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IEEE Transactions on Antennas and Propagation

Issue 1 • Date January 1972

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Displaying Results 1 - 25 of 35
  • [Front cover and table of contents]

    Publication Year: 1972, Page(s): 0
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    Freely Available from IEEE
  • Comments on "On a new condition for physical realizability of planar antennas"

    Publication Year: 1972, Page(s):113 - 114
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    First Page of the Article
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  • [Back cover]

    Publication Year: 1972, Page(s): c4
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    Freely Available from IEEE
  • Sidelobe control of antenna patterns

    Publication Year: 1972, Page(s):102 - 104
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    Using the iterative sampling method, sidelobe peaks can be made to conform to a specified shape within a given tolerance. The iterative sampling method allows the specifications for a given problem to be just satisfied, thereby avoiding an overdesigned pattern which may have a complicated current distribution or wide main beam. The type of calculations involved are typically only summations of ser... View full abstract»

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  • A double parasitic loop counterpoise antenna and its application to aircraft navigation systems

    Publication Year: 1972, Page(s):97 - 99
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    The radiation properties of a double parasitic loop counterpoise antenna capable of bringing out superior performance from the existing VHF omnirange (VOR) systems are discussed. It is shown that such an antenna when suitably designed will reduce considerably the siting errors inherent in the existing VOR systems. View full abstract»

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  • Design and performance of four buried UHF antennas

    Publication Year: 1972, Page(s):56 - 62
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (776 KB)

    As a result of a 10-month study by the Institute for Telecommunication Sciences, four UHF antennas were designed and fabricated, and their absolute power gains for elevation angles from 1\deg to 45\deg and azimuthal patterns at 5\deg elevation angle were measured with each antenna ... View full abstract»

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  • First-order theory and analysis of MF/HF/VHF scatter from the sea

    Publication Year: 1972, Page(s):2 - 10
    Cited by:  Papers (144)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1016 KB)

    Scatter from the sea near grazing from MF through VHF is analyzed in this paper. Results based on the compensation theorem show that the dependence upon the grazing angles, as well as upon frequency, range, and the effective surface impedance, can be removed for vertical polarization as the familiar "Norton attenuation factors." Time variation of the surface is included, and results are derived fo... View full abstract»

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  • An effective medium description for a random uniaxial anisotropic medium with small-scale fluctuations

    Publication Year: 1972, Page(s):110 - 112
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    Some properties of the electromagnetic field are determined for an unbounded medium characterized by a permittivity tensor whose elements can be expressed as the sum of two terms, one deterministic and the other random. The deterministic and random parts of the permittivity tensor are considered to be uniaxial anisotropic; thus it is a diagonal tensor where two of the three elments are equal. Star... View full abstract»

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  • Radiation from slot antennas on cones

    Publication Year: 1972, Page(s):36 - 39
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    Integral representations are given for the radiation field from slots on the surface of a semi-infinite conducting cone. The corresponding normal mode representations for delta function circumferential slots are evaluated numerically for various cone angles, slot positions, and azimuthal variations. Experimentally measured patterns for two finite models are reported and compared with the semi-infi... View full abstract»

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  • Experimental results of a multifrequency array antenna

    Publication Year: 1972, Page(s):106 - 107
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    An array antenna containing three arrays of interlaced radiating elements with operating frequencies in L, S , and C bands are described. Measured results include radiation patterns, crosspolarization data, gain, impedance, and mutual coupling measurements. The interlacing of elements of different arrays into a single ape... View full abstract»

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  • Compensation of spherical reflector aberrations by planar array feeds

    Publication Year: 1972, Page(s):49 - 56
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    The feasibility of correcting phase aberrations of spherical reflector antennas with planar array feeds has been investigated. This type of feed seems to be particularly attractive for applications requiring several closely spaced beams. A synthesis procedure for the array excitation has been developed which minimizes the mean-square error with respect to a prescribed reflector illumination. This ... View full abstract»

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  • Difference pattern null depth and angular accuracy

    Publication Year: 1972, Page(s):99 - 100
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    It is common to specify a large (in dB) null depth of the difference pattern of monopulse radars. This communication shows that this is not necessary from the points of view of angular precision and accuracy. View full abstract»

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  • A dielectric-loaded circular waveguide antenna

    Publication Year: 1972, Page(s):96 - 97
    Cited by:  Papers (8)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    A highly directive antenna of simple and lightweight structure is designed and tested experimentally. It consists of a dielectric rod with conical hole loading an open-ended circular waveguide. The test has shown that three different radiation patterns can be obtained depending on the depth of penetration of the rod inside the waveguide. Also an improvement on the axial gain can be obtained when t... View full abstract»

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  • IEEE standards publications and activities of interest to G-AP membership

    Publication Year: 1972, Page(s):1 - 2
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  • A broad-banded folded monopole antenna

