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Radio and Electronic Engineer

Issue 4 • Date October 1970

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Displaying Results 1 - 6 of 6
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  • The estimation of loss of echoing area with very high resolution radars

    Page(s): 159 - 164
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (607 KB)  

    The paper considers the use of recently published experimental data in estimating the manner in which the echoing area of an aircraft is reduced when the range resolution cell of the observing radar is smaller than the aircraft dimensions. A simple mathematical model of the echoing process is postulated and the experimental results are used in selecting the model parameters. The model is then used to predict the behaviour of the echoing area, and in addition, the echoing properties for a resolution cell which embraces the whole aircraft are shown to be in excellent agreement with the widely accepted `one dominant¿ model proposed by Swerling. View full abstract»

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  • Polarity coincidence techniques for correlation function measurement and system response evaluation

    Page(s): 165 - 172
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (847 KB)  

    The correlation functions of many classes of signals can be derived quite simply from the correlation function computed from the waveform polarity (one-bit quantization) and in situations where one-bit quantization does not yield meaningful correlation functions, the addition of auxiliary signals can lead to a proper evaluation. The design of a flexible one-bit correlator is described using Micronor II (9 ns) circuitry which operates at a basic clock rate from 0¿10 MHz and yields information on signals up to frequencies of 25 MHz. Performance details are given for the evaluation of auto-correlation functions and cross-correlation functions of various signals, and, in particular, the application to system response evaluation using Gaussian noise and binary pseudo-noise sequences. View full abstract»

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  • Quality control in capacitor production and testing

    Page(s): 173 - 192
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (3981 KB)  

    The properties of materials and the appropriate dimensions must be controlled so that the requirements of the electrical specification are met from the beginning of the life cycle of the product. The influence of design on control of manufacture is discussed and the factors which contribute to variability in production are examined. The main quality control function is to establish a `right first time¿ philosophy. While the concept of yield is inevitable in component manufacture, low yield due to lack of control is unacceptable. In-process inspection with feedback for corrective action not only maintains control but also points the way for continuous improvement of design, methods, quality and reliability. In some cases the involvement of the production operator can be obtained by allowing him to carry out this checking. Acceptance and quality assurance testing are of primary importance in demonstrating to the customer that the requirements of his specification have been met. Failures in this testing are warnings of lack of control in design, materials, or manufacture. The BS 9000 scheme is welcomed as establishing a systematic series of such tests. From the internal point of view total quality costs are the best method of measuring the performance of the entire manufacturing organization. If the quality control function is effective, and assuming no radical changes of product mix, quality costs should be falling. From the external point of view an effective quality control organization is the best assurance of consistent performance for the future. View full abstract»

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  • Horizontal aperture equalization

    Page(s): 193 - 212
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (2263 KB)  

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  • Electronic engineering in ocean technology

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    Freely Available from IEEE