Proceedings of the IRE

Issue 11 • Nov. 1948

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Displaying Results 1 - 25 of 28
  • Table of contents

    Publication Year: 1948, Page(s): 1321
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  • Theodore A. Hunter, Director, 1948-1949

    Publication Year: 1948, Page(s): 1322
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  • Electronics in Industry

    Publication Year: 1948, Page(s): 1323
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

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  • The Philosophy of PCM

    Publication Year: 1948, Page(s):1324 - 1331
    Cited by:  Papers (149)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1537 KB)

    Recent papers describe experiments in transmitting speech by PCM (pulse code modulation). This paper shows in a general way some of the advantages of PCM, and distinguishes between what can be achieved with PCM and with other broadband systems, such as large-index FM. The intent is to explain the various points simply, rather than to elaborate them in detail. The paper is for those who want to fin... View full abstract»

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  • Pentriode Amplifiers

    Publication Year: 1948, Page(s):1332 - 1338
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1376 KB)

    Conventional video-amplifier design is complicated by low-frequency phase shift and degenerative decrease in gain caused by inefficient screen-grid and cathode by-pass circuits. This paper describes two amplifier circuits in which phase shift and degeneration in those by-pass circuits may be eliminated throughout the entire range to zero frequency. Small paper or mica capacitors may be substituted... View full abstract»

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  • Isotopes and Nuclear Structure

    Publication Year: 1948, Page(s):1339 - 1348
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  • Duplex Tetrode UHF Power Tubes

    Publication Year: 1948, Page(s):1348 - 1353
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3144 KB)

    Major factors affecting the design and development of wide-band uhf power tubes are considered and emphasis is given to the television application. A qualitative discussion of methods for obtaining the required performance is presented, and a 5-kw 300-Mc liquid-cooled, intemally neutralized duplex tetrode is described. View full abstract»

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  • Electrostatically Focused Radial-Beam Tube

    Publication Year: 1948, Page(s):1354 - 1357
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1504 KB)

    The addition of the electrostatic field between coaxial cylinders to a uniform electrostatic field provides the correct properties for focusing a beam of electrons in the positive direction of the uniform field. In the electrostatically focused radial-beam tube, this combination of fields produces a single radial electron beam which may be rotated by rotating the uniform component of the combined ... View full abstract»

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  • High-Power Interdigital Magnetrons

    Publication Year: 1948, Page(s):1357 - 1363
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2008 KB)

    This paper deals with the pill-box-cavity interdigital magnetrons operating in the cavity mode. An analysis of the cathode coupling problem indicates the desirability of cathode decoupling chokes presenting a capacitive impedance to the cathode-anode space. Cold tests and operating tests have confirmed this analysis. The high efficiency to be expected from operation in this mode has been realized,... View full abstract»

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  • Correction [to "Antenna Design for Television and FM Reception,' by F.A. Kolster, ibid., 1242-1248, Oct. 1948]

    Publication Year: 1948, Page(s): 1363
    Cited by:  Papers (1)
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  • Theory of Models of Electromagnetic Systems

    Publication Year: 1948, Page(s):1364 - 1370
    Cited by:  Papers (62)  |  Patents (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1208 KB)

    Most model measurements are made on models which simulate only the geometrical configurations of the lines of force in the fields of the full-scale system, and thus yield only relative results for many of the properties of the system. It is possible, however, to devise models in which the measurements are on a quantitative or absolute basis in terms of the full-scale system. The conditions to be s... View full abstract»

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  • High-Frequency Polyphase Transmission Line

    Publication Year: 1948, Page(s):1370 - 1375
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (920 KB)

    The problems of the polyphase transmission line and the single-phase multiwire line have been formulated, based upon the vector-potential method. The transmission-line equations that determine the current and voltage relationships on these lines have been derived and solved. Formulas for the characteristic impedance of the lines have been thus obtained. They are useful in designing lines to feed p... View full abstract»

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  • Low-Pass Filters Using Coaxial Transmission Lines as Elements

    Publication Year: 1948, Page(s):1376 - 1383
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4296 KB)

    Transmission-line low-pass filter design is in large measure dependent upon the frequency band in which the filter is to be used. Certain approximations may be made at comparatively low frequencies which simplify the problem, refinements in the analysis having to be introduced as the filter pass band is extended to higher and higher frequencies. Four transmission-line low-pass filter designs are p... View full abstract»

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  • Parabolic Loci for Two Tuned Coupled Circuits

    Publication Year: 1948, Page(s):1384 - 1388
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1504 KB)

    It is pointed out that the reciprocal of the system-response function E1/E2,or its equivalent, of conventional two-mesh tuned coupled circuits when plotted in the complex plane leads to parabolic loci under certain restrictions. The simple geometric properties of parabolas will facilitate the design work and may throw lights as to the applications and limitations of the coupl... View full abstract»

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

    Publication Year: 1948, Page(s):1388 - 1389
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  • Correspondence

    Publication Year: 1948, Page(s): 1390
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  • Institute news and radio notes

    Publication Year: 1948, Page(s):1391 - 1394
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  • Books

    Publication Year: 1948, Page(s):1394 - 1397
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  • IRE People

    Publication Year: 1948, Page(s):1398 - 1400
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  • W. Ryland Hill, Jr. Chairman, Seattle Section, 1948-1949 and Andrew Friedenthal, Chairman, Detroit Section, 1948-1949

    Publication Year: 1948, Page(s): 1401
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  • Technical Problems of Military Radio Communications of the Future

    Publication Year: 1948, Page(s):1402 - 1403
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (600 KB)

    The success of military operations in the future will depend greatly upon the availability of a communication system of adequate mobility, traffic capacity, and reliability. An analysis of the factors which prohibit the realization of such a system at the present time shows the need for research in all phases of radio communication. A number of the more pressing limitations of existing techniques ... View full abstract»

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  • Telemetering Guided-Missile Performance

    Publication Year: 1948, Page(s):1404 - 1414
    Cited by:  Papers (2)
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  • A Waveguide Bridge for Measuring Gain at 4000 Mc

    Publication Year: 1948, Page(s):1414 - 1418
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    A bridge has been constructed for measuring the gain and phase delay of amplifiers in the vicinity of 4000 Mc. The equipment is described, and the methods employed to reduce the possible errors are discussed. The general method may be adapted for use in any desired frequency range. View full abstract»

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  • A High-Level Single-Sideband Transmitter

    Publication Year: 1948, Page(s):1419 - 1425
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3088 KB)

    Double-sideband suppressed-carrier signals can be generated with relatively high efficiency at high power levels in grid-modulated balanced modulators so biased that very little plate current flows in the absence of audio input. When tubes having a constant-current characteristic are used, and the necessary quadrature phase shift between pairs of audio- and radio-frequency excitation voltages exis... View full abstract»

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  • An Antenna for Controlling the Nonfading Range of Broadcasting Stations

    Publication Year: 1948, Page(s):1426 - 1431
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2056 KB)

    A new type of broadcast antenna is described which radiates very little energy over a wide, high angle. The angle above which minimum energy is radiated can be varied electrically from 40° to 60°, thus permitting the fading wall to be adjusted for maximum primary service. The electrical height of the antenna is dependent upon the specific vertical pattern desired but is approximately 300... 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