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Electrical Engineers, Proceedings of the Institution of

Issue 12 • Date December 1964

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Displaying Results 1 - 23 of 23
  • Evanescent and propagating modes of dielectric-loaded circular waveguide

    Publication Year: 1964 , Page(s): 1951 - 1956
    Cited by:  Papers (30)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (682 KB)  

    The paper describes the results of a theoretical study of the properties of evanescent and propagating azimuthally dependent modes of a circular waveguide containing an axial dielectric rod. It is shown that, provided that the rod permittivity exceeds the minimum value which allows backward-wave propagation, a region of the spectrum will exist in which there are no purely propagating or purely eva... View full abstract»

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  • Measurement of reradiation from lattice masts at v.h.f.

    Publication Year: 1964 , Page(s): 1957 - 1968
    Cited by:  Papers (4)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1260 KB)  

    The reradiation coefficient of a lattice mast more than a small fraction of a wavelength wide cannot be calculated theoretically without making assumptions which may not be entirely valid. Reradiation coefficients of lattice masts have therefore been measured with models, for both vertical and horizontal polarisation and the full range of mast sizes likely to be encountered at v.h.f. The experimen... View full abstract»

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  • NonCassegrainian indirect system for aerial illumination

    Publication Year: 1964 , Page(s): 1969 - 1975
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (971 KB)  

    The illumination of large paraboloidal reflectors is increasingly being effected by indirect systems such as the so-called Cassegrainian system. A short review of wave optics shows how the range of validity of geometrical optics, and therefore of the Cassegrainian system, is restricted at radio wavelengths. A system is therefore proposed employing a secondary paraboloidal reflector exactly on the ... View full abstract»

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  • Trunking and traffic principles of a p.c.m. telephone exchange

    Publication Year: 1964 , Page(s): 1976 - 1980
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (554 KB)  

    A description is given of a method of trunking a telephone exchange situated within a p.c.m. transmission network. It is assumed that all external connections are p.c.m. junctions, either to other exchanges or to concentrators, and that switching is to be achieved without decoding. The exchange is required to switch the contents of a channel in an incoming pair to a free channel in a selected outg... View full abstract»

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  • Theory and application of the field-effect transistor. Part 1: Theory and d.c. characteristics

    Publication Year: 1964 , Page(s): 1981 - 1992
    Cited by:  Papers (5)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1220 KB)  

    The d.c. theory of the field-effect transistor is considered, and extensions of the theory are presented to account for the effects of a nonuniform channel impurity-density profile. It is shown that varying mobility effects could account for the observed Id/gm and gm variations with gate bias observed in certain silicon devices. A number of design formulas for abrupt and linearly graded junction d... View full abstract»

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  • Generation of waveforms at very low frequencies using the sampling technique

    Publication Year: 1964 , Page(s): 1993 - 2001
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (957 KB)  

    The purpose of this paper is to consider use of the sampling technique as an effective means of generating v.l.f. waveforms of good frequency stability and known harmonic content. The basic ideas of sampling are presented from the point of view of v.l.f. waveform generation, and two main types of sampling generator are discussed. A section is devoted to the harmonic content of a sampled sine wave,... View full abstract»

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  • Recent developments in radar modulation and processing techniques

    Publication Year: 1964 , Page(s): 2002 - 2015
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1969 KB)  

    Under the stimulus of developments in aeronautics, rocketry and spacecraft, radar technology has maintained the momentum of its advance. There is now a need to combine a range discrimination of, say, a few feet with pulse-modulation envelopes equivalent to several miles, and to combine very long unambiguous ranges with accurate Doppler information, good subclutter visibility and freedom from inter... View full abstract»

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  • Noise factor at optical frequencies

    Publication Year: 1964 , Page(s): 2015 - 2016
    Save to Project icon | PDF file iconPDF (330 KB)  
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  • Low-inertia reluctance machines

    Publication Year: 1964 , Page(s): 2017 - 2025
    Cited by:  Papers (7)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (989 KB)  

    Two forms of reluctance machine with rotors of low inertia, believed to be novel, are described. In the first, the salient poles are detached from the inactive portion of a normal rotor to give what may be regarded as the reluctance equivalent of the drag-cup induction machine. Inertias as low as one fifth of those of conventional machines appear to be attainable, with correspondingly high values ... View full abstract»

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  • Parallel operation of transformers with on-load tap changers and negative-reactance-compounding control

    Publication Year: 1964 , Page(s): 2026 - 2040
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1493 KB)  

    A systematic investigation has been made of the performance obtained when using a system of negative-reactance compounding for automatically controlling the tap changers of two transformers operating in parallel, either side by side or connected together through a distribution system. A wide range of operating conditions was covered by tests in the field, with a laboratory model and by computer st... View full abstract»

