Proceedings of the Institute of Radio Engineers

Issue 12 • Dec. 1937

 This issue contains several parts.Go to:  Part Supplement 

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  • [Front cover]

    Publication Year: 1937, Page(s): c1
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  • Institute of Radio Engineers - Forthcoming Meetings

    Publication Year: 1937, Page(s): c2
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  • Contents

    Publication Year: 1937, Page(s): i
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  • General Information

    Publication Year: 1937, Page(s): ii
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  • Institute sections

    Publication Year: 1937, Page(s): iii
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  • Geographical Location of Members Elected November 3, 1937

    Publication Year: 1937, Page(s): iv
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  • Applications for Membership

    Publication Year: 1937, Page(s):v - vi
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  • Officers and Board of Directors

    Publication Year: 1937, Page(s): vii
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  • Institute news and radio notes

    Publication Year: 1937, Page(s):1505 - 1516
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  • Minimum Noise Levels Obtained on Short-Wave Radio Receiving Systems

    Publication Year: 1937, Page(s):1517 - 1530
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1952 KB)

    The theoretical minimum noise level of receivers in the absence of any interference, the source of which is external to the receiver, is discussed and compared with the limit actually measured on various antennas over a limited frequency range in the short-wave spectrum. It is pointed out that, on the shorter wave lengths and in the absence of man-made interference, the usable signal strength is g... View full abstract»

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  • Measuring the Reflecting Regions in the Troposphere

    Publication Year: 1937, Page(s):1531 - 1541
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2656 KB)

    During the routine investigation of the E and F regions of the ionosphere, it was found that the supposed ground wave was undergoing severe fluctuations. This phenomenon pointed to reflections from regions at low atmospheric heights. In order to separate these reflections from the ground wave, it was necessary to design a device for producing very short pulses and to make a rapid sweep for the osc... View full abstract»

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  • Experiments with Underground Ultra-High-Frequency Antenna for Airplane Landing Beam

    Publication Year: 1937, Page(s):1542 - 1560
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2656 KB)

    Experiments are described on the electrical properties of an ultra-high-frequency transmitting antenna operating very near to and below the ground surface. The work was done with the purpose of locating the landing beam in the center of an airport in order to secure a steeper approach path and to provide for landing service for different wind directions. The effect of the proximity of the ground t... View full abstract»

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  • On the Optimum Length for Transmission Lines Used as Circuit Elements

    Publication Year: 1937, Page(s):1561 - 1564
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    The existence of an optimum length for transmission lines which are tuned by low-loss capacitor to give maximum sending-end impedance is discussed. This optimum length is found to be 0.185λ for a shorted line and 0.472λ for an open-circuited line, resulting in impedances 14 and 3 per cent higher, respectively, than can be obtained from lines without tuning condensers. View full abstract»

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  • Note on Large Signal Diode Detection

    Publication Year: 1937, Page(s):1565 - 1573
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1016 KB)

    Several articles have appeared in the last few years on large signal detection, which placed emphasis upon the avoidance or minimizing of distortion. The most serious form of distortion in ordinary diode circuits is due to "nontracking," or the failure of the tube to become conducting for each peak of the impressed voltage. It is shown that the previously derived criterion for just avoiding nontra... View full abstract»

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  • Theory of Loop Antenna with Leakage between Turns

    Publication Year: 1937, Page(s):1574 - 1594
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    The theory of the receiving loop antenna of two turns with distributed leakage, conductive and reactive, is developed. Equations are derived for currents and voltages along the loop and at the terminals. For terminal currents and voltages the effect of leakage may be expressed by means of a single function H, and the loop may be represented by an equivalent two-mesh circuit of lumped constants. Th... View full abstract»

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  • The Clarification of Average Negative Resistance with Extensions of Its Use

    Publication Year: 1937, Page(s):1595 - 1616
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2864 KB)

    A treatment of the subject of negative resistance and the application to the problem of nonlinear oscillations shows the necessity of clarifying the meaning attached to the commonly used term "average" negative resistance. An average effective resistance Rn, based on a simple energy consideration, is introduced which when applied to the above problem affords a correct prediction of the ... View full abstract»

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  • Effects of Tuned Circuits upon a Frequency Modulated Signal

    Publication Year: 1937, Page(s):1617 - 1647
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2624 KB)

    Prior investigations indicated that the frequency modulated receiver would always respond to the signal having the largest amplitude. Thus, selective circuits would be required to pick out a desired signal existing simultaneously with a number of other signals. The first item considered in this paper is that the signal carrier is tuned to the steep side of the resonance curve. It is found that in ... View full abstract»

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  • Characteristics of the Ionosphere at Washington, D.C., October, 1937

    Publication Year: 1937, Page(s):1648 - 1651
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    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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  • Contributors to this issue

    Publication Year: 1937, Page(s):1652 - 1653
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Aims & Scope

This Periodical ceased production in 1938. The current retitled publication is Proceedings of the IEEE.

Full Aims & Scope