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Proceedings of the IEEE

Issue 8 • Date Aug. 1965

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Displaying Results 1 - 25 of 106
  • [Front cover and table of contents]

    Publication Year: 1965, Page(s): c1
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1965, Page(s): 769
    Cited by:  Papers (1)
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    Freely Available from IEEE
  • Poles and zeros: Preface to the radar reflectivity issue

    Publication Year: 1965, Page(s): 770
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  • Frontispiece

    Publication Year: 1965, Page(s):771 - 772
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    Freely Available from IEEE
  • Survey of some early studies of the scattering of plane waves by a sphere

    Publication Year: 1965, Page(s):773 - 785
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1650 KB)

    This survey of the literature prior to World War II shows that the study of the scattering of plane waves by a sphere has a history in which the list of contributors includes some of the greatest names in mathematical physics from the late nineteenth and early twentieth centuries. When viewed in retrospect, this literature appears to be characterized by the appearance of papers by writers who appa... View full abstract»

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  • A look into the future of radar scattering research and development

    Publication Year: 1965, Page(s):786 - 795
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1227 KB)

    In estimating future trends in radar scattering research and development, the authors take the view that the dynamics of progress and change will be governed largely by user demands. Emerging developments in radar for space applications, reflectivity from plasma and other permeable bodies, object resolution and recognition, and synthesis of radar cross-section characteristics will in the main stim... View full abstract»

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  • Digital computer solutions of the rigorous equations for scattering problems

    Publication Year: 1965, Page(s):796 - 804
    Cited by:  Papers (52)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (878 KB)

    A survey of recently developed techniques for solving the rigorous equations that arise in scattering problems is presented. These methods generate a system of linear equations for the unknown current density by enforcing the boundary conditions at discrete points in the scattering body or on its surface. This approach shows promise of leading to a systematic solution for a dielectric or conductin... View full abstract»

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  • Matrix formulation of electromagnetic scattering

    Publication Year: 1965, Page(s):805 - 812
    Cited by:  Papers (125)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (681 KB)

    A new method is proposed for the computation of the radar cross section and other associated field quantities arising when a smooth, perfectly conducting obstacle is illuminated by an incident electromagnetic wave. The scattered wave is first represented by a distribution of electric dipoles over the surface in question, with the response from any dipole proportional to the induced surface current... View full abstract»

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  • Scattering from cylinders with arbitrary surface impedance

    Publication Year: 1965, Page(s):812 - 817
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (502 KB)

    This paper presents an integral equation method for the solution of the field scattered by a set of cylinders with arbitrary cross-sectional shape, and arbitrarily varying anisotropic surface impedance. The integral equations are given for an arbitrary source with arbitrary harmonic variation along the cylinder axis. The scattering problem can be solved for arbitrary three-dimensional sources by e... View full abstract»

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  • Scattering from conducting loops and solution of circular loop antennas by numerical methods

    Publication Year: 1965, Page(s):818 - 822
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (323 KB)

    The integral equation of the current distribution along a circular loop antenna is solved by numerical methods. The integral equation is converted into a set of linear simultaneous equations, whose solution gives the desired current distribution. First, the loop antenna driven by a voltage source is considered and solutions to loops of various sizes are obtained. Secondly, current distributions ar... View full abstract»

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  • A survey of analytical techniques for cross-section estimation

    Publication Year: 1965, Page(s):822 - 833
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1368 KB)

    To serve as a general introduction to the theoretical papers immediately following, the analytical techniques available for estimating the backscattering cross section of a metal target are reviewed. These are classified according to the dimension-to-wavelength ranges for which they are appropriate, and an attempt is made to interpret them in the light of the scattering processes involved. Some ex... View full abstract»

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  • Radar cross-section estimation for simple shapes

    Publication Year: 1965, Page(s):833 - 848
    Cited by:  Papers (33)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1427 KB)

    Radar cross section (RCS) methods for simple shapes are reviewed with special attention being devoted to results rather than to derivations of the formulas involved. In addition, special emphasis is placed on an approach which can be extended to "complex" shapes. Where possible, comparisons between theory and experiment are provided to give a measure of the accuracy obtainable via the use of these... View full abstract»

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  • The Rayleigh region

    Publication Year: 1965, Page(s):848 - 856
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (940 KB)

    A definition of the Rayleigh region is presented in terms of the radius of convergence of the Rayleigh or low-frequency expansion which is both mathematically precise and consistent with current usage in radar scattering work. General methods for obtaining successive terms in low-frequency expansions are outlined and those special shapes for which calculations have actually been carried out are en... View full abstract»

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  • Modal expansions for resonance scattering phenomena

    Publication Year: 1965, Page(s):856 - 864
    Cited by:  Papers (24)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (854 KB)

    This paper very briefly reviews certain approaches commonly used to predict scattering in the region between those amenable to either high or low frequency approximations. As an alternative to extensions of such approximations into this so-called "resonance region," the suggestion is made that the concept of modal expansions of fields be investigated. The existence of such characteristic modes is ... View full abstract»

