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Proceedings of the IRE

Issue 3 • March 1950

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Displaying Results 1 - 25 of 27
  • Table of contents

    Publication Year: 1950, Page(s): 225
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  • Austin V. Eastman, Regional Director, 1950-1951

    Publication Year: 1950, Page(s): 226
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  • The Engineer as Government Advisor

    Publication Year: 1950, Page(s): 227
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    First Page of the Article
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  • Suggestions for the Preparation of Technical Papers

    Publication Year: 1950, Page(s):228 - 233
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    The value and purpose of technical papers is presented, followed by generalized suggestions for their preparation. Separate sections deal with the introduction, main body, and conclusion. Throughout is interspersed information on illustrations, value of good logic and grammatical correctness, along with other data for the writing of a paper from its conception through ultimate delivery and publica... View full abstract»

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  • Some Problems of Disk Recording for Broadcasting Purposes

    Publication Year: 1950, Page(s):233 - 238
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1672 KB)

    The first part of the paper outlines briefly the advantages of disk as compared with other systems of recording. Groove spacing, groove velocity, and direction of cut as applied to 16-inch disks are discussed, and a conclusion is reached regarding the best compromise which can be used. Recording characteristics are considered in detail and a characteristic is recommended which could be used genera... View full abstract»

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  • A Variable Speed Turntable and Its Use in the Calibration of Disk Reproducing Pickups

    Publication Year: 1950, Page(s):239 - 243
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2024 KB)

    The frequency response of a disk reproducing pickup, when measured by means of a conventional variable-frequency test disk is a function of the dimensional and physical properties of the disk, as well as of the pickup itself. This is because the effects of elastic deformation of the record material and of finite stylus tip size vary with the physical wavelength of the undulations of the recorded g... View full abstract»

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  • A New Type of Slotted Line Section

    Publication Year: 1950, Page(s):244 - 248
    Cited by:  Papers (15)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1656 KB)

    Conventional slotted lines require very close machining tolerances and care in construction if accurate measurements of VSWR (voltage standing-wave ratio) are to be obtained. A much less critical slotted line may be obtained by use of the transformation w=tan z. The concentric line is converted to two parallel semiinfinite planes with a slightly elliptical center conductor. Simple modifications of... View full abstract»

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  • The Radiation Characteristics of Conical Horn Antennas

    Publication Year: 1950, Page(s):249 - 251
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (576 KB)

    This paper reports the measured radiation characteristics of conical horns employing waveguide excitation. The experimentally derived gains are in excellent agreement with the theoretical results (unpublished) obtained by Gray and Schelkunoff. The gain and effective area is given for conical horns of arbitrary proportions and the radiation patterns are included for horns of optimum design. All dim... View full abstract»

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  • Interference Characteristics of Pulse-Time Modulation

    Publication Year: 1950, Page(s):252 - 255
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1072 KB)

    The interference characteristics of pulse-time modulation are analyzed mathematically and experimentally; particular forms examined are pulse-duration and pulse-position modulation. Both two-station and two-path interference are considered. Two-station interference is found to be characterized by virtually complete predominance of the stronger signal, and by noise of random character. Two-path int... View full abstract»

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  • Echoes in Transmission at 450 Megacycles from Land-to-Car Radio Units

    Publication Year: 1950, Page(s):255 - 258
    Cited by:  Papers (31)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (904 KB)

    By the use of short pulses of 450-megacycle carrier, the echoes which appear in transmitting from a land station to a moving car in New York City have been investigated. The results show the multiple-path nature of transmission. Sample pictures of the received pulses are given, and, in addition, a statistical analysis of the multiple-path situation is presented. These results are of use in conside... View full abstract»

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  • A General Review of Linear Varying Parameter and Nonlinear Circuit Analysis

    Publication Year: 1950, Page(s):259 - 263
    Cited by:  Papers (9)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1432 KB)

    Variable and nonlinear systems are classified from the standpoint of their significance in communication problems. Methods of solution are reviewed and appropriate references are cited. The paper is a synopsis of a talk given at the Symposium on Network Theory of the 1949 National IRE Convention. View full abstract»

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  • The Synthesis of Resistor-Capacitor Networks

    Publication Year: 1950, Page(s):263 - 269
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1328 KB)

    This paper develops a general method of synthesis of a prescribed ratio of output-to-input voltage in the form of a resistor-capacitor lattice. The method is described for both the cases where the output terminals are unloaded and where a resistor-capacitor load is specified. The methods of transformation of the lattice to unbalanced structure are outlined. Illustrative examples are given for each... View full abstract»

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  • Theoretical Aspects of Asynchronous Multiplexing

    Publication Year: 1950, Page(s):270 - 275
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1288 KB)

