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IRE Transactions on Antennas and Propagation

Volume 4 Issue 4 • October 1956

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Displaying Results 1 - 17 of 17
  • [Front cover and table of contents]

    Publication Year: 1956, Page(s): 0
    Request permission for commercial reuse | PDF file iconPDF (117 KB)
    Freely Available from IEEE
  • News and views

    Publication Year: 1956, Page(s):587 - 591
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  • Circularly-polarized biconical horns

    Publication Year: 1956, Page(s):592 - 596
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    A new technique is described for obtaining circular polarization from a biconical horn. This polarization is obtained through use of a spatial array of thin conducting elements between the cone faces; orientation of the elements varies with distance from the feed. The method has been used successfully atSband andXband. This technique was applied to horns which have maximum ra... View full abstract»

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  • Phase centers of microwave antennas

    Publication Year: 1956, Page(s):597 - 600
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (347 KB)

    This paper is concerned with the location of the phase centers of microwave antennas. The inadequacy of conventional aperture theory for the accurate description of phase centers is discussed. Formulas are developed and, for numerical indications, calculations are made for paraboloidal reflectors of differentf/Dratios and a class of primary patterns which provide an approximate represen... View full abstract»

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  • A new method for the measurement of the average dielectric constant of the underground medium on site

    Publication Year: 1956, Page(s):601 - 604
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    An electromagnetic interference pattern in the far-distance condition is utilized to determine the average dielectric constant of the underground propagational medium. The method depends upon the determination of the surface wave velocity by means of measuring the first self-resonance frequency of a dipole wire laid on the earth's surface. View full abstract»

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  • The image method of beam shaping

    Publication Year: 1956, Page(s):604 - 609
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (469 KB)

    The image scheme of beam shaping for use at microwave frequencies is described. Cosecant-squared radiation patterns are obtained with parabolic reflectors no larger than those required to give pencil beams of commensurate beam widths. Radiation patterns calculated using diffraction theory are compared with measured patterns of a paraboloidal dish fed by a horn feed and one image horn. Experimental... View full abstract»

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  • Loop antenna measurements

    Publication Year: 1956, Page(s):610 - 618
    Cited by:  Papers (16)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (900 KB)

    Experimental measurements on three loop antenna configurations are presented. The technique for obtaining impedance and current distributions using a single-wire transmission line over an image plane is described with particular attention given to the difficulties encountered. The results are reproduced in graphical form, and for loops where theoretical results are available, curves comparing theo... View full abstract»

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  • Systematic errors caused by the scanning of antenna arrays: Phase shifters in the branch lines

    Publication Year: 1956, Page(s):619 - 627
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (726 KB)

    By choosing a suitable equivalent circuit representation for an array-type scanning antenna with the phase shifters in its branch lines, a general expression is derived for the radiation pattern in terms of the active impedances of the radiating elements, the incremental phase shift between elements, and the desired aperture distribution. If the active impedances of the radiating elements vary wit... View full abstract»

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  • A high-performance conically-scanning X-band antenna of novel design

    Publication Year: 1956, Page(s):628 - 631
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (457 KB)

    A conically-scanning antenna is described which consists of a scanner mechanism, rear feed, and 8-foot diameter parabololoid producing a pencil beam having equalE-andH-plane beamwidths. The polarization may be quickly changed from linear to circular to vertical polarization. The sense of the polarization is readily changed from left-hand to right-hand. The replacement of one ... View full abstract»

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  • Slot admittance data at Kaband

    Publication Year: 1956, Page(s):632 - 636
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (506 KB)

    Admittance data on transverse edge slots in RG-96/U waveguide can be obtained by a technique called the moving lossy short technique. By this technique the radiation attenuation of a test section of identical slots can be determined. It is then possible to specify both the slot inclination angle and the slot depth of cut required to yield any conductance with in the range of measurements. These da... View full abstract»

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  • Radiation by disks and conical structures

    Publication Year: 1956, Page(s):637 - 640
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (395 KB)

    The Lebedev integral transform is applied to a class of boundary value problems in the theory of diffraction and antennas, including circular disks, apertures and hollow conical structures. It is found that the conventional Wiener-Hopf technique, together with this transform, does not explicitly solve these problems. Instead, one is led to an infinite system of linear equations for the representat... View full abstract»

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  • Diffraction of microwaves by tandem slits

    Publication Year: 1956, Page(s):640 - 649
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1289 KB)

    The diffraction of a plane electromagnetic wave by two identical slits in tandem is investigated for normal incidence with the polarization parallel to the edges of the slits. Theory shows that the scattering cross-section coefficient is proportional to the imaginary part of the far field forward scattering factor. The stationary form of the scattering cross section is developed in terms of the in... View full abstract»

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  • Transmission characteristics of inclined wire gratings

    Publication Year: 1956, Page(s):650 - 654
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    Small diameter parallel wires were imbedded in thin plastic sheets and located closely before an antenna dish receiving plane waveXband energy. Polarization was parallel to the wires, and the grating interval was varied between a fifth-wavelength and a whole wavelength for different panels. Received intensity was measured for varied grating tilt angles about an axis lying parallel to th... View full abstract»

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  • On resonance in infinite gratings of cylinders

    Publication Year: 1956, Page(s):654 - 661
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (815 KB)

    The diffraction by a grating is examined (for spacing large compared to wavelength and dimension of grating element) for wavelengths in the neighborhood of the "Rayleigh" wavelengths. The shape of the elements, and their size in wavelengths is unrestricted. The results, including the effect of interaction, are expressed in terms of quantities relating to single scattering. Some properties of certa... View full abstract»

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  • Line-of-site wave propagation in a randomly inhomogeneous medium

    Publication Year: 1956, Page(s):661 - 665
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (460 KB)

    Theoretical calculations have been made, using the single-scattering approximation, for propagation in a randomly inhomogeneous medium in which the deviations of refractive index from the mean are small. The statistical quantities considered were the variance, correlation function, and power spectrum for the phase and relative amplitude of the field at a point and their differences at two points. ... View full abstract»

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  • Partially reflecting sheet arrays

    Publication Year: 1956, Page(s):666 - 671
    Cited by:  Papers (411)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (619 KB)

    Multiple reflections of electromagnetic waves between two planes are studied, and the increase in directivity that results by placing a partially reflecting sheet in front of an antenna with a reflecting screen is investigated at a wavelength of 3.2 cm. The construction and performance of various models of such arrays is discussed. Thus, for example, a "reflex-cavity antenna" with an outer diamete... View full abstract»

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  • [Back cover]

    Publication Year: 1956, Page(s): c4
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    Freely Available from IEEE

Aims & Scope

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

Full Aims & Scope