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    Wave Impedance for near and far field examples

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    Discuss the nature of the wave impedance at a distance of 1 metre
    from the following devices:

    (i) A microwave oven operating at a frequency of 2.45 GHz.
    (ii) A radio-frequency heat-sealer operating at 27 MHz.
    (iii) The field coil of a 'deactivation pad' operating at 60 kHz. The
    pad is used in retail stores to demagnetise the tags attached to
    merchandise to prevent theft.

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    The nature of the electromagnetic wave impedance at a distance of 1 metre
    from the following devices is ...

    Solution Summary

    The nature of the electromagnetic wave impedance at a distance of 1 metre
    from the following devices is discussed:

    (i) A microwave oven operating at a frequency of 2.45 GHz.
    (ii) A radio-frequency heat-sealer operating at 27 MHz.
    (iii) The field coil of a 'deactivation pad' operating at 60 kHz. The
    pad is used in retail stores to demagnetise the tags attached to
    merchandise to prevent theft.

    $2.19

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