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Characteristics of transverse electric and magnetic field transmission cells at extremely low frequencies

✍ Scribed by A. W. Wood; W. T. Joines; C. F. Blackman

Publisher
John Wiley and Sons
Year
1987
Tongue
English
Weight
340 KB
Volume
8
Category
Article
ISSN
0197-8462

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✦ Synopsis

Transverse electric and magnetic field (TEM) cells are often designed to subject samples to electromagnetic radiation of intrinsic impedance (E/H) that is the same as in free space, 377 Q. Earlier work has shown this value to be correct for the RF region above about 2 kHz. In this study, measurements of magnetic fields in the extremely low frequency regions and at DC indicate the E/H ratio to be around 300 Q for frequencies less than 2 kHz in cells of a particular design. This lower value indicates that care should be taken in estimating AC magnetic field intensities from electric field measurements in TEM cells at frequencies below 2 kHz.

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