• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 49
  • 33
  • 6
  • 6
  • 2
  • 2
  • 1
  • 1
  • Tagged with
  • 106
  • 106
  • 29
  • 28
  • 26
  • 25
  • 20
  • 19
  • 17
  • 16
  • 13
  • 11
  • 11
  • 10
  • 10
  • 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

ANALYSIS AND DESIGN OF CONFORMAL PRINTED ANTENNAS

Hall, Richard C., Wu, Doris I. 11 1900 (has links)
International Telemetering Conference Proceedings / October 30-November 02, 1995 / Riviera Hotel, Las Vegas, Nevada / Conformal printed antennas of arbitrary shape are used for telemetry applications on high velocity vehicles due to their small size and light weight. The design of these antennas is difficult, however, since there are few accurate analytical models that take the effects of curvature into account. This paper discusses a computer aided design (CAD) tool for arbitrarily shaped printed antennas on cylindrical structures based on a rigorous analytical model. The tool is combined with a graphical user interface and can help antenna designers achieve close to optimal performance. An overview of the mathematical model is given here and the CAD tool is used to highlight the effects of curvature on printed antenna performance. Methods of obtaining circular polarization are reviewed.
32

Design and analysis of proximity coupling feeds for multi-layer patch antennas: T-square feed and its two variations. / Design & analysis of proximity coupling feeds for multi-layer patch antennas

January 2005 (has links)
Lee Wai Ki. / Thesis submitted in: May 2004. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2005. / Includes bibliographical references (leaves 62-66). / Abstracts in English and Chinese. / Chapter Chapter 1: --- Introduction --- p.8 / Chapter 1.1 --- Motivation --- p.8 / Chapter 1.2 --- Organization of the thesis --- p.10 / Chapter Chapter 2: --- Background Technology --- p.12 / Chapter 2.1 --- Introduction: FUZZY EM CAD formula for impedance of the edge of the patch antenna --- p.12 / Chapter 2.2 --- Fringe field extension of the patch: --- p.12 / Chapter 2.2.1 --- Applying the root of area capacitance formula --- p.12 / Chapter 2.2.2 --- Defining microstrip parallel plate capacitor with infinite substrate --- p.13 / Chapter 2.2.3 --- The parallel plate capacitor formula --- p.14 / Chapter 2.2.4 --- DC fringe field leading to the patch extension --- p.15 / Chapter 2.3 --- Cavity model of the patch --- p.16 / Chapter 2.3.1 --- Cavity model analysis on its internal field --- p.16 / Chapter 2.3.2 --- Input impedance derived from cavity model --- p.19 / Chapter 2.3.3 --- Quality factor of patch antenna --- p.19 / Chapter 2.4 --- Fringe extension applied to cavity model in RF --- p.23 / Chapter Chapter 3: --- Simple one Port wide band multi-layer patch Antenna --- p.24 / Chapter 3.1 --- Introduction --- p.24 / Chapter 3.2 --- Antenna design --- p.25 / Chapter 3.3 --- Measured results --- p.26 / Chapter 3.4 --- Antenna Analysis --- p.29 / Chapter 3.5 --- Conclusion --- p.30 / Chapter Chapter 4: --- Design synthesis of patch antennas of the T-square Probe --- p.31 / Chapter 4.1 --- Introduction --- p.31 / Chapter 4.2 --- The physics interpretation --- p.32 / Chapter 4.3 --- The Smith chart movement by the T-square feed on the patch --- p.33 / Chapter 4.4 --- Conclusion --- p.35 / Chapter Chapter 5: --- Design synthesis of the wideband tuning-fork-shaped feeding for patch antenna --- p.36 / Chapter 5.1 --- Introduction --- p.36 / Chapter 5.2 --- Antenna design --- p.36 / Chapter 5.3 --- The Smith chart movements of the tuning-fork shaped feeding on the patch --- p.37 / Chapter 5.4 --- Conclusion --- p.41 / Chapter Chapter 6: --- "Fork on H-slot feed of multilayer microstrip antenna for wideband, high isolation and low cross polarization" --- p.42 / Chapter 6.1 --- Introduction --- p.42 / Chapter 6.2 --- Antenna analysis - Isolation improvement considerations --- p.44 / Chapter 6.3 --- Antenna design and measured results --- p.46 / Chapter 6.3.1 --- The simulated return loss and current distribution s in various structure of the two port. --- p.47 / Chapter 6.3.2. --- The hardware and the comparison of results --- p.50 / Chapter 6.3.3. --- The simulated properties of the radiation patterns and cross-polarizations --- p.52 / Chapter 6.3.4. --- The comparison of radiation patterns between simulation and hardware --- p.56 / Chapter 6.4 --- Further improvements --- p.58 / Chapter 6.5 --- Conclusion --- p.59 / Chapter Chapter 7: --- Conclusions --- p.60 / Reference --- p.62 / List of Publication --- p.66
33

