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Electrical Engineers - Part IIIA: Radiolocation, Journal of the Institution of

Issue 10 • Date 1946

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Displaying Results 1 - 18 of 18
  • Measurement of galactic noise at 60 Mc/s

    Publication Year: 1946, Page(s):1487 - 1489
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (423 KB)

    Measurements have been made of the extra-terrestrial noise picked up by an aerial on different bearings at different times of the day. This noise is expressed quantitatively by the equivalent temperature of the aerial radiation resistance. Temperatures between 1 800 and 10 000° K have been observed. View full abstract»

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  • Experiments with Yagi aerials at 600 Mc/s

    Publication Year: 1946, Page(s):1490 - 1496
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1112 KB)

    An account is given of experiments leading to the design of 600-Mc/s radar aerials of Yagi type, suitable for mounting on naval gun-control directors. The basic array finally adopted had eight director rods, and a semi-circular cylindrical sheet reflector. Two such arrays, one for transmission and one for reception, were mounted with a separation of 1¿ wavelengths on pom-pom directors; numbers of... View full abstract»

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  • Some recent developments in the design of centimetric aerial systems

    Publication Year: 1946, Page(s):1497 - 1510
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1819 KB)

    The development of microwave radar systems was started in 1940 largely because microwave aerial systems offered, particularly for airborne use, the definite advantages of narrow beams and high power-gains from practical aerial apertures. The principle was well known that to achieve these things it is necessary to spread out the power being radiated over as large an aperture as possible. One of the... View full abstract»

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  • The practical aspects of paraboloid aerial design

    Publication Year: 1946, Page(s):1511 - 1522
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1608 KB)

    The paper gives a short account of the technique of designing paraboloid and other forms of point-fed double-curvature aerials. The general properties of such aerials with their advantages and limitations are described; the requirements for the feed are discussed, and illustrated by reference to all the main types of feed that have been used. Some purely practical points such as reflector toleranc... View full abstract»

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  • Surface impedance of an infinite parallel-wire grid at oblique angles of incidence

    Publication Year: 1946, Page(s):1523 - 1527
    Cited by:  Papers (22)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (478 KB)

    A study is made of the scattering of a plane wave incident obliquely upon an infinite plane grid of parallel equidistant circular wires. A simple means is described of picturing the mechanism by which side waves are produced as the angle of incidence is varied. Exact formulae and curves for the shunt reactance of the grid are given for the most useful case in which the spacing is less than a wavel... View full abstract»

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  • The effect of flanges on the radiation patterns of small horns

    Publication Year: 1946, Page(s):1528 - 1530
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (396 KB)

    This paper describes the results of experiments carried out on horns having rectangular apertures one dimension of which is of the order of a quarter of a wavelength, the other being of the order of one wavelength or more. The polarization is parallel to the smaller dimension. The paper considers the radiation pattern in a plane normal to the aperture of the horn and perpendicular to the longer si... View full abstract»

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  • The elimination of standing waves in aerials employing paraboloidal reflectors

    Publication Year: 1946, Page(s):1531 - 1535
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (637 KB)

    The standing waves produced in a matched wave guide when it is placed at the focus of a paraboloid are analysed along the lines of classical diffraction theory. From the theory it is possible to deduce the size of a flat plate which, when fixed to the apex of the paraboloid, eliminates this source of reflection. The experimental results obtained with a paraboloid of aperture 20¿ are in good agree... View full abstract»

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  • The hoghorn—an electromagnetic horn radiator of medium-sized aperture

    Publication Year: 1946, Page(s):1536 - 1538
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (252 KB)

    First Page of the Article
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  • Experiments with slot aerials in corner reflectors

    Publication Year: 1946, Page(s):1539 - 1547
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1143 KB)

    This series of experiments measures the radiation patterns of slot aerials associated with corner reflectors. The performances of slots in the faces of the corner reflectors and of slots in cavities in front of the reflectors are described. All the slots are cavity-fed. The effects on radiation patterns of variations in the corner angle and of displacements of a slotted cavity in front of the corn... View full abstract»

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  • On the theoretical functioning of some types of centimetric linear arrays

    Publication Year: 1946, Page(s):1548 - 1553
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (779 KB)

    The functioning of linear arrays is explained in terms of familiar filter theory. Three basic types of array are considered, particular attention being paid to the non-resonant array, and the theory of each is investigated, first of all for an array consisting of radiators free from mutual interaction and then for a more general case. It is shown that the non-resonant array has a wide frequency ba... View full abstract»

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  • A method of calculating the field over a plane aperture required to produce a given polar diagram

    Publication Year: 1946, Page(s):1554 - 1558
    Cited by:  Papers (45)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (661 KB)

    A summation method, especially adapted for numerical computation, is evolved for finding the magnitude and phase of the field distribution over a plane aperture which will yield an approximation to a specified polar diagram on one side of the aperture plane. The method is illustrated with a detailed example. A concise statement of numerical procedure is given. View full abstract»

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  • The visibility of signals on radar range presentations

    Publication Year: 1946, Page(s):1559 - 1563
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (681 KB)

    An investigation has been made of the dependence of the minimum detectable signal on a radar range presentation, on parameters of the equipment. Brightness, size of deflection pattern, and the distance of the observer from the screen caused little or no variation in signal visibility over ranges of practical values. A horizontal time base was found to be significantly better than a vertical time b... View full abstract»

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  • Iron-cored deflecting coils for cathode-ray tubes

    Publication Year: 1946, Page(s):1564 - 1574
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1647 KB)

    A concise theory of the magnetic circuits of deflecting coils with iron cores is given, and experimental results with various types of single-field and crossed-field coils are described. The properties of sensitivity, inductance, resistance, defocusing and distortions are considered, particular attention being paid to coils with slotted cores. View full abstract»

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  • Electronic switches for single-aerial working

    Publication Year: 1946, Page(s):1575 - 1584
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1484 KB)

    First Page of the Article
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  • Low-power resonant-segment magnetrons for centimetre waves

    Publication Year: 1946, Page(s):1585 - 1592
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1174 KB)

    This paper describes the development and use of a range of small glass magnetrons for use as low-power sources in the centimetre band. Although originally designed for measurement purposes and as local oscillators in receivers, they have proved most useful as oscillators for centimetre-wave transmitters. These magnetrons have an anode system consisting of a number of interleaved segments and are p... View full abstract»

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  • Naval radar anti-jamming technique

    Publication Year: 1946, Page(s):1593 - 1601
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1507 KB)

    The use of radar in the 1939¿45 War was quickly followed by the development of methods of ¿jamming¿ radar equipments in order to reduce their operational value. Specimen photographs are shown in the paper of the appearances of various types of jamming signal on radar displays. Investigations of the effects of jamming led to the establishment of design practices which resulted in appreciable red... View full abstract»

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  • A precision time-base and amplifier developed for radar range measurement

    Publication Year: 1946, Page(s):1602 - 1610
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1202 KB)

    A precision time base for use in a coastal defence fire-control radar set is described. The accuracy is about 1 part in 2 000 and the flexibility and neat method of display make it a useful and versatile time base. Three variations, derived from this original time base are also described. The first of these is a simplified precision version for anti-aircraft fire-control radar. The others are for ... View full abstract»

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  • Corrigendum: Theory and design of high-power pulse transformers

    Publication Year: 1946
    IEEE is not the copyright holder of this material | PDF file iconPDF (132 KB)
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Aims & Scope

The Journal of the Institution of Electrical Engineers - Part IIIA: Radiolocation was published by the IET in 1946.

Full Aims & Scope