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Transactions of the IRE Professional Group on Antennas and Propagation

Volume 1: 1952

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  • Impedance measurement techniques for two-mode guides

    Publication Year: 1952, Page(s):148 - 152
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2250 KB)

    In this paper, work on ¿ which was partially supported by O.N.R. contract N7onr-29529, the method of impedance measurements in single-mode guide is extended to two-mode guide. Data is presented showing the impedance of a half-wave narrow slot placed parallel to the axis on the broad face of a rectangular wave-guide supporting the TE10 and TE20 nodes. View full abstract»

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  • Polarization switch and universal horn

    Publication Year: 1952, Page(s):135 - 147
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3025 KB)

    The desirability of obtaining a radiating structure such that the polarization of the radiating energy could be varied in a controlled manner and yet provide a radiation pattern whose shape was invariant, led to the investigation which is the subject of this paper. View full abstract»

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  • Modified magic tee phase-shifter

    Publication Year: 1952, Page(s):126 - 134
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2857 KB)

    A magic tee may be used as a microwave phase-shifter by placing adjustable short circuits in its symmetrical arms. A perfect impedance match will exist through the E- and H-plane arms if the distances from the short-circuits to the tee junction differ by (2n + 1)¿ g/4. The phase is shifted by simultaneously varying the distances from the short circuits to the tee junction. Orienting the symmetric... View full abstract»

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  • A broadband microwave quarter-wave plate

    Publication Year: 1952, Page(s):123 - 125
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1886 KB)

    A differential phase shift between two orthogonal TE11 waves in circular hollow waveguide may be achieved with capacitive pins which affect one mode and not the other. Representing the two modes in the guide by two equivalent transmission lines and the pins by shunt susceptances, an analysis of an array of pins may be made to determine, as a function of pin spacing, the required values of suscepta... View full abstract»

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  • An organ-pipe scanner

    Publication Year: 1952, Page(s):113 - 122
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2392 KB)

    In designing many scanning antennas, it is desirable to move a feed horn for an objective, a lens, or a reflector, along a curve on the focal surface of the objective. The most direct way to solve this problem is to move a horn on the desired curve mechanically; however, there are mechanical and electrical problems inherent in this type scanner which one would like to avoid. Another approach is th... View full abstract»

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  • Large slots in circular and rectangular waveguides

    Publication Year: 1952, Page(s):108 - 112
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2307 KB)

    This report, which was supported by the Office of Naval Research under contract N7onr-29529 with the Antenna Laboratory, Institute of Engineering Research, deals with rectangular apertures in the wall of a waveguide whose dimensions are such that the length-to-width ratio is of the order of unity, the length being in the neighborhood of a half wavelength. We speak of these elements loosely as slot... View full abstract»

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  • Thickness effects in slots located in various positions in rectangular waveguide

    Publication Year: 1952, Page(s): 107
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (94 KB)

    Theoretical expressions for the equivalent circuit parameters of slots of finite ¿ wall thickness are obtained in terms of the parameters of aero-thickness slots of identical cross-section dimensions. The thick slots are treated as composite structures consisting of appropriate junctions and lengths of connecting waveguide, and the parameters of the junctions are determined from those of correspo... View full abstract»

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  • Factors affecting the performance of linear arrays

    Publication Year: 1952, Page(s):85 - 106
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3431 KB)

    The primary problem in the design of antenna-arrays is the satisfaction of the requirements of side-lobe level and beamwidth. An additional major consideration which has only recently received an analytical treatment1 is the problem of the deterioration of the beamwidth and side-lobe level arising from the variations in the excitation of each element. These variations are due primarily to the inac... View full abstract»

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  • Slot radiators and arrays at X-band

    Publication Year: 1952, Page(s):62 - 84
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2584 KB)

    Experimental verification of the validity of Stevenson's expression for a longitudinal shunt slot has been obtained. The theoretical expression has been found to be valid throughout X-band. Substantiating curves are shown, Resonant slot lengths as functions of slot dimensions and position on the waveguide are given. Correlation. between the phase angle of the admittance and the phase angle of the ... View full abstract»

