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Radio and Electronic Engineer

Issue 11 • Date November 1971

 This issue contains several parts.Go to:  Part S 

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Displaying Results 1 - 8 of 8
  • The engineer in europe

    Publication Year: 1971
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (134 KB)

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  • A transponding acoustic fish tag

    Publication Year: 1971, Page(s):483 - 489
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2454 KB)

    A description is given of the design construction and trials of an acoustic fish tag. The tag contains receiver and transmitter sections used in a transponding mode. The size of the unit is 5 cm long by 1 cm diameter, and it weighs 4.0 g in sea water of salinity 35%. Further development is discussed. Battery/life is dependent on the rate of interrogation. Applications include the study of fish beh... View full abstract»

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  • Bidirectional action in pipe flow simulators

    Publication Year: 1971, Page(s):490 - 492
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (438 KB)

    The automatic reversibility of `pipe cells¿ which simulate the flow of fluid in pipes in reviewed. The design and performance of a reversible cell, based on the use of an integrated circuit operational amplifier to provide unity gain, are described. The possibility is examined of replacing the resistor-diode law-forming networks customarily employed in pipe cells by space-charge-limited silicon r... View full abstract»

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  • Thin cylindrical antenna: variational solution with polynomial current approximation

    Publication Year: 1971, Page(s):493 - 500
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (967 KB)

    All existing variational solutions to thin cylindrical antenna problems use two-term trial functions for currents, the form of which must either be based on some prior knowledge of current distribution along the antenna, or obtained by some other method. The present paper is aimed at eliminating these deficiencies in the applications of the variational method, by using as the trial function for cu... View full abstract»

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  • State variable methods in antenna servo analysis

    Publication Year: 1971, Page(s):501 - 509
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (771 KB)

    The state space method is applied to the analysis of a servomechanism to demonstrate how the method can be used to find the repsonse of a proposed system to any type of deterministic input or disturbance. It is shown that linear input signals can be simply incorporated in the A matrix as input state variables. The A matrix for two realistic models of an antenna control system are then developed in... View full abstract»

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  • Biquadratic sections using generalized impedance converters

    Publication Year: 1971, Page(s):510 - 512
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (330 KB)

    A low-sensitivity RC-active biquadratic section is proposed which employs a generalized impedance converter embedded in a simple passive RC-structure. This may be used to realize complex high-Q pole-pairs and transmission zeros. The multi-parameter sensitivity of the transfer function is independent factor. A high-quality narrow-band elliptic band-pass filter is given as a example. View full abstract»

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  • An observed r.f. hysteresis characteristic of particular gunn diodes

    Publication Year: 1971, Page(s):513 - 521
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1221 KB)

    Certain Gunn diodes, when mounted in half-wave resonant cavities, exhibited marked hysteresis in r.f. power when the bias voltage was increased above threshold and then reduced. Observations and measurements are described of the dependence on circuit loading of this phenomenon, and the associated I-V curve of the diode. Explanations of the phenomenon are proposed, based on recent investigations in... View full abstract»

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  • A royal intervention in early submarine telegraphy

    Publication Year: 1971, Page(s):522 - 524
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1211 KB)

    A brief note on Wheatstone's contributions to submarine telegraphy together with a suggestion made by the Prince Consort on the use of sea water as conductor. View full abstract»

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