Design of a compact microstrip patch antenna for use in wireless/cellular devices

Nakar, Punit S. Gross, Frank B. January 2004 (has links)
Thesis (M.S.)--Florida State University, 2004. / Advisor: Dr. Frank Gross, Florida State University, College of Engineering, Dept. of Electrical and Computer Engineering. Title and description from dissertation home page (viewed 6/15/04). Includes bibliographical references.
34

Application of genetic algorithms to the design of microstrip antennas, wire antennas and microwave absorbers

Choo, Hosung 24 June 2011 (has links)
Not available / text
35

Microstrip antennae with various substrate thickness / by Mehmet Kara.

Kara, Mehmet January 1996 (has links)
Includes bibliographies. / xix, [252] leaves : ill. ; 30 cm. / Title page, contents and abstract only. The complete thesis in print form is available from the University Library. / This research addresses probe fed classical rectangular microstrip antenna elements and arrays, that are fabricated on substrate materials with various thicknesses and relative permittivities. Formulae are developed for calculating the patch dimensions, the resonant input resistance, the resonant frequency, the bandwidth and the radiation patterns of elements, as well as the mutual coupling coefficients of arrays. / Thesis (Ph.D.)--University of Adelaide, Dept. of Electrical and Electronic Engineering, 1996
36

MEMS based tunable microstrip patch antenna fabricated using printed circuit processing techniques

Jackson, Ronald Edward, Ramadoss, Ramesh. January 2006 (has links) (PDF)
Thesis(M.S.)--Auburn University, 2006. / Abstract. Vita. Includes bibliographic references (p.40-41).
37

Design of compact and dual-band microwave microstrip balun /

Tan, Song. January 2008 (has links)
Thesis (M.Phil.)--Hong Kong University of Science and Technology, 2008. / Includes bibliographical references (leaves 69-77). Also available in electronic version.
38

Development and modelling of new wideband microstrip patch antennas with capacitive feed probes

Mayhew-Ridgers, Gordon. January 2004 (has links)
Thesis (Ph. D.)(Electronic Engineering)--University of Pretoria, 2004. / Summaries in English and Afrikaans. Includes bibliographical references.
39

MoM modeling of metal-dielectric structures using volume integral equations

Kulkarni, Shashank Dilip. January 2004 (has links)
Thesis (M.S.)--Worcester Polytechnic Institute. / Keywords: volume integral equations; patch antenna; reonators; MoM. Includes bibliographical references (p. 103-106).
40

Design and analysis of a wideband patch antenna for use with a miniature radar system

Kornbau, Nathan Thomas. January 2008 (has links)
Thesis (M.S.)--Michigan State University. Dept. of Electrical Engineering, 2008. / Title from PDF t.p. (viewed on Aug. 5, 2009) Includes bibliographical references (p. 76-77). Also issued in print.

Page generated in 0.0544 seconds