Radio and Electronic Engineer
Volume 33, Issue 1, January 1967
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Volume 33, Issue 1
January 1967
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- Author(s): Emrys Williams
- Source: Radio and Electronic Engineer, Volume 33, Issue 1, p. 1 –8
- DOI: 10.1049/ree.1967.0001
- Type: Article
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- Author(s): A.G.J. Holt and K.M. Reineck
- Source: Radio and Electronic Engineer, Volume 33, Issue 1, p. 9 –16
- DOI: 10.1049/ree.1967.0002
- Type: Article
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A passive R-C synthesis is presented for transfer functions containing complex or imaginary zeros in the left half of the p-plane. The poles of the function are required to be negative real.The synthesis procedure is extremely simple and requires very little computation. The networks described and realized are basically twin-T structures which can contain a load, series source impedance or a bridging network depending on the nature of the transfer function to be synthesized. Examples of frequency response curves are given.Primarily this synthesis procedure is intended to provide for the realization of zero sections in active filter synthesis.
The Presidential address
Synthesis of R–C zero sections
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- Author(s): F.J. Wylie
- Source: Radio and Electronic Engineer, Volume 33, Issue 1, p. 17 –23
- DOI: 10.1049/ree.1967.0003
- Type: Article
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An interim report is given of a survey undertaken during 1963–64 on the failures encountered during a six-month period in 1000 sea-going marine radars of sixty-five different types - Author(s): M.G. Miller
- Source: Radio and Electronic Engineer, Volume 33, Issue 1, p. 24 –26
- DOI: 10.1049/ree.1967.0004
- Type: Article
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Reliability is probably the most important single factor in marine radar today. Improved components and the introduction of solidstate devices have radically improved the prospects of achieving high reliability, but more comprehensive control of quality, particularly under extremes of environmental conditions, is necessary during design and throughout production. This paper describes how the principles established by the Advisory Group on the Reliability of Electronic Equipment in the U.S.A. were utilized in the design and production of commercial electronic equipment. - Author(s): A.J. Harrison
- Source: Radio and Electronic Engineer, Volume 33, Issue 1, p. 27 –30
- DOI: 10.1049/ree.1967.0005
- Type: Article
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Records of reliability and maintenance of radar equipment on a specified group of ships (deep-sea trawlers) operating from a specified port under controlled conditions are presented. The reasons for the very long ‘mean-time-between-failures’ under these conditions are considered to be: (a) the equipment is not switched on and off but allowed to run for a long time; (b) the operators have been given training on the maintenance of this particular set; (c) the spares provisioning is at a high level, and (d) a rigid system of preventive maintenance is applied. All these factors are considered to be significant in achieving high reliability. - Author(s): G.J. McDonald
- Source: Radio and Electronic Engineer, Volume 33, Issue 1, p. 31 –34
- DOI: 10.1049/ree.1967.0006
- Type: Article
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The paper comments on the general requirements which should be met by designers of marine radar equipments. It suggests that in planning a new design the minimum standard of reliability that should be set is 500 hours mean time between failures. Some basic design precautions are then described covering various aspects of the problem from initial design and selection of components to installation, environmental and operational conditions. Short notes on maintenance and training aspects are also included. The paper concludes with an example of the extremely high reliability achievable by the use of a twin inter-switchable radar system wherein the probability of trouble-free operation over a specified period can be raised from 95.3% to 99.8% - Source: Radio and Electronic Engineer, Volume 33, Issue 1, p. 34 –36
- DOI: 10.1049/ree.1967.0007
- Type: Article
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An investigation into marine radar reliability
The application of A.G.R.E.E. principles to commercial marine radar
Radar reliability on trawlers
The attainment of high reliability of marine radar
Discussion on “The reliability of marine radar equipment”
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- Author(s): A.M. Raeburn
- Source: Radio and Electronic Engineer, Volume 33, Issue 1, p. 37 –44
- DOI: 10.1049/ree.1967.0008
- Type: Article
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Experimental investigations into the techniques of far-field ocalizer and glide-path monitoring for Category III I.L.S. installations are described. The results of monitoring at an operational airport over an extended period are presented. Two novel techniques are briefly described: (a) a system of spaced aerials for monitoring beam-bend noise, and (b) an independent side-band receiver for the detection of radio interference. - Author(s): F.G. Fernau
- Source: Radio and Electronic Engineer, Volume 33, Issue 1, p. 45 –50
- DOI: 10.1049/ree.1967.0009
- Type: Article
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The safety requirements of an automatic blind landing system imply that the ground I.L.S. transmitters must have a high ‘integrity’, a high degree of accuracy and reliability. This, in turn, implies that there must be monitors at the transmitters which can measure the main parameters of the radiated signal and react fast to any fault condition.Two types of monitor are available, near-field monitors taking their signals from field probes and internal monitors using signals from the aerial feed cables. A study of internal monitors applied to existing localizers was made as part of the R.A.E. I.L.S. feasibility study and showed that these monitors could provide accurate performance measurements and also that the localizers did achieve the required standard of stability.The integrity of the I.L.S. beacons depends largely on the way in which monitors are used; one possible monitor configuration for blind landing involves four monitors arranged to give good continuity of service and a very high probability that faults will be detected. One monitor measures the performance of the stand-by transmitter and the other three measure the radiated signals; if there is disagreement between these three the action is determined by ‘majority vote’ - Source: Radio and Electronic Engineer, Volume 33, Issue 1, p. 51 –54
- DOI: 10.1049/ree.1967.0010
- Type: Article
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I.L.S. far-field and radio environment monitoring
I.L.S. transmitter monitors for automatic blind landing
Discussion on “Monitoring of I.L.S. ground equipment for automatic landing”
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- Author(s): S. Venkateswaran
- Source: Radio and Electronic Engineer, Volume 33, Issue 1, p. 55 –64
- DOI: 10.1049/ree.1967.0011
- Type: Article
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A generalized design procedure is presented for the stage by stage build-up of synchronously tuned multi-stage linear amplifiers. The individual stages herein may be near identical and either unilateralized by external passive feedback or mismatched resistively at their ports. The design can be usefully based on the average parameters of the device type selected and its circuit components.This is illustrated by the design of a high-gain amplifier with a large fractional bandwidth utilizing non-unilateral electron devices without unilateralizing feedback. A non-unilateral amplifier was constructed based upon this stage by stage design with 'average' parameters, but using transistors of non-average parameters and circuit components with a few per cent tolerance. The measurements carried out on this amplifier, whose total stages were varied from two to seven confirm the good accuracy of the theory and design. - Author(s): H.W. Cole
- Source: Radio and Electronic Engineer, Volume 33, Issue 1, p. 65 –80
- DOI: 10.1049/ree.1967.0012
- Type: Article
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It is shown that there was a need to develop an equipment with special characteristics to meet the requirements of the current admixture of sidelobe suppression standards. Various configurations of interrogator are discussed and that adopted in the SECAR design is described in detail. The concept of ‘system beamwidth’ is introduced and discussed in relation to aerial design. Some of the design problems of the decoder are discussed and the application of the chosen technique is described
A design basis for synchronously tuned multi-stage linear amplifiers taking into account spread in device parameters
SECAR—a modern secondary surveillance radar ground interrogator and decoding equipment
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