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  • Transient characteristics and simulation of induction motors

    Publication Year: 1964 , Page(s): 2041 - 2050
    Cited by:  Papers (13)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (993 KB)  

    The analogue simulation of induction machines is considered with the object of providing a convenient general model from which both transient and unbalanced operation of a machine may be predicted. Prior to commencing the transient analysis for a machine, the validity of the mathematical model used is assessed by comparison of practical and computed steady-state torque/speed characteristics. View full abstract»

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  • Calculation of electrical parameters for short and long polyphase transmission lines

    Publication Year: 1964 , Page(s): 2051 - 2059
    Cited by:  Papers (48)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (822 KB)  

    A previous paper described the solution of travelling-wave phenomena in polyphase systems by the use of matrix methods, in which the characteristics were defined in terms of generalised matrixes. The present paper shows how the basic matrixes of the conductor system are derived, taking into account the effect of conductor geometry, conductor internal impedance and the earth-return path. These basi... View full abstract»

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  • Marine electric propulsion

    Publication Year: 1964 , Page(s): 2060 - 2070
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (2115 KB)  

    Electric drive is not advocated for all vessels, as its adoption can involve additional weight, complexity and cost. It can be justified where flexibility of machinery layout and operation, rapid manoeuvrability, constant-power characteristics and simple provision of power for large auxiliaries are features which can be utilised in service. Both a.c.- and d.c.-transmission systems are in use; a.c.... View full abstract»

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  • Discussion on ¿Railway electrification in India¿

    Publication Year: 1964 , Page(s): 2071 - 2074
    Save to Project icon | PDF file iconPDF (648 KB)  
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  • Discussion on ¿Control of motor voltage in a.c. traction¿

    Publication Year: 1964 , Page(s): 2075 - 2080
    Save to Project icon | PDF file iconPDF (769 KB)  
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  • Discussion on influence of moisture content of soil on buried-cable ratings

    Publication Year: 1964 , Page(s): 2081 - 2095
    Save to Project icon | PDF file iconPDF (2262 KB)  
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  • Reduction of inrush-current surges in transformers

    Publication Year: 1964
    Save to Project icon | PDF file iconPDF (109 KB)  
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  • Absorption of radiation from a corona discharge in oxygen

    Publication Year: 1964 , Page(s): 2097 - 2099
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (256 KB)  

    Measurements of absorption coefficients have been made for radiation produced in a wire-cylinder discharge in oxygen at pressures between 1 torr and 50 torr. The radiation passed through a system of grids before reaching an aluminium-alloy detecting electrode. The resulting photoelectric current was measured as a function of the distance from the source of radiation. Between 10 torr and 50 torr, t... View full abstract»

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  • Measurement of correlation functions

    Publication Year: 1964 , Page(s): 2100 - 2104
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (497 KB)  

    A practical and relatively simple method of measuring correlation functions is presented. The method, which is applicable to all orders of correlation functions, is based upon orthogonal expansions. The application of this method to the experimental determination of a second-order crosscorrelation function is discussed in detail and some experimental results are presented. View full abstract»

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  • The fifty-fifth Kelvin Lecture. Superconducting magnets

    Publication Year: 1964 , Page(s): 2105 - 2110
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1041 KB)  

    First Page of the Article
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  • Losses in ferromagnetic laminations due to saturation

    Publication Year: 1964 , Page(s): 2111 - 2117
    Cited by:  Papers (7)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (742 KB)  

    The discrepancy between experimentally determined core losses and those calculated using the classical expressions for ferromagnetic laminations is well known. The paper presents an analytical solution that takes account of the saturation of the lamination material. In laminations, over the usual range of flux densities and frequencies encountered in core-loss calculations, only the fundamental fr... View full abstract»

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  • Measurement of earth-electrode resistance with particular reference to earth-electrode systems covering a large area

    Publication Year: 1964 , Page(s): 2118 - 2130
    Cited by:  Papers (8)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1337 KB)  

    The method of measuring an earth-electrode resistance has been known for a number of years, but there are some aspects of the measurement which are not fully understood. In particular, there are difficulties which arise when the earth-electrode system is of large physical dimensions, e.g. that of a substation or power station. The simple method which is normally used cannot be applied directly for... View full abstract»

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  • Discussion on "Mathematics as an educational discipline for the engineer"

    Publication Year: 1964 , Page(s): 2130 - 2132
    Save to Project icon | PDF file iconPDF (416 KB)  
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Aims & Scope

The Proceedings of the Institution of Electrical Engineers was published by the IET between 1963 and 1979.

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