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Proceedings of the IRE

Issue 12 • Dec. 1939

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Displaying Results 1 - 19 of 19
  • [Front cover]

    Publication Year: 1939, Page(s): c1
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  • Section Meetings

    Publication Year: 1939, Page(s): c2
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  • Table of contents

    Publication Year: 1939, Page(s): nil1
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  • Information about the Society

    Publication Year: 1939, Page(s): nil2
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  • Synthetic Reverberation

    Publication Year: 1939, Page(s):747 - 752
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3024 KB)

    An electrooptical method for producing reverberation synthetically is described together with a summary of the development work and the various models which have been built. The basic principle consists in recording a fugitive sound pattern of the original program signal on the rim of a rotating phosphorcoated disk by means of a modulated light source and a simple optical system. The signal is pic... View full abstract»

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  • The Scattering of Radio Waves in the Lower and Middle Atmosphere

    Publication Year: 1939, Page(s):753 - 757
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    The evidence relating to the reflection of radio waves from levels below 80 kilometers is considered and apparatus used to investigate the reflection coefficients of these regions is described. The new experimental results here presented are not in agreement with those of earlier workers, but indicate that reflections from region B (below 10 kilometers) and region C (35 to 60 kilometers) are very ... View full abstract»

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  • The Electronic-Wave Theory of Velocity-Modulation Tubes

    Publication Year: 1939, Page(s):757 - 763
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1720 KB)

    Following a brief discussion of the Hahn theory of velocity modulation in which there is explained the basic velocity-modulation tube phenomena by means of space-charge waves propagating along the electron beam, the wave theory is reformulated by means of the retarded potentials for the most important case, that of a magnetically focused electron beam. The use of the potentials is believed to resu... View full abstract»

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  • An Experimental Investigation of the Characteristics of Certain Types of Noise

    Publication Year: 1939, Page(s):763 - 768
    Cited by:  Papers (13)
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    The results of an investigation of the effect of the band width on the effective, average, and peak voltages of several different types of noise are given for band widths up to 122 kilocycles. For atmospheric noise and that due to the thermal agitation of electric charge in conductors, both of which consist of a large number of overlapping pulses, the peak, average, and effective voltages were all... View full abstract»

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  • Biconical Electromagnetic Horns

    Publication Year: 1939, Page(s):769 - 779
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2816 KB)

    Horn antennas for radiating uniformly in a plane are described. The propagation of waves in the biconical-shaped horn, and their radiation from it, are treated analytically. An experimental investigation at a wavelength of 8.3 centimeters shows the detailed behavior of this unique horn, which should find applications to services employing "broadcast" radiation at ultra-high frequencies. View full abstract»

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  • Atmospherics in Radio Broadcast Reception at Calcutta

    Publication Year: 1939, Page(s):780 - 783
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    This paper relates to investigations extending from January to August, 1938, (including winter, summer, and rainy seasons) on atmospheric disturbance in medium- and short-wave bands (0.6 to 6 megacycles) prevalent in the eastern part of India. A suggestion has been made for broadcast transmission standards to be adopted in India on the basis of atmospheric field-strength measurements. Effective se... View full abstract»

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  • Measurements of Currents and Voltages down to a Wavelength of 20 Centimeters

    Publication Year: 1939, Page(s):783 - 789
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2712 KB)

    The more common circuits in which diode voltmeters are used are discussed in Section I. The properties of these circuits are analyzed on the basis of the diode characteristics, with special reference to the input impedance. In Section II, two devices are described for current measurements, a hot-wire air-expansion device and thermocouples of special construction. Consideration of the requirements ... View full abstract»

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  • Characteristics of the Ionosphere at Washington, D.C., October, 1939, with Predictions for January, 1940

    Publication Year: 1939, Page(s):789 - 790
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (479 KB)

    Data on the ordinary-wave critical frequencies and virtual heights of the ionospheric layers are presented for the period indicated in the title. The monthly average values of the maximum usable frequencies for undisturbed days, for radio transmission by way of the regular layers is also provided. View full abstract»

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  • Institute news and radio notes

    Publication Year: 1939, Page(s):791 - 799
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  • Contributors

    Publication Year: 1939, Page(s): 800
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  • Commercial Engineering Developments

    Publication Year: 1939, Page(s):ii - vii
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    First Page of the Article
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  • Current Literature

    Publication Year: 1939, Page(s): vii
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  • Engineering directory [advertisement]

    Publication Year: 1939, Page(s): viii
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  • Index [of advertisers]

    Publication Year: 1939, Page(s): viii
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  • Positions open

    Publication Year: 1939, Page(s): viii
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Aims & Scope

This Periodical ceased production in 1962. The current retitled publication is Proceedings of the IEEE.

Full Aims & Scope