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  • Asymptotic high-frequency methods

    Publication Year: 1965, Page(s):864 - 876
    Cited by:  Papers (53)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1359 KB)

    A review is given of a wide variety of asymptotic methods used in high-frequency scattering. Following brief descriptions of the saddle point method, Watson transformation, and residue series, a survey of the literature is made in which these methods have been employed. The desirability of using high-frequency approximate methods is pointed out. A critical discussion of geometrical optics, physica... View full abstract»

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  • Application of geometric diffraction theory to scattering from cones and disks

    Publication Year: 1965, Page(s):877 - 882
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    The ability of the geometrical theory of diffraction to predict the radar cross section (RCS) of a perfectly conducting, right circular cone as a function of viewing angle is evaluated by comparison of computed and measured values of RCS. Both vertical and horizontal polarization have been considered for cones ranging from 0.98 to 2.87 wavelengths in diameter at the base and having half angles of ... View full abstract»

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  • Approximations for dielectric or plasma scatterers

    Publication Year: 1965, Page(s):882 - 892
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (966 KB)

    Two approximate methods have been developed for calculating the radar cross sections of nonconducting bodies. The superposition approximation used to obtain the radar cross sections of dielectric clad bodies requires that the scattering properties of the component parts be known. The modified geometrical optics method, which yields the radar cross sections of dielectric bodies, requires no such in... View full abstract»

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  • Transient and impulse response approximations

    Publication Year: 1965, Page(s):893 - 901
    Cited by:  Papers (162)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (833 KB)

    Electromagnetic field waveforms produced by scattering of transient plane waves from finite objects are related to those produced by an impulsive plane wave. Properties of the impulse response waveforms at great distances from the target, particularly in the backscattering direction, are discussed. Various methods for approximation of impulse response waveforms using time and frequency domain conc... View full abstract»

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  • Introduction to radar cross-section measurements

    Publication Year: 1965, Page(s):901 - 920
    Cited by:  Papers (20)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2131 KB)

    This paper is intended to serve both as an introduction to radar cross-section measurements and as an introduction to the several measurement papers that follow in this issue. We discuss the contribution that experimental work makes to theoretical studies. The history of cross-section measurements is reviewed. Some terms are defined, and the major measurement problems are discussed. It is pointed ... View full abstract»

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  • Range requirements in radar cross-section measurements

    Publication Year: 1965, Page(s):920 - 928
    Cited by:  Papers (18)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (878 KB)

    The conditions for radar cross-section measurement are given in terms of permissible variations in the amplitude and phase of the incident field at the target. A number of minimum range conditions are listed and discussed. The minimum range associated with the uniform square aperture antenna is analyzed and its relationship to the sensitivity of measurement is determined. Measurements of small tar... View full abstract»

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  • Target support parameters associated with radar reflectivity measurements

    Publication Year: 1965, Page(s):929 - 936
    Cited by:  Papers (6)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    Theoretical and measured data are presented pertaining to background levels which can be achieved with the conventional target supports: cellular plastic columns and suspension lines. In each case, target weight, measurement frequency, and target cross section are related and presented in the form of support capability curves. Circular Styrofoam [1] columns are used as typical of cellular plastic ... View full abstract»

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  • Measurement of the target scattering matrix

    Publication Year: 1965, Page(s):936 - 946
    Cited by:  Papers (61)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1155 KB)

    The scattering matrix of a target generalizes the scattering properties to include a description of their dependence upon radar polarization. The matrix may be determined directly through two successive transmissions at orthogonal polarizations, with reception of each at both of the polarizations. In the laboratory, it is possible to eliminate the requirement for phase measurement by an indirect t... View full abstract»

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  • The RAT SCAT cross-section facility

    Publication Year: 1965, Page(s):946 - 954
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1352 KB)

    A description of the RAT SCAT cross-section facility is reported along with test results indicating measurement capabilities. The facility is described in terms of location, type of range, type of measurements, and the equipment complement. Measurement capabilities are presented in terms of vehicle dimensions and weight, relative to criteria such as system background, vehicle support background, n... View full abstract»

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  • Dynamic measurement of radar cross sections

    Publication Year: 1965, Page(s):954 - 961
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1630 KB)

    The measurement of the radar cross section of full-size targets in flight presents some unique problems. The techniques employed to maintain the dynamic range of the signal, facilitate data handling, and control the target aspect, all contribute to the efficiency with which the requisite data may be gathered and reduced. The approaches taken in solving these problems are discussed in connection wi... View full abstract»

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  • Some recent developments in RCS measurement techniques

    Publication Year: 1965, Page(s):962 - 972
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1552 KB)

    Three distinct methods of making high-range resolution radar cross-section (RCS) measurements are discussed. Comparisons are drawn for nanosecond pulse, FM/CW, and frequency-stepping methods of measuring location and magnitude of discrete scattering sources. The effects of using wide bandwidth transmissions on RCS amplitude level and fine structure are quantitatively estimated, and analytical resu... View full abstract»

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North Carolina State University