Control Of Electromagnetic Scattering From Wing Profiles By Impedance Loading

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Control Of Electromagnetic Scattering From Wing Profiles By Impedance Loading

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Author : J. A. Aas
language : en
Publisher:
Release Date : 1975

Control Of Electromagnetic Scattering From Wing Profiles By Impedance Loading written by J. A. Aas and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Electromagnetic waves categories.

A computational technique has been developed to calculate the electromagnetic scattering from two-dimensional wing profiles loaded by impedance strips. These strips are represented by impedance boundary conditions. This report deals with the parallel electric polarization (TM polarization) while a similar study of the perpendicular polarization is contained in Reference (1). The effect of the impedance loading is studied for different shapes and sizes of the wing, and for different angles of incidence. The last part of the report deals with the relation between two- and three-dimensional scattering. Three-dimensional problems may in certain cases be solved at least approximately from the knowledge of the scattered field in two-dimensional problems. (Author).

Continuation Of The Investigation Of Multi Frequency Radar Reflectivity And Radar Target Identification

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Author : D. L. Moffatt
language : en
Publisher:
Release Date : 1975

Continuation Of The Investigation Of Multi Frequency Radar Reflectivity And Radar Target Identification written by D. L. Moffatt and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with Airplanes categories.

This report summarizes research during the period July 1, 1974 to June 30, 1975 under the contract on two technical objectives of the Air Force: improved detection and discrimination of radar targets and reduction of nonspecular scattering by wing geometries. The report is contained in two main sections. The first section outlines methods for deducing the complex natural resonances of arbitrary radar targets and the use of these resonances via predictor-correlator processing for detection and discrimination. Illustrative examples of both natural resonance extraction and discrimination are given for aircraft targets. The second section of the report summarizes the analysis of a loaded two-dimensional wind model for horizontal polarization. Hybrid techniques combining moment methods and the geometrical theory of diffraction are used and the loading consists of surface impedance patches. Examples of reduction of the nonspecular cross section are given. A 'folded dipole' like antenna is used as an alternate mechanism for controlling edge diffracted fields.

Scientific And Technical Aerospace Reports

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Author :
language : en
Publisher:
Release Date : 1990

Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Aeronautics categories.

Inverse Methods In Electromagnetic Imaging

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Author : Wolfgang M. Boerner
language : en
Publisher:
Release Date : 1985

Inverse Methods In Electromagnetic Imaging written by Wolfgang M. Boerner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Electromagnetic waves categories.

Theoretical Methods For Determining The Interaction Of Electromagnetic Waves With Structures

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Author : J.K. Skwirzynski
language : en
Publisher: Springer
Release Date : 1981-10-31

Theoretical Methods For Determining The Interaction Of Electromagnetic Waves With Structures written by J.K. Skwirzynski and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981-10-31 with Science categories.

This volume contains almost complete proceedings of the NATO Advanced Study Institute (ASI) organised in 1979 to bring together principal innovators and numerous users of mathematical techniques for analysing the interaction of electromagnetic waves with engineering and biological structures. The mathematical disciplines which can be brought to bear on these problems necessitate examination of effectiveness, convergence and robustness of the derived analytic and num~rical algorithms. The aim of this ASI was to give a clear and up-to-date tutorial presentation of available techniques, and to bring together interested scientists, engineers and mathematiciaris, to discuss together their experience and to ensure wider familiarity with the subject. Our programme consists of three distinct yet related parts. The first two of these reflect two somewhat different methods applicable for different ranges of L/A, where L represents a characteristic dimension of a structure and A is a representative wavelength-of radiation. The third part deals with the specific problem of biological interaction. In the first part (Low and Intermediate Frequency Applications) we offer tutorial texts and user-oriented discussions on main techniques and problems concerning: radiation, scattering, aperture penetration, inverse scattering, using moment methods and their developments. The approach to the high frequency applications forms the subject of the second part of this volume, concentrating mainly on the geometrical theory of diffraction (GTD). There are three main variants of the GTD: uniform theory of diffraction (UTD), uniform asymptotic theory (liAT) , spectral theory of diffraction (STD).

R D Abstracts

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Author : Technology Reports Centre (Great Britain)
language : en
Publisher:
Release Date : 1976

R D Abstracts written by Technology Reports Centre (Great Britain) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with categories.

Government Reports Announcements Index

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Author :
language : en
Publisher:
Release Date : 1976-03

Government Reports Announcements Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976-03 with Science categories.

Government Reports Annual Index

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Author :
language : en
Publisher:
Release Date : 199?

Government Reports Annual Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 199? with categories.

Government Reports Annual Index Keyword A L

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Author :
language : en
Publisher:
Release Date : 1976

Government Reports Annual Index Keyword A L written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Government reports announcements & index categories.

Government Wide Index To Federal Research Development Reports

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Author :
language : en
Publisher:
Release Date : 1966-02

Government Wide Index To Federal Research Development Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966-02 with Government publications categories.