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  • Optimum patterns for arrays of non-isotropic sources

    Publication Year: 1952, Page(s):50 - 61
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2488 KB)

    Methods for synthesizing the optimum patterns for arrays of isotropie sources have been given by Dolph and Riblet, using Tchebyscheff polynomials, except for arrays containing an even number of elements spaced less than a half-wavelength. The conditions which the optimum polynomial must satisfy in the latter case will be considered. For arrays of nonisotropic sources, it is possible to establish t... View full abstract»

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  • A statistical approach to the problem of multiple radio interference to FM and television service

    Publication Year: 1952, Page(s):43 - 49
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2440 KB)

    Since the received fields in the uhf and vhf bands vary ¿ widely in time and space, it is believed that, on many occasions, a statistical approach to communication problems may be necessary. It is the purpose of this paper to present a statistical analysis of the problem of FM and television service in the presence of multiple sources of interference. View full abstract»

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  • VHF tropospheric recording measurements of plane and circular polarized waves in the great lakes area

    Publication Year: 1952, Page(s): 42
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1397 KB)

    To investigate the characteristics of circularly-polarized waves as propagated through the troposphere, a field recording station has been set up at Hudson, Ohio. Continuous field intensity recordings have been made of the horizontal and vertical components as well as the circularly-polarized field over a 125-mile path from Columbus, Ohio. The results of these recordings are compared ¿ with recor... View full abstract»

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  • The zero phase-front in microwave optics

    Publication Year: 1952, Page(s):38 - 41
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2097 KB)

    Many microwave optical devices have been designed and studied, at least in part, by the methods of geometrical optics. Common practice in the microwave field has been to focus attention on the family of rays rather than on the surfaces normal to them, the so-called phase-fronts. When phase-fronts are examined, they are usually obtained from the rays by passing along each ray a constant electrical ... View full abstract»

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  • Strip transmission line study

    Publication Year: 1952, Page(s): 37
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1158 KB)

    A TEM transmission line having a circular or rectangular center conductor placed between two parallel plates or inside a rectangular tube, has been used in the construction of a number of uhf antennas and ¿ wave filters. The characteristic impedance of the class of transmission lines, of which the above-mentioned are particular examples, can be theoretically calculated by a number of methods. A r... View full abstract»

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  • Quasi-static solution for diffraction of a plane electromagnetic wave by a small oblate spheroid

    Publication Year: 1952, Page(s):13 - 36
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2860 KB)

    The problem of the diffraction of a plane electromagnetic wave by a small perfectly conducting oblate spheroid for the case of normal incidence has been investigated by an expansion method. By retaining three terms of the exponential function contained in the incident field, it is possible to describe both the incident field and the near-zone scattered field in terms of a finite number of discrete... View full abstract»

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  • A correlation computer and applications to radio propagation

    Publication Year: 1952, Page(s):4 - 12
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2518 KB)

    Correlation functions of data, such as fading radio signals or temperature-and humidity fluctuations of the atmosphere, offer a powerful tool for analysis. By conventional methods, computation of these functions is long and tedious. Thi paper describes a computer which was constructed for this purpose. The data to be studied are transcribed onto magnetic tapes. These tapes are then run through a c... View full abstract»

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  • Publication pians of the professional group on antennas and propagation

    Publication Year: 1952, Page(s):2 - 3
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1905 KB)

    The prompt exchange of information is vital to the progress of any branch of science, and especially so in rapidly changing branches such as antennas and propagation. In order to expedite the dissemination of information in these fields, the Professional Group on Antennas and Propagation is undertaking the periodic publication of groups of articles and reports of interest to the membership. In ord... View full abstract»

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  • [Front matter]

    Publication Year: 1952, Page(s):1 - 3
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    Freely Available from IEEE

Aims & Scope

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

Full Aims & Scope