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Radio and Electronic Engineer

Issue 4 • Date April 1963

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Displaying Results 1 - 11 of 11
  • Negative frequency

    Publication Year: 1963 , Page(s): 289 - 290
    Save to Project icon | PDF file iconPDF (224 KB)  
    Freely Available from IEEE
  • Transistor stabilization matrix

    Publication Year: 1963 , Page(s): 291 - 294
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (395 KB)  

    In the design of transistor networks where the bias circuits may involve several direct-coupled stages, it is sometimes difficult to obtain a simple indication of the effect of the various elements involved on the bias stability of the system. The stabilization matrix is proposed as an extension of the concept of the stability factor and examples are given of applications to several simple circuit... View full abstract»

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  • Investigation of an interaction effect between sound projectors mounted in an array

    Publication Year: 1963 , Page(s): 295 - 298
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (395 KB)  

    Measurements on acoustically small, low-loss projectors in arrays in water have shown that near resonance violent changes in their electrical admittance take place. This behaviour has been investigated by computing theoretical admittance diagrams for a cruciform array and comparing these with the anomalous measured diagrams. The shape of the two sets of diagrams are in agreement so that it can be ... View full abstract»

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  • Measurements of the target strength of fish

    Publication Year: 1963 , Page(s): 299 - 303
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (538 KB)  

    Measurements have been made at 30 kc/s of the target strength of dead cod, herring, plaice and perch. Four independent series of measurements have been made between 1955 and 1959.In three of the series, false Onazote swimbladders were placed in the body of the fish to simulate the acoustic properties of the normal swimbladder. The results are tabulated and presented in a graph, the reference level... View full abstract»

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  • A Colour television projector for medium screen applications

    Publication Year: 1963 , Page(s): 305 - 320
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (2519 KB)  

    The need for large colour displays is outlined and various methods of projection reviewed. Detailed requirements are discussed including choice of c.r.t., optical system, correction for various forms of distortion, scanning and video drive arrangements. Methods of operating are mentioned and the mechanical construction and circuit diagrams described. The paper concludes with a summary of performan... View full abstract»

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  • Loss properties of cylindrical waveguides containing gyromagnetic media

    Publication Year: 1963 , Page(s): 321 - 334
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (1145 KB)  

    The system considered is a waveguide of radius a containing a concentric rod of gyromagnetic material of radius b. The attenuation constant is given by where ¿, ¿, and ¿ are the relative permittivity and the relative permeability elements of the rod, and ¿¿, ¿¿, ¿¿ are their imaginary parts. The quantities ¿ß/¿¿, ¿ß/¿¿, ¿ß/¿¿, have been calculated for a number of values of ¿,... View full abstract»

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  • An instructional aid for digital computer logic

    Publication Year: 1963 , Page(s): 335 - 352
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (2670 KB)  

    A design is presented of a self-contained instructional aid with which the function of basic digital computing elements may be demonstrated, and in which the elements may be combined to demonstrate the more complex circuits which are part of all digital computers. The speed of operation, and the ease with which elements may be interchanged, combine to make the device particularly suitable for inst... View full abstract»

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  • Parametric amplifiers: static and dynamic inductance and capacitance and their significance in the non-linear and time-varying approaches

    Publication Year: 1963 , Page(s): 353 - 355
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (272 KB)  

    The analysis of circuits such as parametric amplifiers can be approached in two main ways, by regarding the variable element as having either non-linear characteristics largely controlled by a dominant pumping current or voltage, or linear characteristics subject to a specified timevariation. In the former case, ¿dynamic¿ inductance or capacitance may be used with advantage in analysis and measu... View full abstract»

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  • The performance evaluation of television line and microwave links using sine-squared test techniques

    Publication Year: 1963 , Page(s): 357 - 376
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (2172 KB)  

    The principles involved in the use of sine-squared pulse test techniques and the application of this type of test to the assessment of the linear transmission performance of television line and microwave radio links are surveyed in detail. The characteristics of the sine-squared pulse are dealt with from both a mathematical and practical point of view, attention being drawn to the essential differ... View full abstract»

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  • The directional discrimination of volume arrays of electro-acoustic transducers

    Publication Year: 1963 , Page(s): 377 - 383
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (887 KB)  

    The directivity factor of an array of electro-acoustic transducers distributed throughout a cubical volume has been found to vary inversely as the square of the element spacing, as does the factor for the elements occupying one face of the cube. Arrays occupying the volume of a sphere, its surface, and its plane projection show directivity factors which are not inversely proportional to the number... View full abstract»

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  • Points from the discussion on ¿The directional discrimination of volume arrays of electro-acoustic transducers¿

    Publication Year: 1963 , Page(s): 383 - 384
    Save to Project icon | PDF file iconPDF (181 KB)  
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