Radiation, Scattering and Guidance of Electromagnetic Fields by Arbitrarily Shaped Structures Embedded in Layered Media PDF Download
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Author:
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ISBN:
Category :
Languages : en
Pages : 165
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Book Description
An integral equation approach based on the mixed-potential formulation is developed for the analysis of radiation, scattering and guidance of electromagnetic waves by arbitrarily shaped conducting objects in layered uniaxial media. This method is successfully applied to rigorously analyze coax- and waveguide-fed microstrip patch antennas of various shapes, as well as multiconductor transmission lines with conductors of various cross-section profiles, embedded in multilayered media. With the approach developed here, microstrip structures of various, possibly irregular shapes, embedded in multilayered isotropic or uniaxial substrates, may be investigated within one theoretical framework and using the same computer program.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 165
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Book Description
An integral equation approach based on the mixed-potential formulation is developed for the analysis of radiation, scattering and guidance of electromagnetic waves by arbitrarily shaped conducting objects in layered uniaxial media. This method is successfully applied to rigorously analyze coax- and waveguide-fed microstrip patch antennas of various shapes, as well as multiconductor transmission lines with conductors of various cross-section profiles, embedded in multilayered media. With the approach developed here, microstrip structures of various, possibly irregular shapes, embedded in multilayered isotropic or uniaxial substrates, may be investigated within one theoretical framework and using the same computer program.
Author: K. A. Michalski
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ISBN:
Category :
Languages : en
Pages : 1
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The study has been completed for an aperture-coupled microstrip patch antennas with uniaxial substrates. In particular, by a rigorous spectral domain approach-a circular microstrip antenna excited by a fundamental microstrip line mode is analyzed through a rectangular aperture in a ground plane. A more efficient, but approximate, reciprocity theorem based method, has also been implemented. Finally, a mixed, spectral and space domain approach has been developed to analyze an arbitrarily shaped microstrip patch antenna coupled to a microstrip transmission line through an arbitrarily shaped aperture. The space domain method is used to model the arbitrarily shaped patch and aperture, and the semiinfinite transmission line is modeled in spectral domain. To corroborate the validity of the analysis, we have built a circular patch test antenna coupled to the transmission line through a rectangular aperture and measured its input impedance over a broad frequency range.
Author:
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ISBN:
Category : Aeronautics
Languages : en
Pages : 456
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author:
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ISBN:
Category : Research
Languages : en
Pages : 1442
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Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Author:
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ISBN:
Category : Science
Languages : en
Pages : 1088
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Author:
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Category : Dissertations, Academic
Languages : en
Pages : 760
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Author: David Bedford Webb
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ISBN:
Category :
Languages : en
Pages : 220
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The solution of electromagnetic scattering by objects located in planar, multilayered media has long been the subject of active research. For layered-media integral equation solutions via the Method of Moments (MoM), the O($Nsp2$) matrix fill is often prohibitively expensive, even for problems of moderate size. For spatial-domain formulations, this is due to the presence of the Sommerfeld integrals required for obtaining the Green's functions in spatial form. These integrals are completely avoided through use of the complex-image method, which represents the spatial-domain Green's functions in closed form. However, this method is not without limitations, most notably a finite region of validity and an undesirable sensitivity to the choice of requisite parameters. This thesis focuses on methods for overcoming these limitations, to allow robust implementation of the method within the framework of an automated, general-purpose analysis program, applicable to the solution of scattering from arbitrarily shaped objects residing in any number of dielectric layers. Evaluations of several possible improvements to the original complex-image method are presented. A new approach is also presented for representing the angular-dependent Green's function terms that are required when both horizontal and vertical electric currents are present. The complex-image method is applied in this work to the MoM solution of the mixed-potential form of the electric field integral equation (MPIE). Several numerical results are presented for planar and nonplanar objects, including a microstrip patch antenna, wire dipole antennas penetrating dielectric half-spaces, and a microstrip air bridge. These results are compared with measurements or the results from other programs whenever possible. A brief discussion of scattering parameter extraction is also covered, with a comparison of the Prony and Generalized Pencil-of-Functions (GPOF) methods.
Author: Xenia Klinger
Publisher:
ISBN: 9780662191384
Category : City planning
Languages : en
Pages : 79
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Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 974
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Author:
Publisher:
ISBN:
Category : Applied optics
Languages : en
Pages : 700
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