Volume 103 Issue 12 • November 1956
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The indirectly heated thermistor as a precise a.c.-d.c. transfer device
Publication Year: 1956, Page(s):693 - 703The paper is an investigation into the possibilities of using an indirectly heated thermistor as a precise a.c./d.c. transfer device over a wide range of frequencies. The thermal drift inevitable with such a device has been examined and a procedure for its elimination developed, resulting in a very high degree of thermal stability. Experiments made on the reproducibility of the thermistor seem to ... View full abstract»
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A bridge for the measurement of permittivity
Publication Year: 1956, Page(s):704 - 707
Cited by: Papers (3)A description is given of a null method for the measurement of the complex permittivity of dielectrics. The direct admittance of a 3-terminal capacitor with the sample as dielectric is measured as a complex capacitance, the two components being indicated directly on two 3-terminal variable air capacitors. In addition to these the bridge network comprises transformer ratio-arms and an amplifier who... View full abstract»
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Discussion on "The indirectly heated thermistor as a precise a.c.-d.c. transfer device" and "A bridge for the measurement of permittivity" before the Measurement and Control Section, 17th April, 1956
Publication Year: 1956, Page(s):707 - 708|
PDF (374 KB)
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The authors' replies to the discussion on "The indirectly heated thermistor as a precise a.c.-d.c. transfer device" and "A bridge for the measurement of permittivity"
Publication Year: 1956|
PDF (101 KB)
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Discussion on "The application of the Hall effect in a semi-conductor to the measurement of power in an electromagnetic field" and "The design of semi-conductor wattmeters for power-frequency and audio-frequency applications"
Publication Year: 1956|
PDF (177 KB)
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The forty-seventh Kelvin Lecture. 'Radio astronomy and the Jodrell Bank telescope'
Publication Year: 1956, Page(s):711 - 721The lecture describes some of the scientific characteristics of the 250 ft-aperture steerable radio telescope at the Jodrell Bank Experimental Station of the University of Manchester. Some of the research problems on which the telescope will be used are then outlined against the current background in radio astronomy. These include the study of the background continuum radio emission of the Galaxy ... View full abstract»
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Time sharing as a basis for electronic telephone switching. A switched-highways system
Publication Year: 1956, Page(s):722 - 742All telephone systems incorporate time-sharing techniques in order to economize in apparatus, but the extent of their application depends upon the operating speeds and adaptability of the components used. The introduction of electronic techniques enables various switching, coding and sampling techniques to be used to achieve a higher degree of time sharing than has previously been possible. In a s... View full abstract»
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Discussion on "Time sharing as a basis for electronic telephone switching. A switched-highways system" before the radio and telecommunication section, 9th may, 1956
Publication Year: 1956, Page(s):736 - 741|
PDF (1152 KB)
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The author's reply to the discussion on "Time sharing as a basis for electronic telephone switching. A switched-highways system"
Publication Year: 1956, Page(s):741 - 742|
PDF (340 KB)
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An investigation of atmospheric radio noise at very low frequencies
Publication Year: 1956, Page(s):743 - 751
Cited by: Papers (7)A description is given of a technique for investigating the characteristics of atmospheric noise, and of the type of information obtained at very low frequencies. The results quoted are typical of those which have been obtained in southern England during a long period of recording, but a discussion of the statistics of all the data is not included. Atmospheric noise in a bandwidth of 300 c/s at fr... View full abstract»
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An experimental assessment of the linearity of a V.H.F. transmitter
Publication Year: 1956, Page(s):752 - 756An experimental procedure is described for testing the assumption that a generator behaves as a linear source. The source admittance is obtained from measurements made when the generator is operating normally, and the problem considered is that of matching this source admittance to the characteristic admittance of the feeder connecting it to a wide-band aerial. View full abstract»
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Polarization discrimination in v.h.f. reception
Publication Year: 1956, Page(s):757 - 760An account is given of measurements in the band 40¿200 Mc/s of the discrimination likely to be achievable between common-frequency transmissions by the use of orthogonal polarizations. It is shown that the discrimination is determined primarily by the topographical nature of the receiving site, that it is substantially independent of distance from the transmitter and of frequency in the band unde... View full abstract»
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Some aircraft measurements of beyond-the-horizon propagation phenomena at 91.3 Mc/s
Publication Year: 1956, Page(s):761 - 763
Cited by: Papers (4)Field-strength measurements at distances extending far beyond the horizon from a transmitter on a frequency of 91.3 Mc/s have been carried out in an aircraft flying at a height of 10000 ft. The analysis of the results obtained and their correlation with meteorological data suggest that many phenomena of long-distance propagation could possibly be explained by the simple hypothesis of specular refl... View full abstract»
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Discussion on 'The vertical radiation patterns of medium-wave broadcasting aerials'
Publication Year: 1956|
PDF (154 KB)
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An experimental design study of some S- and X-band helical aerial systems
Publication Year: 1956, Page(s):764 - 771The general characteristics of helical aerials are summarized and the results of polar-diagram measurements in the S- and X-bands are given for single and multiple helices. Reference is made to methods of widening both the beam width and the bandwidth obtained with a helical aerial by means such as end loading and tapering. The possibility of adapting helical aerials to give wide-band linearly pol... View full abstract»
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Discussion on ¿A short modern review of fundamental electromagnetic theory¿
Publication Year: 1956, Page(s):771 - 772|
PDF (322 KB)
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Discussion on 'The new high-frequency transmitting station at Rugby'
Publication Year: 1956|
PDF (177 KB)
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On the measurement of attenuation in ultrasonic delay lines
Publication Year: 1956, Page(s):773 - 780
Cited by: Papers (6)A theoretical and experimental study has been made of the effects of coupling films on the propagation of compressional waves from a transducer to a solid medium. In practice it has been found that `wringing¿ the transducer to the specimen with oil as a coupling medium produces a film of non-uniform thickness. Although the variations in thickness are of the order of a wavelength of light, these v... View full abstract»
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Researches into spark generation of microwaves
Publication Year: 1956, Page(s):781 - 787
Cited by: Papers (1)A study of microwave spark generators shows that they have certain useful characteristics. In particular, the wide band of frequencies generated permits the use of filters to select any desired band of any width. Both post and iris type of filters were used. The measurements of wavelength and bandwidth were carried out with the help of a Boltzmann interferometer using a cathode-ray oscilloscope an... View full abstract»
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Discussion on "The launching of a plane surface wave"
Publication Year: 1956, Page(s):787 - 788|
PDF (177 KB)
Aims & Scope
Published from 1955-1958, the Proceedings of the IEE - Part B: Radio and Electronic Engineering included all specialized papers on radio and electronic engineering (including communication engineering) that were presented to the Institution. Also included were the formal proceedings of the Radio Section of the Institution and the papers which were read before that Section, together with discussions on them.