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  • About
  • 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.
1

Reduction of mutual coupling in small dipole array antenna

Hock, Chua Eng 03 1900 (has links)
The mutual coupling in phased array is a well-known phenomenon. It affects the active element pattern of the array as the phase of the individual element is altered. In an array that has many elements, the effect is identical for all the elements that are nearer to the center of the antenna, thus allowing a more predictable scan performance with respect to the phase of the elements. However, in a small array that has only three elements, the active element pattern for the elements at the end can be significantly different from the center element and this affects the predictability of operations such as direction finding. The thesis investigates two ways that can potentially reduce or at least control the mutual coupling in small arrays. The first method simply adds a dummy element with a special load condition to each end of the array to make the edge element "feel" as if there are more elements next to it. The second method uses a passive feedback circuit to both monitor and correct the magnitude and phase of the mutual coupling at the input of each array element. A hybrid ring is attached to each of the elements to monitor the amount of interference received by that element. Simulation results for the dummy element method shows that some reduction in phase error can be achieved if the spacing and length of the element are selected properly. The compensation network approach relies on an efficient two-port array element. The research has focused on the design of a two-port printed circuit dipole that could be used in such an array. The dipole was designed, simulated, and fabricated. Future research will use this element in a compensation network. / Republic of Singapore Navy author.
2

On the design of large bandwidth arrays of slot elements with wide scan angle capabilities /

McCann, John Forrest, January 2006 (has links)
Thesis (M.S.)--Ohio State University, 2006. / Includes bibliographical references (leaves 98-90). Available online via OhioLINK's ETD Center
3

Genetic algorithms as a tool for phased array radar design /

Bartee, Jon A. January 2002 (has links) (PDF)
Thesis (M.S.)--Naval Postgraduate School, 2002. / Thesis advisor(s): Michael Melich, David Jenn, Rodney Johnson. Includes bibliographical references (p. 71-72). Also available online.
4

Distributed subarray antennas for multifunction phased-array radar /

Lin, Chih-heng. January 2003 (has links) (PDF)
Thesis (M.S. in Systems Engineering)--Naval Postgraduate School, September 2003. / Thesis advisor(s): David C. Jenn, Richard W. Adler. Includes bibliographical references (p. 71-72). Also available online.
5

Reduction of mutual coupling in small dipole array antenna /

Chua, Eng Hock. January 2003 (has links) (PDF)
Thesis (M.S. in Systems Engineering)--Naval Postgraduate School, March 2003. / Thesis advisor(s): David Jenn, Richard Adler. Includes bibliographical references (p. 123). Also available online.
6

Adaptive update rate target tracking for a phased array radar /

Sarunic, Peter. Unknown Date (has links)
Thesis (ME)--University of South Australia, 1995
7

Substrate supported metal strip antennas for monolithically fabricated millimetre wavelength arrays /

Parfitt, Andrew J. January 1992 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, Dept. of Electrical and Electronic Engineering, 1993? / Includes bibliographical references (leaves 219-227).
8

Electrically small planar antenna for circular polarization /

Huysamen, Johan Herman. January 2007 (has links)
Thesis (MScIng)--University of Stellenbosch, 2007. / Bibliography. Also available via the Internet.
9

MATLAB-Based Dipole Array Simulator Tool For MIT Haystack Observatory

Bertulli, Scott. January 2005 (has links)
Thesis (M.S.) -- Worcester Polytechnic Institute. / Keywords: antenna; dipole; phased array; active loading. Includes bibliographical references (p. 100-102).
10

Immittance properties of large finite dielectric covered phased arrays /

Shubert, Keith Alan January 1980 (has links)
No description available.

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