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Proceedings of the IRE

Issue 11 • Nov. 1949

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Displaying Results 1 - 25 of 31
  • Table of contents

    Publication Year: 1949, Page(s): 1233
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  • Raymond A. Heising, Board of Directors-1949

    Publication Year: 1949, Page(s): 1234
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  • Feedback

    Publication Year: 1949, Page(s): 1235
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

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  • Pulse-Multiplex System for Distance-Measuring Equipment (DME)

    Publication Year: 1949, Page(s):1236 - 1242
    Cited by:  Papers (1)
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    Distance-measuring equipment (DME), developed for the USAF and CAA, providing automatic distance indications for aircraft navigation is described. Distance is measured with respect to a ground transpondor beacon by the length of time elapsing between the transmission of a pulse "interrogation" signal from the aircraft and the reception of a similar pulse "reply" from the beacon. Traffic to and fro... View full abstract»

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  • A Michelson-Type Interferometer for Microwave Measurements

    Publication Year: 1949, Page(s):1242 - 1244
    Cited by:  Papers (2)
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    The optical Michelson interferometer is modified by replacing one of its branches by a directional coupler and a waveguide. The instrument serves many purposes, among which are: precision wavelength determination, the measurement of dielectric constants of materials available in sheet form, the determination of reflection from laminated sheets at normal incidence, the study of metal-loaded dielect... View full abstract»

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  • Power Meter for Communication Frequencies

    Publication Year: 1949, Page(s):1245 - 1246
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    An instrument for measuring the power delivered to an antenna at communication frequencies is described. View full abstract»

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  • Microanalysis of Gas in Cathode Coating Assemblies

    Publication Year: 1949, Page(s):1247 - 1251
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    A study of gases evolved from oxide-coated cathode assemblies was made during degassing and activation conditions. It was found, first, that the volume and nature of gases evolved from uncoated nickel cathode sleeves were practically independent of the three different cleaning methods used; and, second, that hydrogen-fired cathodes liberated slightly larger quantities of hydrogen when heated in va... View full abstract»

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  • On the Theory of Axially Symmetric Electron Beams in an Axial Magnetic Field

    Publication Year: 1949, Page(s):1252 - 1258
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1208 KB)

    One of the more perplexing problems in the design of klystrons and traveling-wave tubes has been the formation of well collimated electron beams. An axially symmetric form of an electron beam is proposed in which the space-charge repulsive forces are just balanced by magnetic focusing forces so that the beam may be made as long as desirable without any change in its cross section. The equations go... View full abstract»

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  • Modes in Interdigital Magnetrons

    Publication Year: 1949, Page(s):1258 - 1263
    Cited by:  Papers (3)
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    The increasing interest in pill-box-cavity interdigital magnetrons has led to the desirability of a set of design equations by which the resonant wavelengths and external Q's for the various modes of these magnetrons may be calculated. This paper presents these equations and their derivations, and shows how the results check the experimental observations. View full abstract»

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  • The Solution of Steady-State Problems in FM

    Publication Year: 1949, Page(s):1264 - 1269
    Cited by:  Papers (1)
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    If a physical network is approximated by a polynomial, the output wave may be expressed in terms of the derivatives of the input wave. This fact may be used to advantage in the solution of steady-state problems in FM, when the sideband method is impractical and the quasi-steady-state method invalid. If the range of approximation of the network function coincides with the nonnegligible part of the ... View full abstract»

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  • Input Impedance of Wide-Angle Conical Antennas Fed by a Coaxial Line

    Publication Year: 1949, Page(s):1269 - 1271
    Cited by:  Papers (65)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    The input impedances for conical antennas fed by a coaxial line have been computed for several flare angles. A graph of the auxiliary functions ςn(x) is included to facilitate impedance calculation for any large flare angle. View full abstract»

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  • An Analysis of Distortion Resulting from Two-Path Propagation

