# Electrical Engineers, Proceedings of the Institution of

## Filter Results

Displaying Results 1 - 22 of 22
• ### Technique for Doppler-invariant detection in fixed-range radar and communication systems using surface-acoustic-wave devices

Publication Year: 1976, Page(s):277 - 280
| | PDF (557 KB)

A scheme for a coherent fixed-range miniature radar in which surface-acoustic-wave devices are used to provide an output function insensitive to Doppler shift is described. The transmitted signal is a high-duty-cycle pulse train coded with biphase modulation according to a pseudorandom binary sequence. In the interpulse period, the total electrical quiescence of the transmitter is achieved. Receiv... View full abstract»

• ### Aircraft antenna system analysis

Publication Year: 1976, Page(s):281 - 284
Cited by:  Papers (2)
| | PDF (529 KB)

Diffraction techniques in conjunction with classical geometrical optics methods have been used to analyse the elevation plane patterns of antennas mounted on different locations of an aircraft. The frame of the aircraft has been modelled using wedged and curved surfaces. Computed results have been compared with scaled-model measurements and are in very good agreement. Antenna locations examined ar... View full abstract»

• ### Precise dielectric measurements at 35 GHz using an open microwave resonator

Publication Year: 1976, Page(s):285 - 290
Cited by:  Papers (38)
| | PDF (731 KB)

An investigation has been carried out into the use of an open microwave resonator for dielectric measurements. The resonator is of the hemispherical type and consists of one plane and one concave copper mirror. The sample is a plane parallel sheet of lateral dimensions Â¿ 50 mm and is placed on the plane mirror. The theory has been extended to cover this type of resonator. Measurements on unsinter... View full abstract»

• ### Numerical solution for nonreciprocal inhomogeneous waveguide interface

Publication Year: 1976, Page(s):291 - 297
Cited by:  Papers (3)
| | PDF (721 KB)

Mode matching is used to analyse the interface between a reciprocal homogeneous waveguide and a nonreciprocal inhomogeneous waveguide. The configuration used for the nonreciprocal structure is that of the twin-slab ferrite-loaded waveguide. The investigation is restricted to symmetrical E-plane loading, and to lossless structures in which only one mode may propagate. Based on the analysis, the int... View full abstract»

• ### Transition section spurious mode program

Publication Year: 1976
| | PDF (146 KB)

A transition section spurious mode program is presented to calculate the magnitude and phase of propagating modes in H-plane waveguide transition sections with large flare angles. This program is based on a full wave analysis which employs local radial waveguide modes. This program is particularly suitable when some of the waveguide modes change from propagating to evanescent modes in the transiti... View full abstract»

• ### Study of high-order vertical-aperture correction

Publication Year: 1976, Page(s):299 - 308
| | PDF (1009 KB)

Vertical aperture correction has been treated as a spatial transversal filter problem. A method of deriving filter coefficients for infinite-order correction is described and examples are given in the appendix. Finite-order correction based on a maximally-flat frequency characteristic is then discussed. The effects of interlace and noise are considered and the conclusion is reached that correction... View full abstract»

• ### Decision-directed demodulation of frequency-shift-keyed signals

Publication Year: 1976, Page(s):309 - 313
Cited by:  Papers (1)
| | PDF (533 KB)

Coherent demodulation of continuous-phase frequency-shift keyed (f.s.k.) signals is achieved by generating the receiver waveforms according to previous demodulator decisions. Convolution of phase information in the signaling waveform gives rise to the possibility of an error-detection process. A particularly simple process can be implemented for f.s.k. signals with deviation ratios in the range 0.... View full abstract»

• ### Improved retransmission logics for bidirectional ARQ systems

Publication Year: 1976, Page(s):314 - 318
| | PDF (524 KB)

Two retransmission logics are described which, when used in conjunction with high-reliability bidirectional datatransmission systems, can improve the throughput by up to 17% compared with systems using Metzner's newwordÂ¿ strategy. Only a small amount of additional logic is required at transmitter and receiver. View full abstract»

• ### Design of differential-voltage-controlled current source

Publication Year: 1976, Page(s):319 - 324
Cited by:  Papers (1)
| | PDF (666 KB)

General purpose, precise, d.c.-coupled, large-signal and wide-band differential-voltage-controlled current source (d.v.c.c.s.) suitable for monolithic fabrication has been designed. The transconductance is controlled by an external precision resistor and hence is linear and relatively temperature insensitive. The influence of transistor parameters and bias conditions on the behaviour of d.v.c.c.s.... View full abstract»

• ### Reliability evaluation of electrical systems with switching actions

Publication Year: 1976, Page(s):325 - 330
Cited by:  Papers (17)
| | PDF (726 KB)