    Various forms of multiplexing, in which information from several sources is systematically combined and transmitted over a single channel, have been described in the literature. Recent advances in communication theory make possible an examination of the case where isolated transmitters share a common channel without synchronization. This case is important in applications where the transmitters are... View full abstract»

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  • Methods for Obtaining the Voltage Standing-Wave Ratio on Transmission Lines Independently of the Detector Characteristics

    Publication Year: 1950, Page(s):275 - 279
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (752 KB)

    In the measurement of impedance at ultra-high frequencies by means of detecting standing waves on transmission lines, it is necessary to know the response law of the detector. This usually involves either a calibration of the detector or an assumption as to its characteristics. By means of the basic transmission line equations and the general law of detection, expressions are derived which give th... View full abstract»

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  • Shunt-Excited Flat-Plate Antennas with Applications to Aircraft Structures

    Publication Year: 1950, Page(s):280 - 287
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1648 KB)

    A shunt-excited flat-plate antenna is a structure comprised of a thin rectangular plate and a shunt-feeding circuit formed by a wire lying in the plane of the plate parallel and close to one of its long edges, the extremities of the wire being electrically bonded to the plate, and the wire broken at its center to provide driving terminals. In this paper, the electrical characteristics of this stru... View full abstract»

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  • Volume Scanning with Conical Beams

    Publication Year: 1950, Page(s):287 - 290
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    The equations of motion for a radar scan that provides a nearly constant number of pulses to all point targets are derived. In addition, the periods for this scan and for the more conventional one having constant angular velocities are presented. For these types of scanners it is found that the optimum cross-over point between adjacent beams is at the 2.1-db point of the antenna pattern. View full abstract»

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  • Frequency Analysis of Variable Networks

    Publication Year: 1950, Page(s):291 - 299
    Cited by:  Papers (207)
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    This paper describes an approach to the analysis of linear variable networks which is essentially an extension of the frequency analysis techniques commonly used in connection with fixed networks. It is shown that a function H(jω; t), termed the system function of a variable network, possesses most of the fundamental properties of the system function of a fixed network. Thus, once H(jω; ... View full abstract»

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  • Input Impedance of a Two-Wire Open-Line and Cylindrical-Center Driven Antenna

    Publication Year: 1950, Page(s):299 - 300
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    Using the potential theory, a method of analysis of the input impedance of a transmission line terminated by a cylindrical antenna is described. The results of application of this method to a particular configuration of line and antenna are presented. View full abstract»

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  • Reflection of Radio Waves from a Rough Sea

    Publication Year: 1950, Page(s):301 - 304
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1192 KB)

    At microwave frequencies, the sea cannot always be assumed to be a smooth, or mirror-like, reflecting surface. It is shown that when the sea is rough the reflected field will be a randomly fluctuating one, or will at least have a fluctuating component, even though the radiated signal is of constant amplitude and frequency. The central limit theorem of mathematical probability theory is used to der... View full abstract»

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  • Correction [to "Fluctuation phenomena arising in the quantum interaction of electrons with high-frequency fields," ibid., Dec 1949, pp 1424-1427]

    Publication Year: 1950, Page(s): 304
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (215 KB)

    The authors of the paper "Fluctuation phenomena arising in the quantum interaction of electrons with high-frequency fields," which appeared on pages 1424-1427, of the December, 1949, issue of the Proceedings of the IRE, have brought corrections to equations (9a) and (lOa) on page 1426 to the attention of the editors. View full abstract»

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  • A Note on Coaxial Bethe-Hole Directional Couplers

    Publication Year: 1950, Page(s):305 - 309
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1760 KB)

    The coaxial directional coupler of the Bethe-Hole type consists of two coaxial transmission lines crossed at an angle of 60° and coupled by a single circular hole. It has been previously shown that this device should have perfect directivity at any wavelength, provided that (a) the diameter of the coupling hole is small compared with λ/8, (b) the thickness of the hole is infinitesimal, a... View full abstract»

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  • Admittance and Transfer Function for an n-Mesh RC Filter Network

    Publication Year: 1950, Page(s):309 - 310
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    The exact evaluation of the coefficients in the admittance and transfer functions of an n-mesh low-pass filter are given as functions of n. It is shown by induction that if these coefficients are true for n, then they also are true for n+1. In particular, they are shown to be true for n=1. View full abstract»

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

    Publication Year: 1950, Page(s):311 - 314
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    Freely Available from IEEE
  • Correspondence

    Publication Year: 1950, Page(s): 314
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  • Institute news and radio notes

    Publication Year: 1950, Page(s):315 - 322
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Aims & Scope

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

Full Aims & Scope