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Antennas and Propagation, Transactions of the IRE Professional Group on

Volume 2: 1954

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Displaying Results 1 - 8 of 8
  • News and views: "The much-abused decibel"

    Publication Year: 1954 , Page(s): 42 - 45
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  • Why transactions?

    Publication Year: 1954 , Page(s): 41
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  • [Front cover and tabel of contents]

    Publication Year: 1954 , Page(s): c1
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  • On the theory of corrugated plane surfaces

    Publication Year: 1954 , Page(s): 71 - 81
    Cited by:  Papers (40)  |  Patents (1)
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    An analysis is given of an electromagnetic system composed of a rectangular waveguide in tandem with a corrugated waveguide which feeds a flat, corrugated surface of arbitrary length terminated by a ground plane, whose length is also arbitrary. An improved procedure of field determination is used which combines Floquet's theorem and the variational principle, thus revealing an additional requirement on the corrugation geometry. Factors influencing a match at the feed mouth, and satisfactory launching of the surface wave are discussed. The degree of suppression of the feed radiation is given in db as a function of the geometry of the system. Approximate radiation patterns are derived for two cases, (a) when the system is terminated by an infinite ground plane, and (b) when the system is terminated by a finite ground plane. For the latter case, an upper bound on the tilt angle of the main beam and a lower bound on its beamwidth result from an approximate theory. For both cases, the Hansen-Woodyard endfire relation is found to provide beam sharpening even when the feed radiation is considered. The presence of higher order surface modes, their effect, and their elimination are discussed. Comparison of the theory with experiment is reasonably good. View full abstract»

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  • Meteoric radio echoes

    Publication Year: 1954 , Page(s): 82 - 90
    Cited by:  Papers (2)
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    Study of meteoric effects by radio methods has resuited in gain to three fields-astronomy, upper atmosphere physics, and radio propagation. In each of these fields progress is surveyed, and some of the more important unsolved problems are pointed out. View full abstract»

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  • Some stochastic problems in wave propagation--Part II

    Publication Year: 1954 , Page(s): 63 - 70
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    In part I some of the properties of wave energy reflected from surfaces subject to random height variations were investigated in the previous issue. Here we ascertain the effects of refractive index fluctuations within a volume upon the properties of waves traversing the medium. The results are applied to problems encountered in tropospheric and ionospheric wave propagation. View full abstract»

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  • Sweep frequency backscatter--Some observations and deductions

    Publication Year: 1954 , Page(s): 56 - 63
    Cited by:  Papers (3)
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    Sweep-frequency backscatter records have proved to be of great value in identifying the sources of backscatter seen on a fixed frequency by demonstrating the development of the echo as frequency and range increase. The most commonly observed scatter is ground scatter propagated via the F2 layer, but it is also evident that the other layers propagate ground scatter and that scatter from the distant E region may at times be important. In one group of observations over an 1,150-km path on three undisturbed days, the values of F2-layer maximum usable frequency scaled from midpoint vertical-incidence ionospheric records and those determined by backscatter delay assuming ground scatter agreed almost within experimental error. In another three-day group characterized by a low-latitude ionospheric disturbance with low geomagnetic K indexes but considerable sporadic E activity, values of muf determined from scatter were much too high under the ground-scatter assumption, errors of about 30% being not uncommon. View full abstract»

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  • An experimental investigation of the single-wire transmission line

    Publication Year: 1954 , Page(s): 46 - 56
    Cited by:  Papers (3)
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    The results of some measurements made on a dielectric coated wire are presented and compared with theoretical results. These measurements indicate that the single-wire line can be considered as a simple transmission line provided account is taken of the "end-effect." View full abstract»

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Aims & Scope

This Transactions ceased publication in 1955. The current retited publication is IEEE Transactions on Antennas and Propagation.

Full Aims & Scope