# Electrical Engineers, Proceedings of the Institution of

## Filter Results

Displaying Results 1 - 25 of 45
• ### Piccolo 32-tone telegraph system in diplomatic communication

Publication Year: 1972, Page(s):1229 - 1236
Cited by:  Papers (3)
| | PDF (1407 KB)

In 1963, details were published of a new method of teleprinter signalling for use on high-frequency radio circuits. This system (Piccolo) uses a different tone to represent each of the 32 characters of the teleprinter alphabet; the tones are orthogonally related and are detected at the receiver by quenched resonators. Piccolo has been further developed and refined, and has been adopted by the Brit... View full abstract»

• ### Numerical methods for wavefront analysis

Publication Year: 1972, Page(s):1237 - 1242
| | PDF (747 KB)

The problem considered is that of calculating the angles of arrival of the components of a multimoded signal from simultaneous measurements of the signal induced in each element of a linear array. A numerical method is described in which the arrival angles are obtained from the roots of a polynomial whose coefficients are solutions of a set of linear equations. This method has been applied to dete... View full abstract»

• ### Radiation of coupled-waveguide antennas

Publication Year: 1972, Page(s):1243 - 1250
| | PDF (867 KB)

An investigation has been carried out on the two radiated beam patterns of a coupled-waveguide antenna. In general, the shapes of the two beams differ because of propagation asymmetry about the coupling plane. Using the analysis of the coupled-mode theory, it has been shown that, for antennas where very little of the input energy is radiated, the two beams can be made almost similar by appropriate... View full abstract»

• ### Local-oscillator-circuit optimisation for minimum distortion in double-balanced modulators

Publication Year: 1972, Page(s):1251 - 1256
| | PDF (626 KB)

The distortion performance of double-balanced switching-diode mixers and modulators may be optimised by suitable design of the local-oscillator circuit. The paper describes simple techniques for defining optimum drive conditions for split-ringÂ¿, hybridÂ¿, and `starÂ¿ modulators. View full abstract»

• ### Susceptance-slope parameter of junction circulators

Publication Year: 1972, Page(s):1257 - 1261
Cited by:  Papers (5)
| | PDF (450 KB)

The two quantities which define the performance of the junction circulator are its shunt conductance and its susceptance-slope parameter. It is shown in this paper that these two quantities are related in a universal way by the difference between the two split frequencies of the junction resonant modes. For many junctions, the difference between these frequencies is connected in a standard way to ... View full abstract»

• ### Computer-controlled queuing system with service interruptions

Publication Year: 1972, Page(s):1262 - 1268
| | PDF (645 KB)

The paper presents a detailed study of a computer-controlled queuing system with Poisson input, first-come-first-served queue discipline and multiple-exponential servers that are subject to breakdowns and repairs. A generating function for the state probabilities of the system and a necessary and sufficient condition for the existence of statistical equilibrium for the system are derived. Further,... View full abstract»

• ### Use of exclusive-OR gates for boolean minimisation

Publication Year: 1972, Page(s):1269 - 1272
| | PDF (369 KB)

An algorithm for the minimisation of logic functions using XOR (exclusive-OR) gates in addition to AND, OR and INVERT gates is presented. It applies to functions with inherent symmetries, and the saving of hardware compared with that achieved by other minimisation methods is typically 40Â¿60%. The algorithm could be included in the minimisation part of an automated-logic design program, or used as... View full abstract»

• ### Analysis of a high-efficiency electron collector for a travelling-wave tube

Publication Year: 1972, Page(s):1273 - 1274
| | PDF (294 KB)

Methods have been developed for the analysis of sophisticated electron-collection systems. The electron beam is treated either by representing it by a finite number of supersized charge carriers or (providing that the angle of divergence of the beam is small) by using a modification of the paraxial-ray equation. The results are employed to obtain a quantitative estimate of the collector efficiency... View full abstract»

• ### Generation of trees, cotrees and 2-trees of a linear graph

Publication Year: 1972, Page(s):1275 - 1277
| | PDF (404 KB)

A new algorithm for finding all trees, cotrees and 2-trees in a connected linear graph is given. The procedure will not generate any duplication, redundancies or cancellation of terms. The method given is based only on the definition of tree, so that no complexity arises. Further, it is shown that, if a certain condition is satisfied by the graph, the 2-trees can be obtained directly from the tree... View full abstract»

• ### Optimisation of slope of difference-mode radiation pattern in sum-and-difference-comparison monopulse radar

Publication Year: 1972, Page(s):1278 - 1279
| | PDF (149 KB)

