By Topic

# Electrical Engineers, Proceedings of the Institution of

## Filter Results

Displaying Results 1 - 25 of 36
• ### Advances in microwave direction finding

Publication Year: 1966, Page(s):1697 - 1711
| | PDF (1719 KB)

The purpose of the paper is to describe three new microwave direction-finding (d.f.) systems employing the principle of amplitude comparison. Though designed, in this case, for use with pulse signals, application of the systems could also be extended to continuous-wave signals. Theoretical predictions of performance and considerations of design requirements are supported by experimental confirmati... View full abstract»

• ### Use of Mills cross receiving arrays in radar systems

Publication Year: 1966, Page(s):1712 - 1722
Cited by:  Papers (4)
| | PDF (1527 KB)

The use of Mills cross arrays has been found to be an important contribution to radio astronomy, where accurate angular resolution in azimuth and elevation can be achieved without prohibitive costs. An analysis is made of methods for applying a Mills cross array to radar. Such an array could consist of two linear arrays positioned at right angles to each other. The arrays have fan-shaped directivi... View full abstract»

• ### Instrument for rapid measurement of surface deformations of a 210ft radio telescope

Publication Year: 1966, Page(s):1723 - 1730
Cited by:  Papers (1)
| | PDF (1048 KB)

A description is given of an instrument designed for the rapid measurement of the surface deformations of the 210ft (64 m) radio telescope at Parkes, Australia. The method is based on the measurement, from the vertex, of small differences in the angular positions of targets, fixed to the dish surface, at known radial distances. The results are recorded photographically for later analysis. It is sh... View full abstract»

• ### Experimental studies of sea-surface effects on low-angle radars

Publication Year: 1966, Page(s):1731 - 1740
Cited by:  Papers (6)
| | PDF (1213 KB)

This paper presents results of measurements made during the years 1953Â¿56 on the effects of sea-surface reflections on low-angle radars at Xband frequencies. The work was done in three parts and comprised a study of the polarisation properties of sea clutter as a function of sea state, wind direction and incidence angle, a study of the position and depth of interference minima close to the sea su... View full abstract»

• ### Propagation of radio waves in a model nonuniform terrestrial waveguide

Publication Year: 1966, Page(s):1741 - 1750
Cited by:  Papers (5)
| | PDF (1295 KB)

The paper deals with propagation of radio waves in multimode waveguides of arbitrary height. In this work the boundaries are assumed to be perfectly reflecting. For the case when the height of the multimode waveguide increases monotonically in the direction of propagation, the required solution is obtained by a generalised quasioptical approach which assumes that the waveguide consists of an infin... View full abstract»

• ### Design of bidirectional coherent counters

Publication Year: 1966, Page(s):1751 - 1754
Cited by:  Papers (1)
| | PDF (295 KB)

The general design theory of coherent parallel counters is described and illustrated by the design of a 5421 BCD counter. The method shows how the counter can be steered to operate bidirectionally. Details of design data for a number of differently coded bidirectional decade counters are also given. The circuits described use JK flip flops and have been fabricated using silicon integrated circuits... View full abstract»

• ### F.E.T. high-frequency analysis

Publication Year: 1966, Page(s):1755 - 1762
| | PDF (605 KB)

The equations describing the small-signal sinusoidal operation of the intrinsicÂ¿ field-effect transistor are derived from a consideration of the basic physical principles of the operation of the device. Expressions for the small-signal short-circuit parameters in series form are obtained. Truncated forms of these series are used to compute the elements of a convenient equivalent circuit. The dep... View full abstract»

• ### Generation of high-speed waveforms using nonlinear delay lines

Publication Year: 1966, Page(s):1763 - 1768
Cited by:  Papers (6)
| | PDF (703 KB)

In nonlinear delay lines employing back biased p-n junctions as variable capacitors, the velocity of propagation is a function of signal amplitude. This effect may be used to produce short-risetime pulses which may be of high repetition rate. Two circuit applications are discussed, these being the processing of sinewaves to produce fast-edge triangular pulses, and also the processing of long-riset... View full abstract»

• ### Synchronised oscillatory systems with nonuniform gain in the feedback loop

Publication Year: 1966, Page(s):1769 - 1774
| | PDF (655 KB)

A complex synchronised oscillatory system of the feedback type, in which the overall loop frequency response has a dip, as in overcoupled resonance circuits, is studied. The advantages of such a response are emphasised. The stability within the synchronisation range is analysed. The pull-in range is obtained experimentally, and an analogue-computer network of an electronic velodyneÂ¿ is developed... View full abstract»

• ### Direct synchronisation of a sinewave oscillator to a pulse

Publication Year: 1966, Page(s):1775 - 1782
| | PDF (892 KB)

An analysis is given of the phenomenon of direct synchronisation of a sinewave oscillator to a rectangular pulse. The effect of an applied step function is investigated first, and the pulse is then considered as the application of a step, followed by its removal. By considering the action of the nth pulse in an applied pulse train, expressions are derived for most of the important effects, in term... View full abstract»

