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Proceedings of the IRE

Issue 11 • Date Nov. 1947

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Displaying Results 1 - 25 of 42
  • Table of contents

    Publication Year: 1947, Page(s):1177 - 1178
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  • Raymond A. Heising, Board of Directors-1947

    Publication Year: 1947, Page(s): 1179
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  • What's in a Technical Name?

    Publication Year: 1947, Page(s): 1180
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    First Page of the Article
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  • Microwave Converters

    Publication Year: 1947, Page(s):1181 - 1191
    Cited by:  Papers (6)
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    Microwave converters using point-contact silicon rectifiers as the nonlinear element are discussed, with particular emphasis on the design of the networks connecting the rectifier to the input and output terminals. Several converters which have been developed during recent years for use at wavelengths between 1 and 30 centimeters are described, and some of the effects of the impedance-versus-frequ... View full abstract»

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  • Fluctuation Noise in Pulse-Height Multiplex Radio Links

    Publication Year: 1947, Page(s):1192 - 1197
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    The choice of a method of multiplex synthesis and analysis will depend on (1) the distortion and noise characteristics of the link connecting the synthesizer and analyzer, and (2) the type of intelligence and tolerable distortion and noise in each channel. Among the various methods of multiplexing adaptable to transmission over radio links is the pulse-height or commutation method. The question of... View full abstract»

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  • Propagation of Radio Waves in the Lower Troposphere

    Publication Year: 1947, Page(s):1198 - 1202
    Cited by:  Papers (7)
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    The effect of tropospheric layers on the propagation of high-frequency radio waves has been experimentally investigated. A theory is proposed which is in agreement with the salient propagation characteristics observed on a nonoptical link. Fields beyond the optical horizon are governed by the layer height and the refractive index change through the layer. For low layers the higher frequencies have... View full abstract»

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  • The Determination of Ionospheric Electron Distribution

    Publication Year: 1947, Page(s):1203 - 1207
    Cited by:  Papers (4)
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    The virtual height versus frequency integral is derived, neglecting absorption and the earth's magnetic field. It is shown how solution of this integral equation can be obtained using the Laplace transformation, and how true height versus frequency can be determined graphically from virtual height versus frequency curves. Application of the method is made to some typical nighttime and daytime iono... View full abstract»

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  • Considerations in the Design of a Radar Intermediate-Frequency Amplifier

    Publication Year: 1947, Page(s):1208 - 1219
    Cited by:  Papers (1)
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    The intermediate-frequency amplifier of a microwave radar receiver is commonly required to provide approximately 100 decibels amplification in a bandwidth of 1 to 10 megacycles, centered at frequencies in the 30- and 60-megacycle regions. Meeting such requirements involves the use of five to ten amplifier stages of the highest efficiency that can be suited to production methods. In addition, the n... View full abstract»

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  • Detectability and Discriminability of Targets on a Remote Projection Plan-Position Indicator

    Publication Year: 1947, Page(s):1220 - 1225
    Cited by:  Papers (1)
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    Quantitative results were obtained on minimum detectable signals and minimum separation between two targets as a function of the following variable factors: video gain, c.r.t. bias, signal clipping, light-source intensity, type of diffraction screen, and position of the operator. The projection (PPI), using a dark-trace tube, appeared to be 1 db worse than a standard 5-inch PPI, when each instrume... View full abstract»

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  • Testing Repeaters with Circulated Pulses

    Publication Year: 1947, Page(s):1226 - 1235
    Cited by:  Papers (1)
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    An extension of square-wave and pulse-testing techniques is described which permits the signal pulse to be observed after circulating many times through the transmission system under test. This method is particularly useful for measuring the cumulative effect of a number of similar units, such as those used in carrier or microwave-radio-repeater systems, when only one unit is available. Applicatio... View full abstract»

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  • A Method of Virtual Displacements for Electrical Systems with Applications to Pulse Transformers

    Publication Year: 1947, Page(s):1236 - 1247
    Cited by:  Papers (1)
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    A method of virtual displacements is developed for obtaining the transient behavior of electrical systems with distributed constants. This method involves the association of a number of assumed "current modes" with generalized co-ordinates, and gives a set of equations which duplicates the mesh equations of a corresponding equivalent lumped network. The procedure developed is applicable to many di... View full abstract»

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  • Transadmittance and Input Conductance of a Lighthouse Triode at 3000 Megacycles

    Publication Year: 1947, Page(s):1248 - 1251
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    Measurement of the transadmittance and input conductance of a lighthouse triode at 3000 Mc. as a function of the cathode-to-grid transit angle θ1are described, and results are given. These measurements indicate that, for small values of θ1(that is, for close spacings and high current densities), transadmittances of 50 to 70 per cent of the low-frequency values can b... View full abstract»

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  • The Cyclophon: A Multipurpose Electronic Commutator Tube

    Publication Year: 1947, Page(s):1251 - 1257
    Cited by:  Papers (6)
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    Electronic switching or commutation provides an inertialess mechanism for precise high-speed operation, and permits a multiplicity of circuits to be controlled by relatively small voltages such as are encountered in radio reception. The Cyclophon tube is one particular form of electronic switch which provides for the control of twenty-five separate circuits. This control is so precise that it can ... View full abstract»