The expression of the field pattern due to four squinted horns is deduced by using the Eulerian transformation and translation. This expression is solved by computer to optimise the slope of the difference-mode field pattern. View full abstract»

• ### Propagation and radiation behaviour of corrugated feeds

Publication Year: 1972
Cited by:  Papers (3)
| PDF (201 KB)
• ### Crab's-eye filter

Publication Year: 1972
| PDF (148 KB)
• ### Forbidden regions for the poles of a 3rd-order equal-valued-resistor active lowpass filter

Publication Year: 1972, Page(s):1281 - 1282
Cited by:  Papers (1)
| PDF (285 KB)
• ### Characteristics of dielectric-tube-loaded coaxial cables

Publication Year: 1972, Page(s):1282 - 1283
| PDF (282 KB)
• ### Fuel gauge for the electric car

Publication Year: 1972
| PDF (145 KB)
• ### An abundance of sinusoidal RC oscillators

Publication Year: 1972, Page(s):1283 - 1284
| PDF (178 KB)
• ### Stability study of controlled rectifiers using a new discrete model

Publication Year: 1972, Page(s):1285 - 1293
Cited by:  Papers (17)
| | PDF (921 KB)

The paper is concerned with the stability of closed-loop control systems incorporating controlled rectifiers. A suitable small-signal model for a convertor is developed which takes into account the discrete behaviour of the controlled rectifier. This model permits the use of standard sampled-data control-system theory in the stability analysis of the system. Contrary to usual practice, the a.c. sy... View full abstract»

• ### Discussion on "Thermal insulation for energy storage"

Publication Year: 1972
| PDF (188 KB)
• ### Distributed moving-boundary circuit-breaker model

Publication Year: 1972, Page(s):1295 - 1300
Cited by:  Papers (1)
| | PDF (798 KB)

The behaviour of the arc in the throat of an air-blast circuit breaker around a current zero is analysed by applying a simplified energy-balance equation to a constant-pressure model having a flexible radial temperature distribution and a variable conducting radius, as determined by a boundary-loss empirical formula derived from the steady v/i characteristic. Such a model, in a single-frequency-fa... View full abstract»

• ### General theory of solid-rotor induction machines

Publication Year: 1972, Page(s):1301 - 1308
Cited by:  Papers (13)
| | PDF (902 KB)

A general theory of the torque/slip and current/slip characteristics of solid-rotor induction machines is developed in terms of dimensionless coefficients, and its validity is demonstrated by measurements on machines in the range 6Â¿1500 W. Generalised characteristics are presented in the form of curves of the dimensionless coefficients. The analysis is based on an expression for equivalent rotor ... View full abstract»

• ### Prediction of transient performance of isolated saturated synchronous generator

Publication Year: 1972, Page(s):1309 - 1318
Cited by:  Papers (4)
| | PDF (1153 KB)

The paper describes a digital simulation of a 3-phase model of a synchronous generator, directly in phase quantities. It is shown how, on the assumption that saturation arises principally from the resultant direct-axis current, the corresponding nonlinearities may be included in the equations of the model. The equations are developed in a form suitable for the study of both symmetrical and asymmet... View full abstract»

• ### Standardisation of plant and equipment for public electricity supply. An Area Board's aims and experiences

Publication Year: 1972, Page(s):1319 - 1328
| | PDF (1489 KB)

The paper is a review of the aims and experiences of the London Electricity Board, over the 23 years since its formation in 1948, in standardising all the major items of plant and equipment used in the supply of electricity to the inner areas of Greater London. During this period, a growth in demand of some 2400 MW has been met by replacement and reinforcement of existing systems using a very limi... View full abstract»

• ### Discussion on 'Comparisons of synchronous-machine models in the study of the transient behaviour of electrical power systems'

Publication Year: 1972, Page(s):1329 - 1337
| PDF (1586 KB)
• ### Erratum: Comparisons of synchronous-machine models in the study of the transient behaviour of electrical power systems

Publication Year: 1972
| PDF (113 KB)
• ### Performance of a synchronous generator with a bridge rectifier

Publication Year: 1972, Page(s):1338 - 1342
Cited by:  Papers (14)
| | PDF (518 KB)

The performance of a cylindrical-rotor generator, without damper windings, connected to an uncontrolled bridge-rectifier load, is considered. Assuming constant field-flux linkages, equations are derived which enable the performance of generators to be predicted. The commutation angle, the displacement angle and the field-current perturbation are the quantities which characterise generators with re... 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