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Proceedings of the IRE

Issue 8 • Date Aug. 1949

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Displaying Results 1 - 25 of 29
  • Table of contents

    Publication Year: 1949, Page(s): 849
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  • William L. Everitt, Board of Directors, 1949-1951

    Publication Year: 1949, Page(s): 850
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  • The Valuable By-Product

    Publication Year: 1949, Page(s): 851
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    First Page of the Article
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  • Path-Length Microwave Lenses

    Publication Year: 1949, Page(s):852 - 855
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3304 KB)

    Lens antennas for microwave applications are described which produce a focusing effect by physically increasing the path lengths, compared to free space, of radio waves passing through the lens. This is accomplished by means of baffle plates which extend parallel to the magnetic vector, and which are either tilted or bent into serpentine shape so as to force the waves to travel the longer-inclined... View full abstract»

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  • Mercury Delay Line Memory Using a Pulse Rate of Several Megacycles

    Publication Year: 1949, Page(s):855 - 861
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4224 KB)

    A mercury delay line memory system for electronic computers, capable of operating at pulse repetition rates of several megacycles per second, has been developed. The high repetition rate results in a saving in space and a reduction in access time. Numerous improvements in techniques have made the high repetition rate possible. The use of the pulse envelope system of representing data has effective... View full abstract»

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  • Correction

    Publication Year: 1949, Page(s): 861
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  • An Analysis of Magnetic Amplifiers with Feedback

    Publication Year: 1949, Page(s):862 - 866
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1160 KB)

    Two ways of obtaining feedback in magnetic amplifiers are studied. One, termed external feedback, employs a bridge rectifier and separate feedback coils, while the other, termed self feedback, uses two rectifiers so disposed that separate feedback windings are unnecessary. Commutation of the rectifiers, apparently not considered heretotore, is shown to be of major importance. The calculated curren... View full abstract»

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  • Electrical Network Analyzers for the Solution of Electromagnetic Field Problems

    Publication Year: 1949, Page(s):866 - 872
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    This is the second part of a paper on the design, construction, testing, and operation of electrical networks capable of obtaining solutions of the wave equation in both two-dimensional, axially symmetric, cylindrical co-ordinates and rectangular co-ordinates. The circuit yields information on TEM, TMom(n) and TEom(n) modes of concentric lines, waveguides, and resonators. Fie... View full abstract»

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  • Design of Optimum Transient Response Amplifiers

    Publication Year: 1949, Page(s):873 - 879
    Cited by:  Papers (3)
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    This paper describes a method based entirely upon transient considerations for the design of amplifiers with optimum transient response in the "least squared" sense. This method is applicable to video amplifiers, symmetrical band-pass amplifiers, and dissymmetrical band-pass amplifiers used with low-level modulation, and has provisions for taking into account noise acceptance and adjacent channel ... View full abstract»

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  • Admittance of the 1B25 Microwave Switching Tube

    Publication Year: 1949, Page(s):879 - 881
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (744 KB)

    The operation of an RCA-1B25 neon-argon-filled glow tube as a switching element in a transmission-line network at ultra-high frequencies has been investigated. A test method has been developed and theory formulated for evaluating the behavior of the tube in terms of an equivalent susceptance and conductance. Experimental measurements have been made which show the variation of the admittance charac... View full abstract»

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  • Bridged Reactance-Resistance Networks

    Publication Year: 1949, Page(s):882 - 887
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1104 KB)

    Consideration is given to the various possible six-arm, six-element RC bridged networks of which the parallel-tee is the previously known example. It is found that six symmetrical RC structures exist having the infinite attenuation property of the parallel-tee and other properties differing from those of this structure. The duality of certain pairs of such structures is demonstrated. View full abstract»

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  • Ionospheric Virtual Height Measurements at 100 Kilocycles

    Publication Year: 1949, Page(s):887 - 894
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5216 KB)

    A simple high-power ionosphere sounding equipment for use at low frequencies is described. Its application to the measurement of virtual height at vertical incidence at a carrier frequency of 100 kc is reported. Results of nearly a year of intermittent night-time measurements showed a remarkably large variation in virtual height which ranged from about 84 km to as high as 106 km. Some evidence was... View full abstract»

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  • The Demodulation of a Frequency-Modulated Carrier and Random Noise by a Discriminator

    Publication Year: 1949, Page(s): 895
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    First Page of the Article
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  • Discussion on "Application of Velocity-Modulation Tubes for Reception at U.H.F. and S.H.F." (M. J. O. Strutt and A. Van Der Ziel)

    Publication Year: 1949, Page(s):896 - 900
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  • Contributors to the Proceedings of the I.R.E.

