-power transmission line pulse transformers
Geometric transformers are often used in radar and communications systems to transition between signal driving and radiating elements that terminate in significantly different geometries with unity input/output impedance. This work demonstrates the design and construction process of a geometric …
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Automated transmission line fault analysis the SMT method
Analyzing faults from transmission lines automatically using a computer is a complex, multi-step process that takes a literal understanding of how the computer reads the data. While there are many ways to approach this problem (e.g.. Inductance Calculation), the Square Mean Test method allows for …
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Liquid level measurement using a coplanar transmission line
The coplanar line has been used very successfully as an element in microwave circuits. Small size, high Q-factor, and accurate reproduction, are some of its many advantages. The coplanar transmission lines discussed in this report, are targeted at liquid level measurement, and are typically 30 cm. …
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Application of a resonant transmission line clock driver
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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Integrated Frequency-Selective Conduction Transmission-Line EMI Filter
The multi-conductor lossy transmission-line model and finite element simulation tool are used to analyze the high-frequency attenuator and the DM transmission-line EMI filter. The insertion gain, transfer gain, current distribution, and input impedance of the filter under a nominal design are …
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Lightntng protectton of quadruple circuit 275/132kV transmission line
… study conducted on the 275kY and 132 kV transmission line from Kimanis and SPR Power Stations to PMU kolopis and PMU Lok Kawi, Sabah in quadruple circuit shielded transmission line using a software programs, TFlash. The line performance was investigated by using both a single stroke and a …
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Precision electron flow measurements in a disk transmission line
… flow are normally competing requirements, transmission lines with a spatially varying gap in the direction of power flow allow for an inductive profile to be built directly into the geometry of the electrodes. If the transit time of the transmission line is small compared to the pulse width …
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TRANSMISSION LINE RELIABILITY MODELING INCORPORATING EXTREME ADVERSE WEATHER CONSIDERATIONS
… of a reliability model for two redundant transmission lines, which incorporates normal and bad weather conditions. The two indices of system average failure rate and system average outage duration are evaluated for this model using a Markov approach, an approximate equations method and …
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The characterisation and automatic classification of transmission line faults
… electricity supply. Electrical faults on transmission lines are a cause of both interruptions to supply and voltage dips. These are the most common events impacting electricity users and also have the largest financial impact on them. This research focuses on understanding the causes of …
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Switch-on-to-fault scheme for transmission line protection
… maintain dependability and speed when closing a transmission line breaker onto a faulted line. This is accomplished by enabling overreaching directional and nondirectional protection elements for a short window of time shortly after the transmission line breaker closes. When line potential …
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Design of frequency dependent impedance for transmission line modeling.
Thesis: Elec. E., Massachusetts Institute of Technology, Department of Electrical Engineering, 1972
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Design of superconducting transmission line integrated surface-electrode ion-traps
We fabricated superconducting surface electrode ion traps with integrated microwave coplanar waveguides using direct-write optical lithography and a niobium on sapphire process. We then tested these traps in a closed cycle cryostat and used 28 mW of microwave power to excite rotational transitions …
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Transmission line simulation for transient network analyser at Virginia Tech
… purpose cascaded pi section representation of a transmission line for a Transient Network Analyzer was designed. The pi sections modeled single and double circuit lines at 34.5, 69, 138, 345 and 765 KV levels. Representations of mutual impedances produced by nontransposition and mutual impedances …
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The in-service non-destructive evaluation of wooden transmission line poles
… In-service Non-Destructive Evaluation of Wooden Transmission Line Poles. The aim of this work was the development of an effective pole tester that could be used to test the integrity of wooden transmission line poles in situ. The pole testing method that ESKOM uses at present is both time and …
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An inverse transmission line model of the lower limb arterial system
Includes bibliography. Includes disk in pocket at back of book.
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Effects of transmission line compensation and power factor correction on harmonic propagation
… addresses power quality at two different levels, transmission and utilization. Harmonics injected at these levels can severely degrade the performance and long term reliability of the power system; At the utilization level, a typical industrial power system configuration that requires power factor …
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