By Topic

Radio and Electronic Engineer

Issue 5 • Date May 1975

Filter Results

Displaying Results 1 - 11 of 11
  • Leaky feeders

    Publication Year: 1975
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | PDF file iconPDF (133 KB)
    Freely Available from IEEE
  • A general study of the leaky-feeder principle

    Publication Year: 1975, Page(s):205 - 214
    Cited by:  Papers (18)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1224 KB)

    The principle of using the leakage fields of a transmission line to provide mobile radio communication in tunnels has been studied theoretically and experimentally. A mode-conversion theory is developed to account for the fields observed round imperfect bifilar and coaxial lines, and predictions from it are confirmed by observation: the internal velocity ratio of the cable used is an important fac... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Practical performance of radiating cables

    Publication Year: 1975, Page(s):215 - 223
    Cited by:  Papers (14)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (958 KB)

    Experimental techniques are described, which are used to establish the coupling loss between a radiating cable and an antenna, the attenuation per unit length of the cable and its sensitivity to mounting position. Eight different cables were evaluated over a frequency range of 42¿460 MHz. Field strength plotting and digital computer analysis techniques were used to reduce the data recovered from ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Leaky coaxial cable for communication in high speed railway transportation

    Publication Year: 1975, Page(s):224 - 228
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1191 KB)

    The practical performance of leaky coaxial cables is affected by the surrounding materials. Coupling loss and transmission loss vary according to the distance between a concrete wall and the cable. Some experiments were conducted using concrete walls on an experimental railway, and several kinds of installation methods were tested. It was confirmed that the effect of snow was small. It is also sho... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Theory of transmission of electromagnetic waves along multi-conductor lines in the proximity of walls of mine tunnels

    Publication Year: 1975, Page(s):229 - 232
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (474 KB)

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Electromagnetic theory of the leaky coaxial cable

    Publication Year: 1975, Page(s):233 - 240
    Cited by:  Papers (14)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (807 KB)

    The transfer of electromagnetic fields through a grid made of conducting strips similar to the braid of a coaxial cable is expressed by means of a transfer surface impedance relating the tangential electric field to the discontinuity of the tangential magnetic field. This impedance is calculated as a function of the grid parameters. It is then used to establish the electromagnetic theory of a brai... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Control of mode conversions on bifilar line in tunnels

    Publication Year: 1975, Page(s):241 - 247
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (614 KB)

    The influence of frequency and of the position of the line on mode conversions is studied and previous observations of other researchers are explained. The means whereby exchanges between the two propagation modes may be provoked at the level desired, to meet the needs of propagation and coupling between the transmitter and the balanced mode are investigated. These investigations lead to the defin... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Field leakage and crosstalk, with special reference to radiating cables with perforated tape screens

    Publication Year: 1975, Page(s):248 - 252
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (479 KB)

    Field leakage is considered as a special case of cable crosstalk, and comparison is made with the theory published by D. J. R. Martin. Important parameters are the cable dielectric permittivity and the surface transfer impedance of the screen. Perforated type screens are treated by Kaden's theory, and the results give reasonable agreement with experimental measurements of surface transfer impedanc... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • CEI proposals for reorganization of the engineering profession

    Publication Year: 1975, Page(s):257 - 261
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (788 KB)

    The Council of Engineering Institutions (CEI) issued on 17th April the full text of a report by the Council's Executive Committee to the Board of CEI concerning the future organization of the engineering profession. The paper is not yet CEI policy since this can only be determined by the CEI Board itself. It is however being presented here in full to receive as wide and early publicity as possible... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Obituary

    Publication Year: 1975, Page(s):263 - 264
    IEEE is not the copyright holder of this material | PDF file iconPDF (354 KB)
    Freely Available from IEEE
  • New books received

    Publication Year: 1975, Page(s):266 - 267
    IEEE is not the copyright holder of this material | PDF file iconPDF (409 KB)
    Freely Available from IEEE