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Radio and Electronic Engineer

Issue 7.8 • Date July-August 1979

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Displaying Results 1 - 10 of 10
  • Exploitation of the 100ߝ1000 GHz frequency range

    Publication Year: 1979, Page(s):323 - 324
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (277 KB)

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  • Schottky diode receivers for operation in the 100-1000 GHz region

    Publication Year: 1979, Page(s):333 - 346
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1819 KB)

    Increased interest in the millimetre and submillimetre wavelength regions during the past decade has stimulated the development of sensitive heterodyne receivers for a wide range of applications. The GaAs Schottky-barrier diode has received the most attention as a mixer in this wavelength range as a result of its sensitivity, reliability, mechanical stability and wide bandwidth and its ability to ... View full abstract»

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  • Millimetre wavelength impatt sources

    Publication Year: 1979, Page(s):347 - 350
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (547 KB)

    The paper presents a review of the present capabilities of solid-state `avalanche-diodes¿ at frequencies between 90 and 400 GHz. Applications of solid-state sources are given with information on the relationship of reliability and performance. The diode design and fabrication details are described briefly, and present-day laboratory capabilities are outlined and compared with those of commerciall... View full abstract»

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  • Commercial and scientific applications of millimetric and sub-millimetric waves

    Publication Year: 1979, Page(s):351 - 360
    Cited by:  Papers (10)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1338 KB)

    Until recently, the application of microwave systems has been hampered by the relatively large and expensive equipment, particularly in the millimetre and submillimetre-wave range. The development of more reliable and efficient solid-state sources up to the submillimetre-wave range has now stimulated new interest in commercial applications. Three different approaches can be distinguished, radar, r... View full abstract»

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  • Radar systems for operation at short millimetric wavelengths

    Publication Year: 1979, Page(s):361 - 369
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1365 KB)

    A number of radar systems are now being developed for operation in the 100¿1000 GHz frequency range. A few special-purpose radars are already in limited use in this region. This paper is a survey of radars at short millimetric wavelengths. The new IEEE Standard definition of radar and IEEE Standard letter designations for radar bands are presented with a note on the transitional nature of this fr... View full abstract»

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  • Atmospheric propagation in the frequency range 100-1000 GHz

    Publication Year: 1979, Page(s):370 - 380
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1378 KB)

    The influence of the atmosphere on propagation in the frequency range 100¿1000 GHz is discussed in terms of molecular absorption, effects due to particles or droplets, and refractive effects. Compared with propagation at lower frequencies, molecular absorption shows a substantial increase in effect, mainly due to absorption by water vapour molecules and this aspect is given particular attention. ... View full abstract»

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  • Development of model radar systems between 30 and 900 GHz

    Publication Year: 1979, Page(s):381 - 388
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (814 KB)

    Practical use has been made of frequencies above 30 GHz for the last 20 years in the UK National Radar Modelling Facility to investigate the characteristics of radar reflections from typical radar targets. This paper discusses the purposes, principles and methods of radar scale modelling. It also describes the several different types of measuring radar which are being used at frequencies up to 890... View full abstract»

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  • Waveguides for the 100-1000 GHz frequency range

    Publication Year: 1979, Page(s):389 - 394
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (706 KB)

    Waveguides used, or under consideration, for application at frequencies greater than 100 GHz include dominantmode and overmoded rectangular guides, circular low-loss mode guide, microstrip, H and groove guides, various dielectric guide configurations, suspended strip and fin lines, and quasi-optic guides. Most existing systems, such as receivers, operating in the 100¿¿300 GHz range have utilized r... View full abstract»

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  • Space applications and technology in the 100ߝ1000 GHz frequency range

    Publication Year: 1979, Page(s):395 - 402
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1055 KB)

    This paper reviews the key applications areas for spaceborne systems operating in the 100¿¿1000 GHz spectral range. The strong interaction between the atmosphere and e.m. radiation at these frequencies is discussed and its consequences in terms of applications stated. For radio astronomy the heavy absorption by the atmosphere forces space-borne telescopes to be employed and the primary radio astro... View full abstract»

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  • Physical measurement in the 100ߝ1000 GHz frequency range

    Publication Year: 1979, Page(s):403 - 418
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2140 KB)

    The exploration and exploitation of the submillimetre and millimetre wave regions of the electromagnetic spectrum have progressed steadily over the last twenty years. Sophisticated Fourier spectroradiometric instrumentation, matching in performance that of the conventional instruments developed for the infra-red and visible regions over the last century, has become commercially available. Frequenc... View full abstract»

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