The paper presents a new approach for comparing the reliability of different designs for electrical systems with switching actions; this switching taking place following a fault in the system. An efficient program to evaluate the failure modes of each load point and its associated reliability indices has been developed. Also a concept of system minimal cutsets is introduced to assess the overall s... View full abstract»

• ### Optimal cable profile of l.v. radial distributors. Two mathematical programming methods

Publication Year: 1976, Page(s):331 - 334
Cited by:  Papers (2)
| | PDF (443 KB)

Two different methods for finding the optimal cable profile of tapered low-voltage multibranched distributors are presented. One method is for tapering between nodes assuming a change in cable size can occur anywhere within a branch, the other is for tapering at nodes where a change in cable size is allowed only from branch to branch. Both can be embedded in a general procedure for designing distr... View full abstract»

• ### New improvements in the computation of the polyphase induction-motor magnetic circuit

Publication Year: 1976, Page(s):335 - 341
Cited by:  Papers (2)
| | PDF (988 KB)

The present paper introduces a method of determining the airgap-flux-density waveshape in a polyphase induction motor operating under saturation conditions. It proposes to characterise the magnetic-circuit saturation by means of two independent factors, considering both the tooth and core saturation - and it produces new computative curves required to determine the magnetising current. The paper a... View full abstract»

• ### Discussion on 'Control of power on a large diesel-electric locomotive of new design'

Publication Year: 1976, Page(s):341 - 342
| PDF (335 KB)
• ### Programmable testing equipment for power-system protective equipment

Publication Year: 1976, Page(s):343 - 349
Cited by:  Papers (2)
| | PDF (1047 KB)

Present testing equipment does not enable the performance of protective equipment to be assessed over the wide range of conditions encountered on modern power systems. System behaviour may be determined by digital-computer studies or measurements made either on transient analysers or the actual networks. Thereafter it is desirable that the appropriate voltages and currents be regenerated in labora... View full abstract»

• ### Discussion on 'Internally force-cooled power cables; optimum working temperature in the range 70-358 K'

Publication Year: 1976, Page(s):350 - 352
| PDF (550 KB)
• ### Digital simulation of faulted e.h.v. transmission lines with particular reference to very-high-speed protection

Publication Year: 1976, Page(s):353 - 359
Cited by:  Papers (30)
| | PDF (862 KB)

Increasing demands for ultralow fault clearance times in electrical power systems require that measurements be made from information derived from power lines during a very short interval after fault inception. For research and development purposes, the precise nature of this information is required, and in this paper modern transmission-line theory is used to predict the fault-transient behaviour ... View full abstract»

• ### Circuit analysis of metal-halide lamp with inductive-capacitive ballast

Publication Year: 1976, Page(s):360 - 362
| | PDF (272 KB)

An idealised characteristic for the dynamic behaviour of the metal-halide lamp at 50 Hz is used in the circuit analysis for the series inductive-capacitive ballast. Distortion of the current waveform is shown to increase when the capacitor-impedance/inductor-impedance ratio is increased, or when the supply-voltage/lamp-voltage ratio is decreased. The voltage developed across the inductor at the en... View full abstract»

• ### Improved solid-state direction-sensitive phase-angle monitor

Publication Year: 1976
| PDF (81 KB)
• ### Static torque production in saturated doubly-salient machines

Publication Year: 1976
| PDF (120 KB)
• ### Nonlinear power-system optimisation using dynamic sensitivity analysis

Publication Year: 1976, Page(s):365 - 370
Cited by:  Papers (2)
| | PDF (761 KB)

A number of applications of the concepts of dynamic sensitivity analysis to power-system-stability problems are considered in the paper and sensitivity equations for a nonlinear power-system model have been derived in a form suitable for solution on a digital computer. A comparison of sensitivity curves for variations in typical system parameters has been made, and these curves have been used to p... View full abstract»

• ### Asymptotic approximation method of optimal control applied to a power-system problem

Publication Year: 1976, Page(s):371 - 376
| | PDF (658 KB)

A single machine power system connected to an infinite bus with both voltage regulator and speed governor controls is considered. This system mathematically can be described by an 8th-order nonlinear time-delay model. However, by perturbing a small scalar parameter, this 8th-order model can be reduced to a 3rd-order ordinary model without any pure time delays. An asymptotic approximate solution is... View full abstract»

• ### Box, Jenkins-ÃstrÃ¶m and Kalman linear control laws and their equivalence

Publication Year: 1976, Page(s):377 - 380
| | PDF (365 KB)

A state-space equivalent of the general Box, JenkinsÂ¿ÃstrÃ¶m single input/output, discrete stochastic-system model is given. The noiseÂ¿ estimates from them are shown to be the same. It is suggested that equivalence of the controls, for the same cost function, follows directly; but the equivalence is also demonstrated more formally. The relation of these results to those for a model with uncorr... 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