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  • Video Storage by Secondary Emission from Simple Mosaics

    Publication Year: 1947, Page(s):1258 - 1264
    Cited by:  Papers (3)
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    It has been found that the derivation of a video signal in an iconoscope by scanning does not involve bringing each element of the mosaic into an electron-exchange equilibrium while under the beam. Consequently, the mosaic charge is erased, not at the instant of passage of the beam, but continuously by the rain of low-velocity electrons. An output-signal attenuation of less than 1 per cent per sca... View full abstract»

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  • Space-Charge and Transit-Time Effects on Signal and Noise in Microwave Tetrodes

    Publication Year: 1947, Page(s):1264 - 1272
    Cited by:  Papers (9)
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    Signal and noise in microwave tetrodes are discussed with particular emphasis on their behavior as space-charge conditions are varied in the grid-screen, or drift, region. The analysis assumes that the electron-stream velocity is single-valued. For particular conditions the noise figure may be substantially improved by increasing the space-charge density in the grid-screen region until an entering... View full abstract»

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  • The Motion of Electrons Subject to Forces Transverse to a Uniform Magnetic Field

    Publication Year: 1947, Page(s):1273 - 1279
    Cited by:  Papers (1)
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    The paths of electrons in a uniform magnetic field, under the influence of forces transverse to the magnetic field, are of interest in a variety of vacuum tubes. In general, the force experienced by the electron varies with time. The time variation may arise from motion of the electron through an electrostatic field, from motion of the electron along the lines of a curved magnetic field (inertial ... View full abstract»

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  • An Oscillographic Method of Presenting Impedances on the Reflection-Coefficient Plane

    Publication Year: 1947, Page(s):1279 - 1283
    Cited by:  Papers (26)
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    A method is described which permits the direct presentation of the reflection-coefficient plane on an oscillograph. The theory is briefly outlined and photographs reproduced showing one simple form of equipment and the results which it yields. Mention is made of more elaborate arrangements which increase the accuracy of the method. View full abstract»

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  • Parabolic-Antenna Design for Microwaves

    Publication Year: 1947, Page(s):1284 - 1294
    Cited by:  Papers (27)  |  Patents (5)
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    This paper is intended to give fundamental relations and design criteria for parabolic radiators at microwave frequencies (i.e., wavelengths between 1 and 10 centimeters). The frst part of the paper discusses the properties of the parabola which make it useful as a directional antenna, and the relation of phase polarization and amplitude of primary illumination to the over-all radiation characteri... View full abstract»

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  • Hybrid Circuits for Microwaves

    Publication Year: 1947, Page(s):1294 - 1306
    Cited by:  Papers (46)
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    The fundamental behavior of hybrid circuits is reviewed and discussed, largely in terms of reciprocity relationships. The phase properties of simple wave-guide tee junctions are briefly considered. Two linds of hybrid circuits are then described, the one involving a ring or loop of transmission line, the other relying upon the symmetry properties of certain four-arm junctions. The description is c... View full abstract»

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  • A Mathematical Theory of Directional Couplers

    Publication Year: 1947, Page(s):1307 - 1313
    Cited by:  Papers (21)
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    Directional couplers are becoming an increasingly important component in microwave radio-frequency circuits. By the suitable generalization of concepts used in discussing the lumped loading of a single transmission line, it is possible to discuss the interaction of the coupling elements of these more complicated circuits in a reasonably complete and elementary manner. Input impedances are analyzed... View full abstract»

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  • The Equivalent Circuit of a Corner Bend in a Rectangular Wave Guide

    Publication Year: 1947, Page(s):1313 - 1317
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    Following the fundamentals set down in an earlier paper, the impedance representation of a right-angle bend in a rectangular wave guide is calculated. Two types of bends are considered, being defined by the polarization of the electric field relative to the plane of the bend. The results are stated in the form of infinite series. Numerical results are given View full abstract»

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  • Microwave Filters Using Quarter-Wave Couplings

    Publication Year: 1947, Page(s):1318 - 1323
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1256 KB)

    This paper presents a method of designing bandpass and band-rejection microwave filters by appropriately transforming lumped-element filters. Such microwave filters are realized physically as chains of resonant elements (either cavities or irises), coupled by quarter-wave sections of line. A structure of this type has a number of practical advantages over other types of filter structures, such as ... View full abstract»

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  • Broad-Band Noncontacting Short Circuits for Coaxial Lines: Part III-Control of Parasitic Resonances in the S-Type Plunger

    Publication Year: 1947, Page(s):1324 - 1328
    Cited by:  Papers (1)
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    It is known that parasitic resonances may occur in the noncontacting plunger of a coaxial-line resonator, when the wavelength is less than the circumference of the outer gap. When it is not possible to select inner and outer diameters such that the parasitic resonances occur at wavelengths outside of the tuning range, these resonances must be controlled by cutting grooves or slots in the plunger. ... View full abstract»

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

    Publication Year: 1947, Page(s):1328 - 1333
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  • Correspondence

    Publication Year: 1947, Page(s):1333 - 1335
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Aims & Scope

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

Full Aims & Scope