• ### General formula for power spectra of digital f.m. signals

Publication Year: 1966, Page(s):1783 - 1789
| | PDF (659 KB)

The paper is concerned with the radio-frequency spectra of digital f.m. signals. Analytical expressions for the spectrum of a carrier, phase or frequency modulated by a train of pulses of general shape, are presented under very general conditions, and particular attention is given to the conditions under which the spectrum contains lines, i.e. discrete-frequency components. View full abstract»

• ### Mode nomenclature for helix waveguide

Publication Year: 1966
Cited by:  Papers (10)
| PDF (141 KB)
• ### Comparison of Herbst and Horowitz polynomial decompositions in RC active filter synthesis

Publication Year: 1966, Page(s):1791 - 1792
Cited by:  Papers (1)
| PDF (224 KB)
• ### Calculation of the magnetic field of rotating machines. Part 5: Field in the end region of turbogenerators and the eddy-current loss in the end plates of stator cores

Publication Year: 1966, Page(s):1793 - 1804
Cited by:  Papers (6)
| | PDF (1401 KB)

A method of calculating the magnetic field in the end region of a turbogenerator is described. Allowance is made for nonmagnetic stator-core clamping plates and for the magnetic shaft and casing of the machine. The effect of a magnetic rotor-retaining ring is studied, the ring being regarded as a tube of finite permeability separating the stator and rotor end windings. Calculations are compared wi... View full abstract»

• ### Effects of asymmetry of induction-machine windings upon the slot leakage reactance

Publication Year: 1966, Page(s):1805 - 1809
| | PDF (563 KB)

It has been shown recently that asymmetrical fractional-slot windings can be devised to draw balanced currents. The leakage reactance for the three phases of these windings may, however, no longer be equal. The paper discusses the effects of the asymmetry of the windings upon one component of leakage, namely the slot leakage. It is shown that, by careful selection of the coil pitch for the winding... View full abstract»

• ### Discussion on "Recent developments in battery electric vehicles"

Publication Year: 1966, Page(s):1809 - 1812
| PDF (697 KB)
• ### Variable-characteristic d.c. machines

Publication Year: 1966, Page(s):1813 - 1819
Cited by:  Papers (2)
| | PDF (737 KB)

The paper deals with the application of pulsed voltage waveforms to the field windings of separately excited d.c. machines, and describes the development of an unusual form of control scheme, which holds the field current and the armature current in a fixed relationship. A wide range of torque/speed characteristics are shown to be possible, using simple and inexpensive control apparatus. One arran... View full abstract»

• ### Discussion on 'Electric process heating for UKAEA works'

Publication Year: 1966, Page(s):1820 - 1822
| PDF (502 KB)
• ### Operational statistics in the management of large distribution systems

Publication Year: 1966, Page(s):1823 - 1834
Cited by:  Papers (5)
| | PDF (1605 KB)

In order to manage a large distribution system in the best manner, it is considered necessary to have comprehensive, accurate and up-to-date records of the number and types of equipment items in service, together with properly analysed records of their performance. With the advent of nationalisation of the supply industry in 1948, and the formation of a small number of large undertakings, it becam... View full abstract»

• ### New method for the assessment of switching-impulse insulation strength

Publication Year: 1966, Page(s):1835 - 1841
Cited by:  Papers (6)
| | PDF (894 KB)

By examining the nature of the variate of the breakdown frequency, the conventional method of analysing data is shown to be incorrect, unless some breakdowns occur on the wavetail. A new method is devised for the derivation of the cumulative frequency distribution of breakdown voltage (or `time to breakdownÂ¿), which is an estimate of the corresponding probability distribution. The new method extr... View full abstract»

• ### Discussion on Â¿A seasonal tariff for domestic suppliesÂ¿

Publication Year: 1966, Page(s):1842 - 1845
| PDF (763 KB)
• ### Tooth-ripple losses in solid poles

Publication Year: 1966, Page(s):1846 - 1847
| PDF (272 KB)
• ### Current-compounded self-excitation circuits

Publication Year: 1966, Page(s):1847 - 1848
| PDF (176 KB)
• ### Dielectric properties of polythene for submarine telephone cables

Publication Year: 1966, Page(s):1849 - 1854
Cited by:  Papers (1)
| | PDF (711 KB)

Increases in the signal-carrying capacity of submarine telephone cables by extensions of the frequency bandwidth have led to progressively tighter specifications for the relative permittivity and losses of the polythene dielectric. A study of the factors determining the dielectric losses of low-density, i.e. high-pressure-process, polythene has resulted in a low-loss material, of precise relative ... View full abstract»

• ### Theoretical considerations of magnetostriction in silicon iron

Publication Year: 1966, Page(s):1855 - 1858
| | PDF (421 KB)

The magnetostriction of well oriented silicon iron is discussed on the basis of a simple domain model containing only 180Â° domains. The effect of an externally applied magnetic field on the domain configuration is examined on an energy basis, which indicates that the magnetostatic energy is the principal factor involved and that rotation of the domain magnetisation vector can occur at low field s... View full abstract»

## Aims & Scope

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

Full Aims & Scope