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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.
31

A phased array sonar for an underwater acoustic communications system

Hanot, William Howard January 1980 (has links)
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1980. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING. / Includes bibliographical references. / by William Howard Hanot. / M.S.
32

Genetic algorithm design and testing of a random element 3-D 2.4 GHZ phased array transmit antenna constructed of commercial RF microchips /

Esswein, Lance C. January 2003 (has links) (PDF)
Thesis (M.S. in Physics)--Naval Postgraduate School, June 2003. / Thesis advisor(s): Michael Melich, David Jenn, Rodney Johnson. Includes bibliographical references (p. 113-115). Also available online.
33

Photonic crystal waveguides based active and passive devices for phased array antenna systems

Jiang, Yongqiang 28 August 2008 (has links)
Not available / text
34

Waveguide-hologram-based true-time delay modules for K-band phased-array antenna system demonstration

Chen, Yihong 10 May 2011 (has links)
Not available / text
35

High speed SiGe MMICS for phased array communications

Sun, Pinping. January 2008 (has links) (PDF)
Thesis (Ph. D.)--Washington State University, August 2008. / Includes bibliographical references (p. 66-68).
36

Novel membrane-backed defected ground plane transmission line phase shifter /

Shafai, Leili, January 1900 (has links)
Thesis (Ph.D.) - Carleton University, 2006. / Includes bibliographical references (p. 203-216). Also available in electronic format on the Internet.
37

Digital phased array architectures for radar and communications based on off-the-shelf wireless technologies /

Ong, Chin Siang. January 2004 (has links) (PDF)
Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, December 2004. / Thesis advisor(s): David C. Jenn, Siew Yam Yeo. Includes bibliographical references (p. 63-64). Also available online.
38

MSM photodiode as the switching element in a photoswitch-based class E microwave power amplifier

Smith, Brady Christopher. January 2008 (has links)
Thesis (M.S.)--University of Missouri-Columbia, 2008. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on August 14, 2009) Includes bibliographical references.
39

Photonic crystal waveguides based active and passive devices for phased array antenna systems

Jiang, Yongqiang, January 1900 (has links) (PDF)
Thesis (Ph. D.)--University of Texas at Austin, 2006. / Vita. Includes bibliographical references.
40

Infrared Phased-array Antenna-coupled Tunnel Diodes

Slovick, Brian Alan 01 January 2011 (has links)
Infrared (IR) dipole antenna-coupled metal-oxide-metal (MOM) tunnel diodes provide a unique detection mechanism that allows for determination of the polarization and wavelength of an optical field. By integrating the MOM diode into a phased-array antenna, the angle of arrival and degree of coherence of received IR radiation can be determined. The angular response characteristics of IR dipole antennas are determined by boundary conditions imposed by the surrounding dielectric or conductive environment on the radiated fields. To explore the influence of the substrate configuration, single dipole antennas are fabricated on both planar and hemispherical lens substrates. Measurements demonstrate that the angular response can be tailored by the thickness of the electrical isolation stand-off layer on which the detector is fabricated and/or the inclusion of a ground plane. Directional detection of IR radiation is achieved with a pair of dipole antennas coupled to a MOM diode through a coplanar strip transmission line. The direction of maximum angular response is altered by varying the position of the diode along the transmission line connecting the antenna elements. By fabricating the devices on a quarter wave layer above a ground plane, narrow beam widths of 35° full width at half maximum and reception angles of ± 50° are achievable with minimal side-lobe contributions. Phased-array antennas can also be used to assess the degree of coherence of a partially coherent field. For a two-element array, the degree of coherence is a measure of the correlation of electric fields received by the antennas as a function of the element separation.

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