- 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 1 to 9 of 9 (0.007 seconds)| 1 |
Performance of earth station antennas operating in a cluster environmentMigliozzi, Maurizio January 2003 (has links)
No description available.
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Finite difference time domain simulation and measurement of millimetre-wave receiversYeap, Siew Bee January 2003 (has links)
No description available.
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Direction finding methods : a theoretical and practical performance analysis including the effect of polarisation diversityMidfa, Khalid Omar Al January 2003 (has links)
No description available.
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Improved antenna array processing and service enhancements for 3G systems and beyondJahan, Adil Shah January 2006 (has links)
No description available.
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Compact high impedance plane antennasFolayan, Olanike January 2007 (has links)
No description available.
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Space-time DS-CDMA communication systemsHuang, Li-Ke January 2003 (has links)
No description available.
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GPS carrier phase multipath mitigation by spectral analysis for LEO satelliteWong, Ronald T. M. January 2004 (has links)
No description available.
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Modelling and management of the land mobile satellite MIMO radio propagation channelKing, P. R. January 2007 (has links)
No description available.
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Antenna study and design for ultra wideband communication applicationsLiang, Jianxin January 2006 (has links)
Since the release by the Federal Communications Commission (FCC) of a bandwidth of 7.5GHz (from 3.1GHz to 10.6GHz) for ultra wideband (UWB) wireless communications, UWB is rapidly advancing as a high data rate wireless communication technology. As is the case in conventional wireless communication systems, an antenna also plays a very crucial role in UWB systems. However, there are more challenges in designing a UWB antenna than a narrow band one. A suitable UWB antenna should be capable of operating over an ultra wide bandwidth as allocated by the FCC. At the same time, satisfactory radiation properties over the entire frequency range are also necessary. Another primary requirement of the UWB antenna is a good time domain performance, i. e. a good impulse response with minimal distortion. This thesis focuses on UWB antenna design and analysis. Studies have been undertaken covering the areas of UWB fundamentals and antenna theory. Extensive investigations were also carried out on two different types of UWB antennas. The first type of antenna studied in this thesis is circular disc monopole antenna. The vertical disc monopole originates from conventional straight wire monopole by replacing the wire element with a disc plate to enhance the operating bandwidth substantially. Based on the understanding of vertical disc monopole, two more compact versions featuring low-profile and compatibility to printed circuit board are proposed and studied. Both of them are printed circular disc monopoles, one fed by a micro-strip line, while the other fed by a co-planar waveguide (CPW). The second type of UWB antenna is elliptical/circular slot antenna, which can also be fed by either micro-strip line or CPW. The performances and characteristics of UWB disc monopole and elliptical/circular slot antenna are investigated in both frequency domain and time domain. The design parameters for achieving optimal operation of the antennas are also analyzed extensively in order to understand the antenna operations. It has been demonstrated numerically and experimentally that both types of antennas are suitable for UWB applications.
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