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Radio and Electronic Engineer

Issue 5 • Date May 1977

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Displaying Results 1 - 8 of 8
  • Technology and the Annan Committee

    Publication Year: 1977, Page(s):193 - 194
    IEEE is not the copyright holder of this material | PDF file iconPDF (269 KB)
    Freely Available from IEEE
  • Noise equalization in h.f. receiving systems

    Publication Year: 1977, Page(s):195 - 206
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1425 KB)

    The paper analyses a concept of noise equalization that can be applied in order to reduce the noise contribution due to intermodulation effects without affecting the basic signal to noise performance. Some practical applications of the noise equalization technique are outlined and the resulting operational benefits demonstrated. View full abstract»

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  • Radar signal loss resulting from sub-optimal phase quadrature processing

    Publication Year: 1977, Page(s):207 - 208
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (207 KB)

    The effective difference in sensitivity between two types of detection threshold is derived. They are a single threshold placed on the envelope of a complex signal, and a pair of thresholds placed on the modulus of each of the resolved quadrature components. It is shown that the loss which results for the sub-optimal case is acceptably small. View full abstract»

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  • Mobile radio frequency synthesizers based on surface acoustic wave oscillators

    Publication Year: 1977, Page(s):209 - 216
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1149 KB)

    Delay-stabilized surface acoustic wave oscillators are attractive for use as stable, low-noise sources in digital frequency synthesizers for mobile radio. Here the design and operating principles of the surface acoustic wave oscillator are briefly reviewed. Its application is subsequently detailed in three experimental frequency synthesizer modules, which phase lock the surface acoustic wave oscil... View full abstract»

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  • A low distortion tri-wave to sine converter

    Publication Year: 1977, Page(s):217 - 224
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (737 KB)

    A new triangle-to-sine shaper circuit is described based upon the modified transfer function of a differential pair of transistors. Computer-aided design techniques have been used to establish an optimized set of design criteria. Theoretical figures as low as six parts per million total harmonic distortion (t.h.d.) are possible with the circuit. Measurements taken on a prototype have fulfilled the... View full abstract»

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  • Broadband RC-loaded microwave cylindrical antenna with approximately real input admittance

    Publication Year: 1977, Page(s):225 - 228
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (449 KB)

    A method is presented for theoretical synthesis of loaded broadband cylindrical antenna with minimized input susceptance. Such an RC-loaded antenna was synthesized and realized, having the v.s.w.r. with respect to a real impedance of about 1.1 in a frequency range of almost 3:1, thus being probably the best cylindrical broadband antenna available. The antenna radiation pattern was found to be reas... View full abstract»

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  • Synthesis of broadband cylindrical monopole antenna with parasitic elements

    Publication Year: 1977, Page(s):229 - 231
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (319 KB)

    A method is presented for synthesis of the optimal broadband cylindrical monopole antenna with two closely spaced identical parasitic elements. The proximity and end effects are taken approximately into account, which results in a better agreement between theoretical and experimental results. A very flexible experimental model is described, which even allows an experimental synthesis of the antenn... View full abstract»

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  • Experimental direct broadcast reception of 12GHz television signals from the Canadian Communications Technology Satellite

    Publication Year: 1977, Page(s):234 - 236
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (524 KB)

    In order to gain practical experience of reception of television from satellites, a long-term experiment has been set up in Canada. The ground receiving station equipment and the monitoring arrangements are described. View full abstract»

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