    Publication Year: 1949, Page(s):900 - 902
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  • Institute news and radio notes

    Publication Year: 1949, Page(s):903 - 907
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  • Books

    Publication Year: 1949, Page(s):907 - 909
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  • IRE People

    Publication Year: 1949, Page(s):909 - 911
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  • Cover Sheet for Technical Memoranda-A Technique in Information Exchange

    Publication Year: 1949, Page(s):912 - 913
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    An account is given of the origin and use of a routine for disseminating new technical information and ideas rapidly and flexibly through the large engineering and research organization of Bell Telephone Laboratories. The essential philosophy back of this routine is that technical memoranda have the status only of the individual engineer's personal authority, and hence may be circulated directly a... View full abstract»

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  • Radioactive Standards and Methods of Testing Instruments Used in the Measurement of Radioactivity

    Publication Year: 1949, Page(s):913 - 922
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    A summnary of the program for standardization of radioisotopes at the National Bureau of Standards is given in this paper, with some of the reasons for need of absolute measurements of radioisotopes in particular uses. This is accompanied by an outline of some of the methods used to ascertain characteristics of commercial instruments used in the measurement of radioactivity, with particular emphas... View full abstract»

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  • The Columbia Long-Playing Microgroove Recording System

    Publication Year: 1949, Page(s):923 - 927
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1848 KB)

    The Columbia LP (long-playing) microgroove recording system was developed to fill the need for music reproduction which would avoid interruptions not intended by the composer, and which would be of excellent quality at a reasonable cost. This allimportant factor of cost and the public's familiarity with the handling of phonograph records made it desirable to solve the task on the basis of records,... View full abstract»

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  • Direct Voltage Performance Test for Capacitor Paper

    Publication Year: 1949, Page(s):927 - 931
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    Performance of capacitors on accelerated life test may vary over a wide range depending upon the capacitor paper used. Indeed, at present a life test appears to be the only practical means for evaluating capacitor paper, since, within the limits observed in commercial material, the chemical and physical tests usually made do not correlate with life. Lack of correlation is ascribed to obscure physi... View full abstract»

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  • Some Aspects of Cathode-Follower Design at Radio Frequencies

    Publication Year: 1949, Page(s):932 - 937
    Cited by:  Papers (4)
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    Pertinent high-frequency design data including the circuit gain, the gain phase angle, the input impedance in resistive and reactive components, and the maximum allowable input signal voltage may be determined quickly from simple design charts derived by approximations which are applicable over a wide range of frequency and circuit parameters. The only circuit quantities required for use of the ch... View full abstract»

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  • Noise from Current-Carrying Resistors 20 to 500 Kc

    Publication Year: 1949, Page(s):938 - 942
    Cited by:  Papers (2)
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    Measurements have been made of the effect, first studied by Bernamont that when a direct current is flowing through certain types of resistors, the noise voltage generated at their terminals is considerably in excess of the thermal value. The effect has been investigated for solid carbon-composition, "metallized," palladium film, and "cracked-carbon" resistors, for resistance values from 1,000 to ... View full abstract»

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  • An Analysis of the Sensing Method of Automatic Frequency Control for Microwave Oscillators

    Publication Year: 1949, Page(s):943 - 951
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1736 KB)

    An analysis is made of the type of automatic-frequency-control circuit that uses a simple cavity resonator for the stable element and either frequency modulation of the controlled oscillator or modulation of the cavity resonance frequency to obtain effective discriminator curves which give a null output for a frequency equal to the average cavity resonance frequency. An analysis is made of the com... View full abstract»

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Aims & Scope

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

Full Aims & Scope