Electrical Engineers, Proceedings of the Institution of

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Publication Year: 1965, Page(s):839 - 848
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The measurement of incoherent radar-echo powers much smaller than receiver noise can be achieved by using long-period postdetector integration. Suitable very stable integrators usually operate by integrating over successive discrete periods, dumpingÂ¿ the total and restarting at the end of each period. This behaviour is different from that of the continuous integrator of the sliding rectangular ... View full abstract»

• Characteristics of atmospheric radio noise observed at Singapore

Publication Year: 1965, Page(s):849 - 860
Cited by:  Papers (1)
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Measurements of the amplitude probability distributions of atmospheric radio noise in a power bandwidth of approximately 400c/s, made at the Radio Research Station, Singapore, from September 1958 to July 1960, are presented for frequencies of 24 kc/s, 145 kc/s, 11 Mc/s and 20 Mc/s. Results are normalised to the r.m.s. amplitude to show the diurnal and seasonal variations of noise structure. The te... View full abstract»

• Development of secondary surveillance radar for air-traffic control

Publication Year: 1965, Page(s):861 - 871
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The considerations leading to the development of secondary surveillance radar (s.s.r.) for air-traffic control are listed. The evolution of s.s.r. is described from a simple responder capable of operation with primary radar to a complex system employing special frequencies and coding facilities on the ground-to-air and air-to-ground channels. The evaluation at London Airport of a relatively simple... View full abstract»

• Diazigzag aerial

Publication Year: 1965, Page(s):872 - 876
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The characteristics of a new travelling-wave aerial (consisting of a conventional zigzag aerial to which a conducting mast is connected at alternate crossover points) are described. Electrical performance is improved, with regard to operating bandwidth, for two versions of this aerial, and, in one case, v.s.w.r. also is improved. Both aerials are mechanically stronger than the simple zigzag aerial... View full abstract»

• Propagation coefficient for the current distribution along a cylindrical antenna immersed in a warm plasma

Publication Year: 1965, Page(s):877 - 882
Cited by:  Papers (2)
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A perfectly conducting, infinitely long cylindrical wire of radius a surrounded by an insulating layer of a cylindrical sheath of free space of radius b is immersed in a homogeneous, warm plasma of infinite extent. Using the linearised plasma theory and approximate boundary conditions, the dispersion equation for the propagation coefficient along the wire is derived. The numerical solution of the ... View full abstract»

• Transverse-network representation for inhomogeneously filled circular waveguide

Publication Year: 1965, Page(s):883 - 894
Cited by:  Papers (7)
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A transverse-network representation for hybrid modes in inhomogeneously filled waveguides is derived using a method employed previously in the representation of slotted waveguides. It is shown that hybrid modes may be represented by a pair of coupled radial-line modes of pure H and E type. General expressions for the input impedances and admittances of the H- and E-type radial lines are developed ... View full abstract»

• Darlington's conjectures

Publication Year: 1965, Page(s):895 - 900
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A lumped linear nonseries-parallel 3-terminal RC network containing three internal nodes is analysed by taking specific numerical examples. Although in every case a series-parallel equivalent is obtainable, there are considerable differences between the various cases. Three examples are considered in detail in the paper. In two of these, one extra factor is required, and in all three cases excess ... View full abstract»

• RC active filters using an amplifier as the active element

Publication Year: 1965, Page(s):901 - 912
Cited by:  Papers (6)
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A new synthesis technique, involving a voltage amplifier with shunt feedback or a current amplifier with series feedback, is developed for RC active filters. Illustrative examples together with some experimental results are included; close agreement with theory is demonstrated. Tables have been prepared giving Horowitz's optimum polynomial decomposition for various Butterworth and ChebyÂ¿shev low-... View full abstract»

• Bandpass filtering characteristics

Publication Year: 1965, Page(s):912 - 914
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• Return-difference measurement in transistor feedback amplifiers

Publication Year: 1965, Page(s):914 - 915
Cited by:  Papers (2)
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• Torsional-mode magnetostrictive delay-line device

Publication Year: 1965, Page(s):916 - 917
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• Measurement of u.h.f. phase and amplitude using a sampling oscilloscope

Publication Year: 1965, Page(s):917 - 918
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• Generation of waveforms at very low frequencies using the sampling technique

Publication Year: 1965
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• Methods of measuring radio interference from high-voltage insulators

Publication Year: 1965, Page(s):919 - 924
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A critical study of the methods available for the measurement of radio interference from high-voltage insulators has been made by comparing the results obtained with the various methods for a range of insulators. It was found that the method which measured the noise current through a resistor coupled to the high-voltage system by a capacitor gave consistent results for all insulators. The second m... View full abstract»

