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Proceedings of the IRE

Issue 2 • Date Feb. 1955

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Displaying Results 1 - 21 of 21
  • Contents

    Publication Year: 1955
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  • Franz Tank Vice-President, 1955

    Publication Year: 1955 , Page(s): 130
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  • Prompt Proceedings

    Publication Year: 1955 , Page(s): 131
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  • The Seventh Plenary Assembly of the International Radio Consultative Committee

    Publication Year: 1955 , Page(s): 132 - 139
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    The Seventh Plenary Assembly of the International Radio Consultative Committee (CCIR) was held in London from September 3 through October 7, 1953. Although many members of the Institute may be unfamiliar with the work of this Committee, it may have far-reaching effects upon the progress of radio. The London meeting approved 165 documents, each of them a possible subject for a technical paper. The purpose of this paper is to give a brief outline of the work accomplished in that assembly and to describe briefly the organization and functions of the CCIR. View full abstract»

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  • The Regenerative Pulse Generator

    Publication Year: 1955 , Page(s): 140 - 148
    Cited by:  Papers (33)  |  Patents (2)
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    This paper describes a new arrangement for generating short pulses. The circuit consists essentially of a loop containing an amplifier, expandor, bandpass filter, a time delay, and a means of automatic gain control. The circuit is controlled to give a round trip gain of unity for the pulse. Under this condition a pulse travels around the loop, alternately being sharpened in the expandor and broadened in the filter. An output tap delivers identical pulses recurring at a rate determined by the loop delay, shape determined principally by the expandor and filter characteristics, and length controlled principally by the filter bandwidth. Pulses modulated in frequency may be obtained by adding a nonlinear phase-frequency characteristic to the loop delay. Microwave radio frequency pulses as short as 0.002 microsecond, and direct current pulses as short as 0.005 microsecond (at half-amplitude) have been produced directly. The principles involved may have application in pulse communication and radar, and have already found use in pulse measurements of broadband circuits. View full abstract»

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  • Correction

    Publication Year: 1955 , Page(s): 148
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  • Electromagnetic Wave Propagation on Helical Structures (A Review and Survey of Recent Progress)

    Publication Year: 1955 , Page(s): 149 - 161
    Cited by:  Papers (53)
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    The progress which has been made in recent years in analyzing and understanding the electromagnetic properties of helical structures is reviewed here. After a brief account of work prior to about 1950, the results obtained from an analysis of the sheath helix model are summarized. The more physically realistic tape helix model and its characteristics-forbidden regions, space harmonics, etc.-are discussed. Recent extensions to the analysis of the sheath helix model including the effect of radially stratified mediums, both isotropic and anisotropic, are noted. Also, additional work using the tape or finite wire helix model is reviewed. Finally, the recent investigations of filter helixes and contrawound helixes are discussed. View full abstract»

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  • Progress in Electron Emission at High Fields

    Publication Year: 1955 , Page(s): 162 - 167
    Cited by:  Papers (2)
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    At high electric fields, electron current densities exceeding 108 acm2 are emitted from metals, the emission process requiring no energy. The present paper discusses properties of such emitters and progress towards stabilizing their electrical performance under useful conditions. View full abstract»

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  • Odd Integer Magnetic Frequency Multipliers

    Publication Year: 1955 , Page(s): 168 - 173
    Cited by:  Papers (5)
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    A mathematical analysis of odd integer frequency multiplication is presented in this paper. Experimental examples of a 300 watt, 400-2,000 cps tripler and a 3 watt, 400-2,000 cps quintupler are discussed. Output wave forms are shown for multipliers employing two types of core materials. The improved circuitry and appropriate selection of magetic materials as employed in today's magnetic frequency multipliers make the generation of power in the 400-2,000 cps range simple and reliable, and such that efficiencies in the order of 80-90 per cent are possible. In addition, the features of space conservation and power economy can be obtained. View full abstract»

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  • Discoidal vs Tubular Feed-through Capacitors

