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Volume 99
Issue 57
Proceedings of the IEE - Part III: Radio and Communication Engineering
Volume 99, Issue 57, January 1952
Volumes & issues:
Volume 99, Issue 57
January 1952
Radio Section: Chairman's address. Trunk radio systems
- Author(s): D.C. Espley
- Source: Proceedings of the IEE - Part III: Radio and Communication Engineering, Volume 99, Issue 57, p. 1 –5
- DOI: 10.1049/pi-3.1952.0001
- Type: Article
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Meetings of the Radio Section: abridged minutes
- Source: Proceedings of the IEE - Part III: Radio and Communication Engineering, Volume 99, Issue 57, page: 5 –5
- DOI: 10.1049/pi-3.1952.0002
- Type: Article
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A dipole with a tuned parasitic radiator
- Author(s): Ronold King
- Source: Proceedings of the IEE - Part III: Radio and Communication Engineering, Volume 99, Issue 57, p. 6 –14
- DOI: 10.1049/pi-3.1952.0003
- Type: Article
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The electric field, the front/back ratio, and the input impedance of an antenna with a single, tuned, parasitic radiator at constant power are determined, with the newly available approximate second-order self- and mutual impedances used instead of the previous first-order values, which were much less accurate. Theoretical curves for the field and for the front/back ratio are compared with the experimental data of several investigators and it is shown that, if account is taken of significant factors, theory and experiment are in agreement.
The travelling-wave valve as a microwave phase-modulator and frequency-shifter
- Author(s): W.J. Bray
- Source: Proceedings of the IEE - Part III: Radio and Communication Engineering, Volume 99, Issue 57, p. 15 –20
- DOI: 10.1049/pi-3.1952.0004
- Type: Article
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The principles of the travelling-wave valve as a phase-modulator and frequency-shifter are discussed. Measurements made on a typical valve operating at 4 000 Mc/s are recorded and show that about ± 2.5 radians linear phase shift is obtainable with a modulating signal of ± 50 volts injected in series with the beam voltage. Larger phase shifts may be obtained by applying the modulating voltage to a number of valves in tandem.Travelling-wave valves may also be used to shift the frequency of a carrier, e.g. from 4 000 to 4 035 Mc/s, by injecting a 35-Mc/s sinusoidal voltage in series with the beam voltage. When used in this way the gain and power output are only about 6 db below those obtained with the same valve used as an amplifier. The possible applications of travelling-wave valves as phase-modulators and frequency-shifters in the transmitters and repeaters of radio relay systems are discussed.
The relative power-carrying capacity of high-frequency waveguides
- Author(s): H.M. Barlow
- Source: Proceedings of the IEE - Part III: Radio and Communication Engineering, Volume 99, Issue 57, p. 21 –27
- DOI: 10.1049/pi-3.1952.0005
- Type: Article
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The paper is an attempt to assess the power-carrying capacity, within the limits of electrical breakdown, of various forms of metal waveguide. The discussion relates to wave modes commonly used inside tubes of rectangular and circular cross-section, or alternatively outside a solid wire.It is assumed that the guides are surrounded by air dielectric, of uniform cross-section, free of obstacles and discontinuities. The results show that for hollow guides the H modes are inferior to the E modes in respect of power-carrying capacity.The solid wire guide supporting a surface wave has an astonishing performance considering the cross-section of the conductor concerned, and for millimetre wavelengths particularly this form has much to recommend it.
Radiation measuring instruments for X-rays to cosmic rays
- Author(s): D. Taylor and W. Abson
- Source: Proceedings of the IEE - Part III: Radio and Communication Engineering, Volume 99, Issue 57, p. 28 –30
- DOI: 10.1049/pi-3.1952.0006
- Type: Article
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Radiation measuring instruments for the infra-red to ultra-violet waveband
- Author(s): A.C. Menzies
- Source: Proceedings of the IEE - Part III: Radio and Communication Engineering, Volume 99, Issue 57, p. 30 –31
- DOI: 10.1049/pi-3.1952.0007
- Type: Article
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Instruments for use in the microwave band
- Author(s): A.F. Harvey
- Source: Proceedings of the IEE - Part III: Radio and Communication Engineering, Volume 99, Issue 57, page: 32 –32
- DOI: 10.1049/pi-3.1952.0008
- Type: Article
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The resistance of round-wire single-layer inductance coils
- Author(s): A.H.M. Arnold
- Source: Proceedings of the IEE - Part III: Radio and Communication Engineering, Volume 99, Issue 57, p. 33 –34
- DOI: 10.1049/pi-3.1952.0009
- Type: Article
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Observations on the electrical breakdown of gases at 2800 Mc/s
- Author(s): W.A. Prowse and W. Jasinski
- Source: Proceedings of the IEE - Part III: Radio and Communication Engineering, Volume 99, Issue 57, p. 34 –36
- DOI: 10.1049/pi-3.1952.0010
- Type: Article
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