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IRE Transactions on Antennas and Propagation

Issue 3 • July 1956

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  • [Front cover and table of contents]

    Publication Year: 1956, Page(s): 0
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    Freely Available from IEEE
  • Introduction

    Publication Year: 1956, Page(s): 190
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  • Welcoming address

    Publication Year: 1956, Page(s): 191
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  • On field representations in terms of leaky modes or Eigenmodes

    Publication Year: 1956, Page(s):192 - 194
    Cited by:  Papers (39)
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    Solutions to source-excited field problems are frequently represented as superpositions of source-free field solutions. The latter are in general of two types: eigenmodes and noneigenmodes which are related to the zeros of the total impedance or alternatively the poles of the scattering coefficient of a system. The eigenmodes are everywhere finite and comprise a complete orthogonal set. The noneig... View full abstract»

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  • The interpretation of numerical results obtained by rigorous diffraction theory for cylinders and spheres

    Publication Year: 1956, Page(s):195 - 202
    Cited by:  Papers (3)
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    The classical solutions of the scattering problems for homogeneous spheres and circular cylinders are taken as the starting point for a physical discussion. The limiting cases arising if two or three of the parameters x, m, and x(m-1) are very small or very large are surveyed and interpreted. The remaining paper deals ... View full abstract»

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  • Creeping waves for objects of finite conductivity

    Publication Year: 1956, Page(s):203 - 208
    Cited by:  Papers (24)
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    It is shown that it is not necessary to apply the van der Pol-Bremmer expansion in order to obtain the Watson residue series without remainder integral. There appear two kinds of residual waves. Those of the first kind do not enter the object and correspond to the usual creeping waves for objects of infinite conductivity. They arise from poles in the vicinity of the zeros of View full abstract»

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  • A method for the asymptotic solution of diffraction problems

    Publication Year: 1956, Page(s):209 - 215
    Cited by:  Papers (2)
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    The equation for the propagation of harmonic waves in a homogeneous medium is considered as the transform of an hyperbolic equation in one more variable. The boundary value problem of diffraction theory cans by this Laplace transform, be related to Cauchy's problem. The transformed problems are solved for 2 + 1 variables by methods introduced by Evvard and Ward in supersonic airfoil theory. As an ... View full abstract»

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  • The modeling of physical systems

    Publication Year: 1956, Page(s):216 - 218
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  • On the diffraction field near a plane-screen corner

    Publication Year: 1956, Page(s):219 - 223
    Cited by:  Papers (8)
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    It is shown that the diffraction field of an incident plane scalar wave in the vicinity of a plane-screen corner of arbitrary angle can be found approximately by solving Laplace's equation. An approximate solution, which satisfies the boundary conditions exactly, is presented as a simple closed expression by generalizing the known solution of the half-plane problem. A special corner condition, in ... View full abstract»

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  • Electromagnetic radiation patterns and sources

    Publication Year: 1956, Page(s):224 - 232
    Cited by:  Papers (10)
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  • A refinement of the WKB method and its application to the electromagnetic wave theory

    Publication Year: 1956, Page(s):233 - 239
    Cited by:  Papers (2)
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    When dealing with the problem of diffraction of waves, certain special functions appear which are defined by ordinary differential equations of the second order; for example, Bessel functions, Legendre functions, and Mathieu functions appear for the case of a circular cylinder, a sphere, and an elliptic cylinder, respectively. Exact solutions are obtained in the form of infinite series of such fun... View full abstract»

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  • Approximate method for scattering problems

    Publication Year: 1956, Page(s):240 - 242
    Cited by:  Papers (1)
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  • Electromagnetic research at the Institute of Mathematical Sciences of New York University

    Publication Year: 1956, Page(s):243 - 263
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    This paper presents current electromagnetic research efforts and research completed during the past few years at New York University. In the research itself emphasis has been placed on basic problems involving appreciable mathematical complexity and mathematical methodology. However, this account describes the results from the standpoint of their contribution to microwave problems, ionospheric and... View full abstract»

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  • Asymptotic developments and scattering theory in terms of a vector combining the electric and magnetic fields

    Publication Year: 1956, Page(s):264 - 265
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    The vector combination \vec{M}=({\mu \over \epsilon})^{1/4} \vec{H} + j ({\epsilon \over \mu})^{1/4} \vec{E} which was in principle introduced by Bateman and Silberstein in order to shorten Maxwell's equations for homogeneous media, also proves to be useful for the treatment of inhomogeneous media \epsilon and View full abstract»

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  • The theoretical and numerical determination of the radar cross section of a prolate spheroid

    Publication Year: 1956, Page(s):266 - 275
    Cited by:  Papers (32)
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    The exact curve is found for the nose-on radar cross section of a perfectly conducting prolate spheroid whose ratio of major to minor axis is 10:1, for values of \pi times the major axis divided by the wavelength less than three. The exact acoustical cross section is also found. The mathematical solution is obtained by setting up a series expansion for the scat... View full abstract»

