- About
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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.
Search results
Showing 261 to 270 of 2518 (0.029 seconds)| 261 |
Observations of anisotropies in the CMBR at 15 GHz with the CATO'Sullivan, Creidhe Margaret Mary January 1995 (has links)
No description available.
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A 2.5-D large-signal gain coupled-cavity travelling-wave tube modelBrowne, Jefferson Andrew January 1997 (has links)
No description available.
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Ferrites grown in a glassy or ceramic matrixBorgeaud, Timothy Lee January 2000 (has links)
No description available.
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| 264 |
Swept frequency absorption in particulate magnetic materialsLawson, Graham Richard January 1995 (has links)
No description available.
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| 265 |
Impregnated cathodes for use in high power microwave tubesRaju, R. S. January 1987 (has links)
No description available.
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| 266 |
Investigations into the effects of petroleum hydrocarbons on the immunocompetence of Ostrea edulis and the potential application for biological monitoring : (with preliminary investigations on the immunology of Crassostrea biological rhizophorae)Williams, Margaret A. J. Jones January 1997 (has links)
No description available.
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Concurrent mixed mode modelling of active strip antennasMcDowall, David Stewart January 1993 (has links)
No description available.
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Snow monitoring in the UK using a microwave emission modelButt, Mohsin Jamil January 2001 (has links)
No description available.
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Measurements and analysis of the microwave dielectric properties of human and animal tissuesGorton, Andrew James January 1996 (has links)
No description available.
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The microwave response of ultra thin microcavity arraysBrown, James R. January 2010 (has links)
The ability to understand and control the propagation of electromagnetic radiation underpins a vast array of modern technologies, including: communication, navigation and information technology. Therefore, there has been much work to understand the interaction between electromagnetic waves and metal surfaces, and in particular to design materials the characteristics of which can be tailored to produce a desired response to microwave radiation. It is the objective of this thesis to demonstrate that patterning metal surfaces with sub-wavelength apertures can afford hitherto unrealised control over the reflection and transmission characteristics of materials which are an order of magnitude thinner than those employed historically. The work presented herein aims to establish ultra thin cavity structures as novel materials for the selective absorption and transmission of microwave radiation. Experimental and theoretical approaches are used to elucidate the mechanism that allows such structures to produce highly efficient absorption via the excitation of standing wave modes in structures that are two orders of magnitude thinner than the operating wavelength. Also considered is how this same mechanism mediates transmission of selected frequencies through similarly thin structures. Later chapters focus on ultra thin cavity structures which, through higher-order rotational symmetry, exhibit resonant absorption which is almost completely independent of incident and azimuthal angle and polarisation state. A detailed studied of the absorption bandwidth of these devices is also presented in the context of fundamental theoretical limitations arising from the thickness and magnetic permeability of the structure.
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