    Publication Year: 1955 , Page(s): 174 - 178
    Cited by:  Papers (1)
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    The coupling impedance and its frequency dependency of tubular and disc-type ceramic feed-through capacitors are investigated theoretically and experimentally. The superiority of discoidal feed-throughs with respect to high-frequency performance and mechanical ruggedness is shown. In the UHF range filtering gains of 20 db to 30 db can be achieved when replacing tubular feed-throughs by discoidal units. Because of this merit, improved shielding methods, which are discussed, are required. View full abstract»

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  • Theory and Design of Wide-Band Multisection Quarter-Wave Transformers

    Publication Year: 1955 , Page(s): 179 - 185
    Cited by:  Papers (55)
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    A general theory of the n-section quarter-wave transformer is presented. It is shown that optimum bandwidth with a minimum pass band tolerance is obtained when the power loss ratio is chosen to give Tchebycheff behavior in the pass band. A comparison is made of the Tchebycheff transformer and the maximally flat transformer, and shows that the former gives a large increase in bandwidth-e.g., up to 44 per cent for a 2-section transformer and up to 75 per cent for a 4-section transformer. Design formulas are given for the 2, 3 and 4-section transformers. View full abstract»

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  • A New High Temperature Silicon Diode

    Publication Year: 1955 , Page(s): 186 - 188
    Cited by:  Papers (2)
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    A method of preparing high back voltage silicon by bombarding the surface with oxygen has been devised and a new type of point contact diode prepared. The diode is characterized by: (1) very low saturation currents of the order of 1 microampere, (2) high inverse operating voltages (70-200v), (3) very low barrier capacitance (<0.3 ¿¿f) and rapid recovery times, and (4) operation at elevated temperatures up to 200 degrees C. View full abstract»

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  • IRE Standards on Radio Aids to Navigation: Definitions of Terms, 1954

    Publication Year: 1955 , Page(s): 189 - 209
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  • A Coupled Mode Description of Beam-Type Amplifiers

    Publication Year: 1955 , Page(s): 210 - 217
    Cited by:  Papers (4)
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    A description of beam-type amplifiers, in particular the klystron and traveling-wave tube, is developed in which the electroh stream and the circuit are treated as coupled transmission lines. The method allows the derivation of expressions for the ac power flow in both the beam and the circuit. The power flow relations are presented for the klystron and the traveling-wave tube. View full abstract»

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  • Investigations of Noise in Audio Frequency Amplifiers Using Junction Transistors

    Publication Year: 1955 , Page(s): 217 - 226
    Cited by:  Papers (3)
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    An investigation of noise from modem junction transistors in audio frequency amplifiers is presented. Different circuit configurations are examined and the effects on noise factor of the input termination and operating point are discussed. At least three distinct sources of noise corresponding to different physical phenomena contributing to total noise are identified. In modem junction transistors shot noise and thermal noise set the ultimate limit of noise in transistor amplifiers, and are frequency-independent over the audio spectrum. Semiconductor noise which follows approximately the 1/f law has been found to be just one contributor to total transistor noise. The concept of equivalent input noise resistance is applied to transistor circuits and a comparison is drawn between noise of transistor and vacuum-tube amplifiers. View full abstract»

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  • Correspondence

    Publication Year: 1955 , Page(s): 227 - 230
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  • Contributors

    Publication Year: 1955 , Page(s): 231 - 232
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  • IRE news and radio notes

    Publication Year: 1955 , Page(s): 233 - 234
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  • Books

    Publication Year: 1955 , Page(s): 235 - 238
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  • Abstracts of Transactions of the I.R.E.

    Publication Year: 1955 , Page(s): 238 - 241
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    The issues of IRE Transactions listed herein have recently been published, and are now available from the Institute of Radio Engineers, Inc. The contents of each issue and, where available, abstracts of technical papers are given. View full abstract»

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  • Abstracts and references

    Publication Year: 1955 , Page(s): 242 - 256
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Aims & Scope

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

Full Aims & Scope