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  • Solution of problems in electromagnetic wave theory on a high speed digital calculating machine

    Publication Year: 1956, Page(s):276 - 280
    Cited by:  Papers (3)
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    This paper contains references to several problems in electromagnetic wave theory which have been solved by numerical methods. In particular, it treats the methods and machines employed by groups at the University of Michigan, Willow Run Research Center, and at the U. S. Naval Proving Ground, Dahlgren, Virginia, in obtaining on a high-speed computing machine a numerical solution for the radar cros... View full abstract»

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  • Edge currents in diffraction theory

    Publication Year: 1956, Page(s):282 - 287
    Cited by:  Papers (22)
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    A comparatively simple method for obtaining an asymptotic approximation to the electromagnetic field diffracted by a large aperture in a perfectly conducting, infinitely thin, plane screen is suggested. The method is based on two assumptions: first, that in some regions the scattered field is nearly the same as the field that would be generated by certain currents located on the edge of the apertu... View full abstract»

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  • On discontinuous electromagnetic waves and the occurrence of a surface wave

    Publication Year: 1956, Page(s):288 - 293
    Cited by:  Papers (27)
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    Two problems are considered: (1) The field around a dipole free in space. Contrary to the usual treatment, where the moment of the dipole is considered to vary harmonically in time, here the moment is assumed initially to be zero but at the instant t = 0 to jump to a constant value, which it further maintains. (2) The same dipole is placed vertically on a hor... View full abstract»

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  • The excitation of a perfectly conducting half-plane by a dipole field

    Publication Year: 1956, Page(s):294 - 296
    Cited by:  Papers (4)
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    Starting with the solution of two scalar problems in diffraction theory derived by MacDonald in 1915, it is shown that the following problem may be solved. An electric or magnetic dipole is situated in the presence of a semi-infinite, perfectly conducting, thin plane. This problem may be solved by appealing to an appropriate representation of the electromagnetic field. When the formulation is comp... View full abstract»

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  • A critique of the variational method in scattering problems

    Publication Year: 1956, Page(s):297 - 301
    Cited by:  Papers (37)
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    It is shown that the variational method of dealing with the integral equations of scattering problems is equivalent to solving the integral equation directly by Galerkin's method and using the standard formula for the amplitude of the scattered wave. The second method also satisfies the reciprocity theorem. It is therefore suggested that the reciprocity theorem be used as the basis of approximatio... View full abstract»

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  • The mathematician grapples with linear problems associated with the radiation condition

    Publication Year: 1956, Page(s):302 - 311
    Cited by:  Papers (1)
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  • Diffraction of a convex cylinder

    Publication Year: 1956, Page(s):312 - 321
    Cited by:  Papers (92)
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    The leading term in the asymptotic expansion for large k = 2 \pi/\lambda , of the fields reflected and diffracted by any convex cylinder are constructed. The cross section of the cylinder is assumed to be a smooth curve which may be either closed or open and extending to infinity. The method employed is an extension of geometrical optics in two respects. Fir... View full abstract»

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  • Near-field corrections to line-of-sight propagation

    Publication Year: 1956, Page(s):322 - 329
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    This study considers the line-of-sight propagation of electromagnetic waves in a turbulent medium. Interest here centers on the received signal's phase stability. The field equation describing propagation through a region characterized by random dielectric fluctuations is first developed. Solutions of this equation which represent the scattered field are derived with ordinary perturbation theory. ... View full abstract»

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  • On the scatttering of waves by an infinite grating

    Publication Year: 1956, Page(s):330 - 345
    Cited by:  Papers (65)
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    Using Green's function methods, we express the field of a grating of cylinders excited by a plane wave as certain sets of plane waves: a transmitted set, a reflected set, and essentially the sum of the two "inside" the grating. The transmitted set is given by psi_{o} + 2\Sigma C_{\upsilon }G(\theta_{\upsilon }, \theta_{o})psi_{\upsilon } , where the View full abstract»

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  • Measurement and analysis of instantaneous radio height-gain curves at 8.6 millimeters over rough surfaces

    Publication Year: 1956, Page(s):346 - 351
    Cited by:  Papers (4)
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    By the use of an array of ten vertically-spaced antennas and a rotating wave guide switch, a portion of the height-gain pattern for a short radio path was obtained as a function of time for a wave length of 8.6 millimeters. In the analysis of the data taken across a small lake, the reflection from the water is assumed to be made up of two components. One component is a constant value equal to the ... View full abstract»

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Aims & Scope

The Transactions ceased publication in 1962. The current retitled publication is IEEE Transactions on Antennas and Propagation.

Full Aims & Scope