    Publication Year: 1949, Page(s):1272 - 1277
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1176 KB)

    It is shown that the nonlinear distortion caused by two-path propagation for the case of amplitude modulation is a result of overmodulation in the resultant signal. This distortion becomes severe only when the time delay on the secondary path is large and the amplitudes are nearly equal. In the case of an FM system, the instantaneous frequency of the resultant signal has sharp, spike-shaped variat... View full abstract»

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  • Theoretical Study of Pulse-Frequency Modulation

    Publication Year: 1949, Page(s):1277 - 1286
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2920 KB)

    In this paper, we study the pulse-frequency modulation method in pulse communication. We do not restrict ourselves to the case when the number of samples per period of our signal, as well as per unit time, is very large. Hence, the accuracy in reconstruction of the signal will depend not only on the number of sampling points per period, but also upon their distribution. We shall assume a fixed ave... View full abstract»

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  • Application of Fourier Transforms to Variable-Frequency Circuit Analysis

    Publication Year: 1949, Page(s):1287 - 1290
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    Fourier transforms are very valuable for the analysis of the behavior of passive circuits when the driving force is frequency modulated. The output current or voltage is expressed in the form of a convolution integral, which can lead either to the expansion given by Carson and Fry or, preferably, to the van der Pol expansion in terms of the values of the transfer admittance or impedance for the in... View full abstract»

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  • Contributors to Proceedings of the I.R.E.

    Publication Year: 1949, Page(s):1291 - 1292
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  • Correspondence

    Publication Year: 1949, Page(s):1293 - 1296
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  • Institute news and radio notes

    Publication Year: 1949, Page(s):1297 - 1304
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  • Books

    Publication Year: 1949, Page(s):1304 - 1305
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  • IRE Section Chairmen

    Publication Year: 1949, Page(s): 1306
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  • Off the Editor's Chest

    Publication Year: 1949, Page(s):1307 - 1308
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  • Special Relativity and the Electron

    Publication Year: 1949, Page(s):1308 - 1314
    Cited by:  Papers (1)
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  • An Electronic Differential Analyzer

    Publication Year: 1949, Page(s):1315 - 1324
    Cited by:  Papers (5)
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    An electronic differential analyzer is described, capable of solving ordinary differential equations of orders through the sixth, both linear and nonlinear, and with coefficients that are either constant or variable. This analyzer has a high speed of operation and is extremely flexible with regard to equation parameters and initial conditions. The flexibility permits rapid investigation of wide ra... View full abstract»

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  • Frequency Changers and Amplifiers with Constant Gain

    Publication Year: 1949, Page(s):1324 - 1327
    Cited by:  Papers (2)
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    A method of applying negative feedback to a frequency changer by using a similar frequency changer in the feedback path is described. When the reduction of conversion gain due to the feedback is adjusted to 6 db, then complete stability is obtained against small and equal changes in the gain (or loss) of each frequency changer. Provided both do change equally, then for ±2-db change in each, t... View full abstract»

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  • A Variable Phase-Shift Frequency-Modulated Oscillator

    Publication Year: 1949, Page(s):1328 - 1330
    Cited by:  Papers (4)
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    The theory of operation of a phase-shift type of oscillator is discussed briefly. This oscillator consists of a broad-band amplifier, the output of which is fed back to the input through an electronic phase-shifting circuit. The instantaneous frequency is controlled by the phase shift through this latter circuit. True FM is obtained in that frequency deviation is directly proportional to the insta... View full abstract»

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  • The Reactance-Tube Oscillator

    Publication Year: 1949, Page(s):1330 - 1331
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    The reactance-tube oscillator is a combination reactance-tube circuit and oscillator circuit which uses but a single tube. It has two forms-one derived from the capacitive reactance-tube circuit and one from the inductive reactance-tube circuit; with slight variations the first may be made to resemble the Hartley oscillator circuit, and the second the Colpitts oscillator circuit. Experiments with ... 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