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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

Method of moments analysis of displaced-axis dual reflector antennas

Vered, Nissan. January 1992 (has links)
Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, March 1992. / Thesis Advisor: Jenn, David C. "March 1992." Includes bibliographical references (p. 71). Also available in print.
2

Analysis of non-paraboloidal reflector antennas

Pokuls, Ralph. January 1984 (has links)
No description available.
3

Numerical electromagnetic modeling of a small aperture helical-fed reflector antenna

Cheng, Chin-Yuan. January 1998 (has links)
Thesis (M.S.)--Ohio University, August, 1998. / Title from PDF t.p.
4

Analysis of non-paraboloidal reflector antennas

Pokuls, Ralph. January 1984 (has links)
No description available.
5

Geometrical optics and GTD analysis of subreflectors in Cassegrain and Gregorian reflector antennas /

Lee, Teh-Hong. January 1984 (has links)
Thesis (M.S.)--Ohio State University, 1984. / Includes bibliographical references (leaves 118-119). Available online via OhioLINK's ETD Center
6

A synthesis procedure for array feeds to improve radiation performance of large distorted reflector antennas /

Smith, William Travis, January 1990 (has links)
Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1990. / Vita. Abstract. Includes bibliographical references (leaves 226-230). Also available via the Internet.
7

Beam scanning offset Casegrain reflector antennas by subreflector movement /

LaPean, James William. January 1993 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1993. / Vita. Abstract. Includes bibliographical references. Also available via the Internet.
8

Multiple feed reflector antenna analysis

Stewart, Scot Howard January 1986 (has links)
A method of calculating the secondary pattern of a reflector illuminated by a feed array is developed. Geometrical optics is used to determine the incident field via a coordinate transformation approach. The incident field from each element is superimposed to form the total field used in finding the surface currents of the physical optics radiation integral. The technique allows each element to be arbitrarily excited, positioned and oriented. The element patterns may be different allowing mutual coupling to be included. / M.S.
9

Beam scanning offset Casegrain reflector antennas by subreflector movement

LaPean, James William 30 June 2009 (has links)
In 1987 a NASA panel recommended the creation of the Mission to Planet Earth. This mission was intended to apply to remote sensing experience of the space community to earth remote sensing to enhance the understanding of the climatalogical processes of our planet and to determine if, and to what extent, the hydrological cycle of Earth is being affected by human activity. One of the systems required for the mission was a wide scanning, high gain reflector antenna system for use in radiometric remote sensing from geostationary orbit. This work describes research conducted at Virginia Tech into techniques for beam scanning offset Cassegrain reflector antennas by subreflector translation and rotation. Background material relevant to beam scanning antenna systems and offset Cassegrain reflector antenna system is presented. A test case is developed based on the background material. The test case is beam scanned using two geometrical optics methods of determining the optimum subreflector position for the desired scanned beam direction. Physical optics far-field results are given for the beam scanned systems. The test case system is found to be capable of beam scanning over a range of 35 half-power beamwidths while maintaining a 90% beam efficiency or 50 half-power beamwidths while maintaining less than 1 dB of gain loss during scanning. / Master of Science
10

Analysis of scanning in dual offset reflector antennas and the bifocal system

Rappaport, Carey Milford January 1982 (has links)
Thesis (Elec. E.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science; and, (B.S.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1982. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING / Vita. / Includes bibliographical references. / by Carey Milford Rappaport. / B.S. / Elec.E.

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