Control of Electromagnetic Scattering by Antenna Impedance Loading
Control of Electromagnetic Scattering by Antenna Impedance Loading

Author: Shi-chuan Lee

Publisher:

Published: 1974

Total Pages: 88

ISBN-13:

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The application of impedance loading techniques for the reduction of backscatter from radar targets were studied. The hybrid methods which combine the GTD and the moment method were used to analyze the backscattering from various geometries such as impedance loaded infinite wedge and a two-dimensional wing model. The effect of both the trailing and the leading edge was considered by using a two-dimensional wing model. The edge diffraction source can be considerably reduced over a 3:1 frequency band for the two-dimensional case. The square plate with a loaded slot was analyzed by a wire grid model. The backscatter reduction of the square plate can be achieved at least over a 2:1 frequency band.

Active Radar Cross Section Reduction
Active Radar Cross Section Reduction

Author: Hema Singh

Publisher: Cambridge University Press

Published: 2015-03-02

Total Pages: 354

ISBN-13: 1107092612

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This book discusses the active and passive radar cross section (RCS) estimation and techniques to examine the low observable aerospace platforms. It begins with the fundamentals of RCS, followed by the dielectric, magnetic and metamaterials parameters of the constituent materials and then explains various methods and the emerging trends followed in this area of study. The RCS estimation of phased array including the mutual coupling effect is also presented in detail in the book. The active RCS reduction is carefully touched upon through the performance of phased arrays, sidelobe cancellers and mitigation of multipath effect. Providing information on various adaptive algorithms like least mean square (LMS), recursive least square (RLS) and weighted least square algorithms, the authors also mention the recent developments in the area of embedded antennas, conformal load bearing antenna, metamaterials and frequency selective surface (FSS) based RCS reduction.

Control of Electromagnetic Scattering from Wing Profiles by Impedance Loading
Control of Electromagnetic Scattering from Wing Profiles by Impedance Loading

Author: J. A. Aas

Publisher:

Published: 1975

Total Pages: 108

ISBN-13:

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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).

Radio Wave Propagation
Radio Wave Propagation

Author: United States. Office of Scientific Research and Development. National Defense Research Committee

Publisher:

Published: 1949

Total Pages: 572

ISBN-13:

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Radiowellen, Frequenzverteilung, Funkwellen.

Radio Wave Propagation
Radio Wave Propagation

Author: Chas. R. Burrows

Publisher: Academic Press

Published: 2013-10-22

Total Pages: 561

ISBN-13: 1483258548

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Radio Wave Propagation: Consolidated Summary Technical Report of the Committee on Propagation of the National Defense Research Committee presents all the scientific information and report of experiments. This book discusses the problems encountered in the propagation of radio waves. Organized into three volumes, this book begins with an overview of the technical developments in the study of tropospheric propagation. This text then outlines the general theory of standard and nonstandard propagation together with descriptions and results of transmission experiments designed to test the theory. Other chapters consider the more unusual problems concerning the radar behavior of targets. This book discusses as well the problems of radio wave propagation in the standard atmosphere at frequencies above 30 megacycles. The final chapter deals with the selection and utilization of local terrain features that affect propagation and the performance of equipment. This book is a valuable resource for scientists and engineers in the field of radio wave propagation.