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Aeronautical and Navigational Electronics, IRE Transactions on

Issue 4 • Date Dec. 1955

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Displaying Results 1 - 13 of 13
  • [Front cover]

    Page(s): c1
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    Freely Available from IEEE
  • Table of contents

    Page(s): 1
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    Freely Available from IEEE
  • Chairman's Report

    Page(s): 2
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    Freely Available from IEEE
  • ADF

    Page(s): 3
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    Freely Available from IEEE
  • The Automatic Radio Direction Finder

    Page(s): 4 - 11
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    The convenience, ease of operation and inherent reasonableness of a direction finding system which culminates in a simple needle pointing to the selected radio station must make it seem to the late-comer that things were always thus in the plane's front office. Not so. Much anguish was experienced, many brains overtaxed, and considerable ingenuity exercised to place this apparently simple device in the hands of the pilot. It will be the purpose of this paper to give the history of the development of the Automatic Direction Finder, to give a condensed explanation of its mode of operation, and to describe its use in the navigation of aircraft. View full abstract»

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  • Airline Requirements for Airborne Automatic Direction Finders and the Program of Equipment Development

    Page(s): 12 - 17
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    The convenience, ease of operation and inherent reasonableness of a direction finding system which culminates in a simple needle pointing to the selected radio station must make it seem to the late-comer that things were always thus in the plane's front office. Not so. Much anguish was experienced, many brains overtaxed, and considerable ingenuity exercised to place this apparently simple device in the hands of the pilot. It will be the purpose of this paper to give the history of the development of the Automatic Direction Finder, to give a condensed explanation of its mode of operation, and to describe its use in the navigation of aircraft. View full abstract»

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  • A Magnetic Radio Compass Antenna Having Zero Drag

    Page(s): 17 - 22
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    The use of high speed aircraft has accentuated the requirements for low drag antennas and has made the precipitation static problem much more severe. A radically new loop design using ferrite materials makes it possible to exceed the performance of the present external loop antenna in a submerged magnetic antenna that has zero drag. Among its important characteristics are lower weight, less mechanism, and rejection of precipitation static interference as well as reduction of the drag to zero. The antenna consists of a small ferrite-core goniometer with four radial collector bars of the same material. The design includes a novel quadrantal error compensating scheme in which the loop is compensated by attaching selected end pieces to the collector bars. View full abstract»

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  • ADF Sense Antenna Requirements and Design

    Page(s): 23 - 30
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1763 KB)  

    The use of high speed aircraft has accentuated the requirements for low drag antennas and has made the precipitation static problem much more severe. A radically new loop design using ferrite materials makes it possible to exceed the performance of the present external loop antenna in a submerged magnetic antenna that has zero drag. Among its important characteristics are lower weight, less mechanism, and rejection of precipitation static interference as well as reduction of the drag to zero. The antenna consists of a small ferrite-core goniometer with four radial collector bars of the same material. The design includes a novel quadrantal error compensating scheme in which the loop is compensated by attaching selected end pieces to the collector bars. View full abstract»

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  • Analysis of the Over-Station Behavior of Aircraft Low Frequency ADF Systems

    Page(s): 31 - 41
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    A theoretical investigation has been made of the behavior of low-frequency automatic direction finder systems in aircraft on courses near and over the radio station. This behavior is explained in the light of electromagnetic field theory and the equipment characteristics. An equation is derived for the locus of all points where the ADF indicator will start to reverse due to sense-antenna signal phase shift with respect to the loop-antenna signal as the station axis is approached and passed. The equation contains six geometrical and electrical variables. The locus thus defined is similar to a cone or paraboloid, apex down, with the apex located at the radio station in most cases. The equation predicts that for a phase advance of the loop signal, relative to the sense-antenna signal, of slightly more than the 90° value applied by the basic ideal receiver, the apex of the cone-like space figure locus rises off the ground, and that it would be possible to fly under this apex, producing but one reversal of ADF indicator needle with this single reversal starting exactly over the radio station. The altitude of this apex is a relatively simple function of the variables. The results of the flight tests verifying the theoretical findings are given together with some requisites for the use of the findings to eliminate the effects due to improper sense antenna location, provided the location error is not too extreme. View full abstract»

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  • The Marconi AD. 7092 Series of ADF Receivers

    Page(s): 42 - 46
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    This paper traces briefly the history of the development of the AD.7092 series of automatic radio direction finders and describes the special features of the AD.7092C which was designed to suit the requirements of North American operators. Novel features include an electrical remote control system and a tuned remote sense amplifier which permits the use of long feeders using small sense antennas. The suppressed loop antenna and method of error compensation are described and the trend of future ADF developments in Great Britain is indicated. View full abstract»

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  • Contributors

    Page(s): 47
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    Freely Available from IEEE
  • PGANE News

    Page(s): 47
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    Freely Available from IEEE
  • [Front cover]

    Page(s): c2
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Aims & Scope

This Transactions ceased publication in 1960. The new retitled publication is IEEE Transactions on Aerospace and Electronic Systems.

Full Aims & Scope