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Non-stationary electromagnetic field measurements accuracy improvement

Author

Listed:
  • Tomasz Dlugosz

    (Technical University of Wroclaw)

  • Hubert Trzaska

    (Technical University of Wroclaw)

Abstract

Electromagnetic field (EMF) measurements, for labor safety and environment protection purposes, are performed in the near-field. Inaccuracy of the far-field EMF measurements oscillates around ±1 dB or bit worse; in the near-field measurements, errors at the level of ±6 dB must be sometimes accepted. In the case of non-stationary EMF measurements, their sense may be changed from quantitative to qualitative ones. In order to make it possible an estimation of the non-stationary EMF measurement accuracy, it is proposed new method of the meters calibration. The method is based upon a standard excitation with identical signal as the measured one. A set for the purpose includes a pulse generator (of frequency and pulse rating identical with the radiation source) and computer-controlled amplitude modulator that reflects the radiation pattern of an antenna (e.g. radar one) and its rotations. Contrary to calibration using monochromatic continuous wave (CW) excitation, proposed method should be repeated for any radiation source. The disadvantage is compensated by a possibility to estimate (additional) error of the method. Calculations show it at the level of 10%.

Suggested Citation

  • Tomasz Dlugosz & Hubert Trzaska, 2011. "Non-stationary electromagnetic field measurements accuracy improvement," Environment Systems and Decisions, Springer, vol. 31(2), pages 130-133, June.
    • Handle: RePEc:spr:envsyd:v:31:y:2011:i:2:d:10.1007_s10669-011-9306-0
    DOI: 10.1007/s10669-011-9306-0
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    References listed on IDEAS

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    1. Tomasz Dlugosz & Hubert Trzaska, 2007. "Mutual interactions in bioelectromagnetics," Environment Systems and Decisions, Springer, vol. 27(4), pages 403-409, December.
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