• Radio interference from high-voltage insulators and factors which affect the interference level

Publication Year: 1965, Page(s):925 - 930
Cited by:  Papers (1)
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Investigations were made into the origins and causes of radio interference from high-voltage insulators, and factors which affect the interference level were studied. Pin-type, multicone post-type and pedestal-type insulators were used. In pin-type insulators, over their working voltage range practically all interference was generated in the region of contact between the high-voltage conductor and... View full abstract»

• Balancing bundle-conductor transmission-line constants without transpositions

Publication Year: 1965, Page(s):931 - 940
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Transpositions, although considered necessary to balance the constants of an h.v. overhead transmission line, are costly and sometimes troublesome in operation; hence the desirability of balancing the line constants without transpositions. Possibilities of separately balancing inductances, earth capacitances and mutual capacitances between phases are considered, by adjusting the equivalent radii o... View full abstract»

• Calculation of travelling waves on transmission systems by finite differencess

Publication Year: 1965, Page(s):941 - 948
Cited by:  Papers (4)
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The paper is concerned with attenuation and distortion of travelling waves on transmission systems. The conventional calculation of such phenomena is based on matrix operational methods: a different approach is suggested, namely the method of finite differences, which as an iterative numerical method is ideally suited to consideration of nonlinearities. A central-difference formula is employed to ... View full abstract»

• Design of I.v. distributors from standard cable sizes

Publication Year: 1965, Page(s):949 - 956
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An analytical study is made with the aid of a digital computer of the economic design of uniformly loaded a.c. distributors under balanced-phase loading conditions. The optimum profile of a continuously tapered distributor is obtained by an application of the calculus of variations, and the method is developed to cover the corresponding practical problem of designing a stepped distributor from sta... View full abstract»

• Further developments in the design and performance of high-voltage terminal boxes

Publication Year: 1965, Page(s):957 - 964
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Since the publication in 1962 of a paper on the basic dielectric and safety requirements of terminal boxes, considerable successful experience has been gained in the former respect, and further developments have taken place in the latter respect. A method has been found, and proved by test, to obviate the explosion danger of compound-filled sealing boxes used in conjunction with terminal boxes, on... View full abstract»

• Parallel operation of transductor-controlled silicon-rectifier equipment with waterwheel-driven d.c. generators supplying an aluminium potline

Publication Year: 1965, Page(s):965 - 976
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Transductor-controlled silicon-rectifier equipment has recently been commissioned in an aluminium factory in Scotland. The equipment runs in parallel with the existing Pelton waterwheel-driven d.c. generators to supply the 60Â¿70 reduction furnaces which make up the aluminium potline. The anode effects in the potline introduce transient current and voltage fluctuations on the system. Parallel-conn... View full abstract»

• Geometric construction of the stability limits of synchronous machines

Publication Year: 1965, Page(s):977 - 985
Cited by:  Papers (1)
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The paper analyses the conditions for stability of synchronous generators, or motors in steady-state operation, with and without assistance from voltage-regulating equipment. A simple geometric construction on a `capability chartÂ¿ of the machine is used to display the operating limits and to demonstrate the influence of exciter time constant and damping coefficient on dynamic stability. View full abstract»

• Method of predicting the thermal loading of an oil circuit breaker

Publication Year: 1965, Page(s):986 - 994
Cited by:  Papers (1)
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The various factors influencing the temperature rises in bulk-oil circuit breakers are discussed and details of direct measurements on a certain circuit breaker with unplated contacts are given. A method for dretermining transient temperatures in the bushings using an electrical resistance capacitance heat-flow analogue in conjunction with the direct measurements is described. This method gives te... View full abstract»

• Simple phase-detection relay for distribution networks

Publication Year: 1965, Page(s):995 - 999
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For the detection of reverse power flow in medium-voltage networks, induction-disc-type relays are usually employed. This paper describes a simple phase-detection relay which is capable of indicating revers power flow in certain types of network. The relay described uses the characteristics of Zener diodes and is simple in design, cheap in cost and is capable of extensive application. The performa... View full abstract»

• Printed-disc inverse-time overcurrent relay

Publication Year: 1965, Page(s):1000 - 1006
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The paper describes a new type of electromechanical inverse-time overcurrent device for the protection of power-supply circuits. The various time/current characteristics of the new relay and the methods by which they are obtained are given, and some basic features are discussed. A method of compensating for the timing errors caused by ambient-temperature change is described. View full abstract»

• Discussion on 'Control and safety requirements for the electrical engineering design of the CEGB nuclear power stations'

Publication Year: 1965, Page(s):1006 - 1010
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Aims & Scope

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

Full Aims & Scope