    Publication Year: 1972, Page(s):92 - 94
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Electrically short folded monopole antennas with lumped mutual coupling between driven and folded sections are considered, showing that the input radiative impedance exhibits a resonance frequency depending upon the sign and magnitude of the coefficient of coupling. If extended to " n -folded" monopoles with separate lumped mutual couplings, the analysis shows ... View full abstract»

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  • Diffraction coefficients for a slot-excited conical antenna

    Publication Year: 1972, Page(s):40 - 49
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    First-order diffraction coefficients for a slot-excited conical antenna are calculated, beginning with integral expressions for the radiation field. Simple formulas based on these coefficients are presented for the radiation patterns that correctly reproduce the interference structure as well as predict the magnitude of the field down to quite low frequencies. Plots of the diffraction coefficients... View full abstract»

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  • A novel small array technique for active phased array impedance measurement

    Publication Year: 1972, Page(s):107 - 110
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    A modified small array technique for measuring both amplitude and phase of the active reflection coefficient is described. The method which does away with corporate feeding and phase shifters utilizes space feeding and employs a slotted line in the central element. Measurements on an 11 by 11 element array indicate feasibility of the method for simulation of large arrays. View full abstract»

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  • Reflection from the aperture of a long E -plane sectoral horn

    Publication Year: 1972, Page(s):62 - 68
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    The complex reflection coefficient of a long E -plane sectoral horn is derived using the geometrical theory of diffraction. Single diffraction alone is shown to be sufficient to describe the contribution from the E (widely separated) edges, while singly and doubly diffracted fields from the ... View full abstract»

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  • Comparison of square array directivity formulas

    Publication Year: 1972, Page(s):100 - 102
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (320 KB)

    Directivity of rectangular planar arrays is often approximated using the directivity of two constituent linear arrays, either of dipoles or isotropic elements. A result has been derived for directivity of a rectangular planar array of short dipoles (in the plane of the array) using a method from Forman. The severe approximate directivity calculations are compared with this more accurate result. Cu... View full abstract»

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  • A basis transformation technique with application to scattering by wires

    Publication Year: 1972, Page(s):80 - 82
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    A numerical basis transformation technique is described which may be applied, in conjunction with point-matching methods (e.g., piecewise uniform or piecewise linear methods), to obtain least-square solutions of electromagnetic scattering by thin wires. It is shown that reductions in both computer solution time and computer storage requirements result. The technique is demonstrated by applying it ... View full abstract»

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  • The scattering from curved rough surfaces of an EM wave transmitted through a turbulent medium

    Publication Year: 1972, Page(s):19 - 30
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1128 KB)

    A generalized analysis of electromagnetic (EM) wave scattering from rough surfaces yields an expression for mean scattered power flux which is the spatial Fourier transform of the product of three transfer functions: 1) the optical transfer function (OTF) of the propagating medium; 2) the joint characteristic function of the surface roughness; and 3) a coherence involving the mean surface and the ... View full abstract»

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  • Beam formation in anisotropic structures

    Publication Year: 1972, Page(s):112 - 113
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    A localized source radiating in anisotropic environment with directionally dependent attenuation produces a beam. The direction and width of this beam are calculated asymptotically. View full abstract»

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  • Temporal frequency spectra of multifrequency waves in turbulent atmosphere

    Publication Year: 1972, Page(s):10 - 19
    Cited by:  Papers (28)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (728 KB)

    General formulations for temporal frequency spectra of the fluctuations of plane, spherical, and beam waves operating at two frequencies are given based on weak turbulence and frozen-in assumptions. The cross spectra and the coherence are obtained for the amplitude at two frequencies, the phase at two frequencies, and the amplitude at one frequency and the phase at another frequency. The results a... View full abstract»

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  • Perturbation calculation of the scattering of electromagnetic waves by an underdense plasma layer

    Publication Year: 1972, Page(s):78 - 80
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    A perturbation technique has been utilized to obtain the scattering of electromagnetic waves by an underdense plasma layer for Gaussian, sech2, and parabolic density distribution, and the calculations compared with accurate solutions. The results for the reflection are good at small values of plasma width, but (except for the parabolic case) decrease too rapidly at large plasma widths. ... View full abstract»

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  • Aperture efficiency enhancement in dielectrically loaded horns

    Publication Year: 1972, Page(s):69 - 74
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    The effect of symmetrically loading a horn aperture with E -plane dielectric slabs is examined both theoretically and experimentally. It is shown that aperture efficiencies of the order of 92-96 percent may be obtained easily and inexpensively. The technique, which was demonstrated experimentally for a small horn aperture, might find application in limited scan... View full abstract»

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Aims & Scope

IEEE Transactions on Antennas and Propagation includes theoretical and experimental advances in antennas.

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Meet Our Editors

Editor-in-Chief                                                 Kwok W. Leung