IEE Proceedings - Science, Measurement and Technology

IEE Proceedings - Science, Measurement and Technology

Online ISSN 1359-7094
Print ISSN 1350-2344

Published from 1994-2006, IEE Proceedings - Science, Measurement and Technology contained significant and original contributions on science, measurement and technology, together with topics of general interest to electrical engineers. It included papers in the science, engineering and technology underpinning electronic and electrical engineering, nanotechnology and medical instrumentation.

This journal was previously known as IEE Proceedings A (Science, Measurement and Technology) 1991-1993. ISSN 0960-7641. more..

This publication is continued by IET Science, Measurement & Technology 2007-. ISSN 1751-8822. more..

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Editorial: Selected papers from BEMC 2005
- Author(s): J. M. Williams
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- p. 209 (1)
Vector measurement of modulated RF signals by an in-phase and quadrature referencing technique
- Author(s): D.A. Humphreys
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- p. 210 –215 (6)
  Vector measurements of modulated RF signals are demonstrated using a sampling oscilloscope with in-phase and quadrature referencing. Certain sampling oscilloscope designs exhibit sub-picosecond time-correlation between channels. This correlation allows independent referencing of the carrier frequency and the modulation signals. This measurement technique, which can be implemented using simple RF components, provides an alternative to real-time digitising oscilloscopes or real-time spectrum analysers and can be used at higher RF frequencies than is currently possible with these other methods for repetitive RF waveforms. Experimental results are presented for a pulsed RF power application and for 4QAM, 16QAM and DQPSK wireless communication coding schemes.
Measurement of cross-polar transmission in free space
- Author(s): P. Lederer ; S. Szwarnowski ; T. Hodgetts
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- p. 216 –221 (6)
  A method is described for measuring the cross-polar transmission coefficient of a flat-panel sample in free space using a quasi-optical bench between 8 and 13 GHz. Impedance matching to both co- and cross-polar components simultaneously, so as to prevent reflection of one of them from the rectangular waveguide feed, is provided by resistive vanes within the flares of the horn antennas. The bench is calibrated by means of a modified through-reflect-line (TRL) or through-short-delay (TSD) technique and uses a wire grid as a calculable reference standard. The calibration algorithm is based on Speciale's ‘super-TSD’ algorithm, which has been modified so that its stability is enhanced. The method is validated by comparison of measurements on wire grids with theoretical predictions, which showed excellent agreement, provided the test grid was accurately positioned with respect to the reference plane. The method was also compared with approximate experimental methods, which showed moderate agreement.
Transmission coefficients, relative modal powers and radiated field patterns in overmoded coaxial waveguides
- Author(s): J.G. Davis and A.A.P. Gibson
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- p. 222 –228 (7)
  A theoretical formulation is introduced to predict the scattering transmission coefficients, relative modal powers and radiated field patterns of an overmoded coaxial waveguide excited by a single coaxial probe. Various experimental set-ups were designed to measure the spatial variation of the multi-moded waveguide electric field and the related radiation field patterns. The model provided a close correlation with the measured data for structures supporting up to and including the TE₃₁ mode over the majority of the 0.05–10.25 GHz frequency range.
Characterising beadless air lines as reference artefacts for S-parameter measurements at RF and microwave frequencies
- Author(s): C.P. Eiø ; S.J. Protheroe ; N.M. Ridler
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- p. 229 –234 (6)
  Beadless coaxial air dielectric transmission lines can be used as fundamental reference devices for S-parameter measurements at RF and microwave frequencies. However, for these lines to be used for such applications, they must first be characterised accurately in terms of their impedance and propagation characteristics. This includes assessment of the small amount of loss in the line and the associated impact of this loss on other characteristics. A simple method is presented whereby the loss is determined experimentally using a vector network analyser (VNA). The determined loss can then be used to characterise the line so that it can be used for a range of high-precision metrology applications. Two such applications are given: determination of the actual frequency-dependent characteristic impedance of a line; and use of the line's phase constant to verify VNA phase measurements.

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IEE Proceedings - Science, Measurement and Technology

Volumes & issues:

Volume 153 (2006)

Volume 152 (2005)

Volume 151 (2004)

Volume 150 (2003)

Volume 149 (2002)

Volume 148 (2001)

Volume 147 (2000)

Volume 146 (1999)

Volume 145 (1998)

Volume 144 (1997)

Volume 143 (1996)

Volume 142 (1995)

Volume 141 (1994)

Latest content

Editorial: Selected papers from BEMC 2005

Vector measurement of modulated RF signals by an in-phase and quadrature referencing technique

Measurement of cross-polar transmission in free space

Transmission coefficients, relative modal powers and radiated field patterns in overmoded coaxial waveguides

Characterising beadless air lines as reference artefacts for S-parameter measurements at RF and microwave frequencies

Most viewed content for this Journal

Most cited content for this Journal