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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 61 to 70 of 2451 (0.132 seconds)| 61 |
An integral equation method for the evaluation of the frequency-dependent per unit length inductance and resistance matrices for a uniform multiconductor lossy transmission line systemVakanas, Loizos Petrou, 1964- January 1989 (has links)
The problem of electromagnetic field penetration in the finite-resistivity conductors of a uniform, multiple, coupled transmission line system (MTL) is considered. Under the assumption of quasi-transverse electric and magnetic (quasi-TEM) mode of propagation, the problem of determining the per-unit-length resistance and inductance matrices for such MTL systems reduces to solving a quasi-magnetostatic problem. An integral equation for the current density distribution inside the conductors is formulated and solved numerically using the method of moments. From straightforward energy considerations and the current density distribution, the per-unit-length resistance and inductance matrices are calculated. Several microstrip configurations are then analysed and the effects of the geometrical characteristics of the structures on the per-unit-length inductance and resistance matrices, as well as their frequency dependence are investigated.
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A system to measure the phase shift and attenuation of underground HF electromagnetic propagationSchulte, Joseph Thomas 1957- January 1989 (has links)
This thesis discusses the theory and limitations of a system that has been designed and constructed for the purpose of measuring the phase shift and attenuation of high-frequency (15 MHZ) electromagnetic waves propagating between two insulated antennas that have been lowered down air-filled boreholes (cased with PVC pipe) at San Xavier Mine, Pima County, Arizona. Both the transmitting and receiving antennas are center-fed, sleeve dipoles that have been tuned to approximately their resonant lengths. The insulated-sleeve dipole antenna is modelled as the inner conductor of a radiating, coaxial transmission-line, which allows simple transmission-line formulas to be used in approximating the antenna impedance and current distribution along the antenna. Experimental results at the San Xavier Mine indicate the analogy is valid. Consequently, the most easily interpreted and repeatable measurements have been made with the antennas centered in the borehole.
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Investigation of the wave impedance radiated by a loaded loopUpton, Miles Edwin Grimshaw January 1990 (has links)
No description available.
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Magnetohydrodynamics of swirling, recirculating flowDavidson, P. A. January 1986 (has links)
No description available.
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EMFs and gene activationLacy-Hulbert, Adam January 1995 (has links)
No description available.
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Scattered field decomposition for cylindrical scatterersBishop, P. K. January 1997 (has links)
No description available.
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An investigation of the EMC properties of modern microcontrollersSim, John Daniel January 1999 (has links)
No description available.
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IDENTIFICATION OF THE COMPLEX RESONANCES OF A DIELECTRIC SLAB AND A CIRCULAR CYLINDER.Simon, Jay Irwin. January 1984 (has links)
No description available.
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Near field effects of terahertz pulsesCarey, John Joseph January 2003 (has links)
No description available.
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New techniques for the measurement of radiated emissions in a screened room for frequencies up to 200MHzDawson, Linda January 1989 (has links)
No description available.
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